diff --git a/dumux/common/properties.hh b/dumux/common/properties.hh
index bb621833bca72d58f16784e279faae04df419e0b..48f80f8e46b4a71a43f32a9e92024ba80036c7b0 100644
--- a/dumux/common/properties.hh
+++ b/dumux/common/properties.hh
@@ -276,6 +276,8 @@ struct SherwoodFormulation { using type = UndefinedProperty; };
 
 template<class TypeTag, class MyTypeTag>
 struct NormalizePressure { using type = UndefinedProperty; }; //!<  Returns whether to normalize the pressure term in the momentum balance or not
+template<class TypeTag, class MyTypeTag>
+struct ViscousFluxType { using type = UndefinedProperty; };              //!< The type for the calculation of the (turbulent) viscous (momentum) fluxes
 
 /////////////////////////////////////////////////////////////
 // Properties used by multidomain simulations
diff --git a/dumux/flux/CMakeLists.txt b/dumux/flux/CMakeLists.txt
index 76b85c4062d2e079da6bdad8aa441d944dba9d4b..203eb2d8b5c55a2df92e9f820c140d3a9c50e1c2 100644
--- a/dumux/flux/CMakeLists.txt
+++ b/dumux/flux/CMakeLists.txt
@@ -20,6 +20,7 @@ maxwellstefandiffusioncoefficients.hh
 maxwellstefanslaw.hh
 referencesystemformulation.hh
 shallowwaterflux.hh
+shallowwaterviscousflux.hh
 stationaryvelocityfield.hh
 traits.hh
 upwindscheme.hh
diff --git a/dumux/flux/shallowwater/riemannproblem.hh b/dumux/flux/shallowwater/riemannproblem.hh
index 5c3b8391504fc49665f515ebfa3b94c7c18e6c4c..8cd66120757eb7844dcbb8b99184daa9425a6d0b 100644
--- a/dumux/flux/shallowwater/riemannproblem.hh
+++ b/dumux/flux/shallowwater/riemannproblem.hh
@@ -38,18 +38,17 @@ namespace ShallowWater {
  *
  *
  * Riemann problem applies the hydrostatic reconstruction, uses the
- * Riemann invariants to transform the two-dimensional problem to an
- * one-dimensional problem and solves this new problem, and rotates
- * the problem back. Further it applies an flux limiter for the water
- * flux handle drying of elements.
+ * Riemann invariants to transform the two-dimensional problem to a
+ * one-dimensional problem, solves this new problem, and rotates
+ * the problem back. Further it applies a flux limiter for the water
+ * flux to handle drying elements.
  * The correction of the bed slope source term leads to a
- * non-symmetric flux term at the interface for the momentum equations
- * since DuMuX computes the fluxes twice from each side this does not
+ * non-symmetric flux term at the interface for the momentum equations.
+ * Since DuMuX computes the fluxes twice from each side this does not
  * matter.
  *
- * So far we have only the exact Riemann solver, and the reconstruction
- * after Audusse but further solvers and reconstructions ca be
- * implemented.
+ * So far this implements the exact Riemann solver (with reconstruction
+ * after Audusse).
  *
  * The computed water flux (localFlux[0]) is given in m^2/s, the
  * momentum fluxes (localFlux[1], localFlux[2]) are given in m^3/s^2.
diff --git a/dumux/flux/shallowwaterviscousflux.hh b/dumux/flux/shallowwaterviscousflux.hh
new file mode 100644
index 0000000000000000000000000000000000000000..3e8d84ac5a2b684a564dfc419b5e6fec4dd81aba
--- /dev/null
+++ b/dumux/flux/shallowwaterviscousflux.hh
@@ -0,0 +1,215 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program is free software: you can redistribute it and/or modify    *
+ *   it under the terms of the GNU General Public License as published by    *
+ *   the Free Software Foundation, either version 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program is distributed in the hope that it will be useful,         *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
+ *   GNU General Public License for more details.                            *
+ *                                                                           *
+ *   You should have received a copy of the GNU General Public License       *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+/*!
+ * \file
+ * \ingroup Flux
+ * \copydoc Dumux::ShallowWaterViscousMomentumFlux
+ */
+#ifndef DUMUX_FLUX_SHALLOW_WATER_VISCOUS_FLUX_HH
+#define DUMUX_FLUX_SHALLOW_WATER_VISCOUS_FLUX_HH
+
+#include <cmath>
+#include <algorithm>
+#include <utility>
+#include <dumux/flux/fluxvariablescaching.hh>
+
+namespace Dumux {
+
+/*!
+ * \ingroup Flux
+ * \brief Computes the shallow water viscous momentum flux due to (turbulent) viscosity
+ *        by adding all surrounding shear stresses.
+ *        For now implemented strictly for 2D depth-averaged models (i.e. 3 equations)
+ */
+template<class PrimaryVariables, class NumEqVector, typename std::enable_if_t<NumEqVector::size() == 3, int> = 0>
+class ShallowWaterViscousFlux
+{
+
+public:
+
+    using Cache = FluxVariablesCaching::EmptyDiffusionCache;
+    using CacheFiller = FluxVariablesCaching::EmptyCacheFiller;
+    /*!
+     * \ingroup Flux
+     * \brief Compute the viscous momentum flux contribution from the interface
+     *        shear stress
+     *
+     *        The viscous momentum flux
+     *        \f[
+     *        \int \int_{V} \mathbf{\nabla} \cdot \nu_t h \mathbf{\nabla} \mathbf{u} dV
+     *        \f]
+     *        is re-written using Gauss' divergence theorem to:
+     *        \f[
+     *        \int_{S_f} \nu_t h \mathbf{\nabla} \mathbf{u} \cdot \mathbf{n_f} dS
+     *        \f]
+     *
+     * \todo The implementation now is the simplest one involving
+     *       only direct neighbours. This implementation is not complete/
+     *       correct on non-orthogonal meshes. A more complete implementation
+     *       with a more elaborate stencil that also takes into account
+     *       the non-orthogonal contributions can be considered at a later stage.
+     */
+    template<class Problem, class FVElementGeometry, class ElementVolumeVariables>
+    static NumEqVector flux(const Problem& problem,
+                            const typename FVElementGeometry::GridGeometry::GridView::template Codim<0>::Entity& element,
+                            const FVElementGeometry& fvGeometry,
+                            const ElementVolumeVariables& elemVolVars,
+                            const typename FVElementGeometry::SubControlVolumeFace& scvf)
+    {
+        using Scalar = typename PrimaryVariables::value_type;
+
+        NumEqVector localFlux(0.0);
+
+        // Get the inside and outside volume variables
+        const auto& insideVolVars = elemVolVars[scvf.insideScvIdx()];
+        const auto& outsideVolVars = elemVolVars[scvf.outsideScvIdx()];
+
+        const auto& insideScv = fvGeometry.scv(scvf.insideScvIdx());
+        const auto& outsideScv = fvGeometry.scv(scvf.outsideScvIdx());
+
+        const auto [gradU, gradV] = [&]()
+        {
+            // The left (inside) and right (outside) states
+            const auto velocityXLeft   = insideVolVars.velocity(0);
+            const auto velocityYLeft   = insideVolVars.velocity(1);
+            const auto velocityXRight  = outsideVolVars.velocity(0);
+            const auto velocityYRight  = outsideVolVars.velocity(1);
+
+            // Compute the velocity gradients normal to the face
+            // Factor that takes the direction of the unit vector into account
+            const auto& cellCenterToCellCenter = outsideScv.center() - insideScv.center();
+            const auto distance = cellCenterToCellCenter.two_norm();
+            const auto& unitNormal = scvf.unitOuterNormal();
+            const auto direction = (unitNormal*cellCenterToCellCenter)/distance;
+            return std::make_pair(
+                (velocityXRight-velocityXLeft)*direction/distance,
+                (velocityYRight-velocityYLeft)*direction/distance
+            );
+        }();
+
+        // Use a harmonic average of the depth at the interface.
+        const auto waterDepthLeft  = insideVolVars.waterDepth();
+        const auto waterDepthRight = outsideVolVars.waterDepth();
+        const auto averageDepth = 2.0*(waterDepthLeft*waterDepthRight)/(waterDepthLeft + waterDepthRight);
+
+        // compute the turbulent viscosity contribution
+        const Scalar turbViscosity = [&,gradU=gradU,gradV=gradV]()
+        {
+            // The (constant) background turbulent viscosity
+            static const auto turbBGViscosity = getParam<Scalar>("ShallowWater.TurbulentViscosity", 1.0e-6);
+
+            // Check whether the mixing-length turbulence model is used
+            static const auto useMixingLengthTurbulenceModel = getParam<bool>("ShallowWater.UseMixingLengthTurbulenceModel", false);
+
+            // constant eddy viscosity equal to the prescribed background eddy viscosity
+            if (!useMixingLengthTurbulenceModel)
+                return turbBGViscosity;
+
+            // turbulence model based on mixing length
+            // Compute the turbulent viscosity using a combined horizonal/vertical mixing length approach
+            // Turbulence coefficients: vertical (Elder like) and horizontal (Smagorinsky like)
+            static const auto turbConstV = getParam<Scalar>("ShallowWater.VerticalCoefficientOfMixingLengthModel", 1.0);
+            static const auto turbConstH = getParam<Scalar>("ShallowWater.HorizontalCoefficientOfMixingLengthModel", 0.1);
+
+            /** The vertical (Elder-like) contribution to the turbulent viscosity scales with water depth \f[ h \f] and shear velocity \f[ u_{*} \f] :
+            *
+            * \f[
+            * \nu_t^v = c^v \frac{\kappa}{6} u_{*} h
+            * \f]
+            */
+            constexpr Scalar kappa = 0.41;
+            // Compute the average shear velocity on the face
+            const Scalar ustar = [&]()
+            {
+                // Get the bottom shear stress in the two adjacent cells
+                // Note that element is not needed in spatialParams().frictionLaw (should be removed). For now we simply pass the same element twice
+                const auto& bottomShearStressInside = problem.spatialParams().frictionLaw(element, insideScv).shearStress(insideVolVars);
+                const auto& bottomShearStressOutside = problem.spatialParams().frictionLaw(element, outsideScv).shearStress(outsideVolVars);
+                const auto bottomShearStressInsideMag = bottomShearStressInside.two_norm();
+                const auto bottomShearStressOutsideMag = bottomShearStressOutside.two_norm();
+
+                // Use a harmonic average of the viscosity and the depth at the interface.
+                using std::max;
+                const auto averageBottomShearStress = 2.0*(bottomShearStressInsideMag*bottomShearStressOutsideMag)
+                        / max(1.0e-8,bottomShearStressInsideMag + bottomShearStressOutsideMag);
+
+                // Shear velocity possibly needed in mixing-length turbulence model in the computation of the diffusion flux
+                using std::sqrt;
+                return sqrt(averageBottomShearStress);
+            }();
+
+            const auto turbViscosityV = turbConstV * (kappa/6.0) * ustar * averageDepth;
+
+            /** The horizontal (Smagorinsky-like) contribution to the turbulent viscosity scales with the water depth (squared)
+            * and the magnitude of the stress (rate-of-strain) tensor:
+            *
+            * \f[
+            * nu_t^h = (c^h h)^2 \sqrt{ 2\left(\frac{\partial u}{\partial x}\right)^2 + \left(\frac{\partial u}{\partial y} + \frac{\partial v}{\partial x}\right)^2 + 2\left(\frac{\partial v}{\partial y}\right)^2 }
+            * \f]
+            *
+            * However, based on the velocity vectors in the direct neighbours of the volume face, it is not possible to compute all components of the stress tensor.
+            * Only the gradients of u and v in the direction of the vector between the cell centres is available.
+            * To avoid the reconstruction of the full velocity gradient tensor based on a larger stencil,
+            * the horizontal contribution to the eddy viscosity (in the mixing-length model) is computed using only the velocity gradients normal to the face:
+            *
+            * \f[
+            * \frac{\partial u}{\partial n} , \frac{\partial v}{\partial n}
+            * \f]
+            *
+            * In other words, the present approximation of the horizontal contribution to the turbulent viscosity reduces to:
+            *
+            * \f[
+            * nu_t^h = (c^h h)^2 \sqrt{ 2\left(\frac{\partial u}{\partial n}\right)^2 + 2\left(\frac{\partial v}{\partial n}\right)^2 }
+            * \f]
+            *
+            It should be noted that this simplified approach is formally inconsistent and will result in a turbulent viscosity that is dependent on the grid (orientation).
+            */
+            using std::sqrt;
+            const auto mixingLengthSquared = turbConstH * turbConstH * averageDepth * averageDepth;
+            const auto turbViscosityH = mixingLengthSquared * sqrt(2.0*gradU*gradU + 2.0*gradV*gradV);
+
+            // Total turbulent viscosity
+            return turbBGViscosity + sqrt(turbViscosityV*turbViscosityV + turbViscosityH*turbViscosityH);
+        }();
+
+        // Compute the viscous momentum fluxes
+        const auto uViscousFlux = turbViscosity * averageDepth * gradU;
+        const auto vViscousFlux = turbViscosity * averageDepth * gradV;
+
+        // compute the mobility of the flux with the fluxlimiter
+        static const auto upperWaterDepthFluxLimiting = getParam<double>("FluxLimiterLET.UpperWaterDepth", 1e-3);
+        static const auto lowerWaterDepthFluxLimiting = getParam<double>("FluxLimiterLET.LowerWaterDepth", 1e-5);
+
+        const auto limitingDepth = (waterDepthLeft + waterDepthRight) * 0.5;
+        const auto mobility = ShallowWater::fluxLimiterLET(limitingDepth,
+                                                           limitingDepth,
+                                                           upperWaterDepthFluxLimiting,
+                                                           lowerWaterDepthFluxLimiting);
+
+        localFlux[0] = 0.0;
+        localFlux[1] = -uViscousFlux * mobility * scvf.area();
+        localFlux[2] = -vViscousFlux * mobility * scvf.area();
+
+        return localFlux;
+    }
+};
+
+} // end namespace Dumux
+
+#endif
diff --git a/dumux/freeflow/shallowwater/boundaryfluxes.hh b/dumux/freeflow/shallowwater/boundaryfluxes.hh
index b5b3da9a9a1d480bba193e3913d7493e8a718d23..739a338ed438560371d5ebef8dc79318a1012ca7 100644
--- a/dumux/freeflow/shallowwater/boundaryfluxes.hh
+++ b/dumux/freeflow/shallowwater/boundaryfluxes.hh
@@ -5,7 +5,7 @@
  *                                                                           *
  *   This program is free software: you can redistribute it and/or modify    *
  *   it under the terms of the GNU General Public License as published by    *
- *   the Free Software Foundation, either version 2 of the License, or       *
+ *   the Free Software Foundation, either version 3 of the License, or       *
  *   (at your option) any later version.                                     *
  *                                                                           *
  *   This program is distributed in the hope that it will be useful,         *
@@ -32,14 +32,14 @@
 
 #include <array>
 #include <cmath>
+#include <algorithm>
 
-namespace Dumux {
-namespace ShallowWater {
+namespace Dumux::ShallowWater {
 
 /*!
  * \brief Compute the outer cell state for fixed water depth boundary.
  *
- * \param waterDepthBoundary Discharge per meter at the boundary face [m^2/s]
+ * \param waterDepthBoundary Water depth at the boundary face [m^2/s]
  * \param waterDepthInside Water depth in the inner cell [m]
  * \param velocityXInside Velocity in x-direction in the inner cell [m/s]
  * \param velocityYInside Velocity in y-direction in the inner cell [m/s]
@@ -127,7 +127,98 @@ std::array<Scalar, 3> fixedDischargeBoundary(const Scalar dischargeBoundary,
     return cellStateOutside;
 }
 
-} // end namespace ShallowWater
-} // end namespace Dumux
+/*!
+ * \brief Compute the viscosity/diffusive flux at a rough wall boundary using no-slip formulation.
+ *
+ * \param alphaWall Roughness parameter: alphaWall=0.0 means full slip, alphaWall=1.0 means no slip, 0.0<alphaWall<1.0 means partial slip [-]
+ * \param turbulentViscosity Turbulent viscosity [m^2/s]
+ * \param state Primary variables (water depth, velocities)
+ * \param cellCenterToBoundaryFaceCenter Cell-center to boundary distance
+ * \param unitNormal Normal vector of the boundary face
+ */
+template<class PrimaryVariables, class Scalar, class GlobalPosition>
+std::array<Scalar, 3> noslipWallBoundary(const Scalar alphaWall,
+                                         const Scalar turbulentViscosity,
+                                         const PrimaryVariables& state,
+                                         const GlobalPosition& cellCenterToBoundaryFaceCenter,
+                                         const GlobalPosition& unitNormal)
+{
+    // only impose if abs(alphaWall) > 0
+    using std::abs;
+    if (abs(alphaWall) <= 1.0e-9)
+        return {};
+
+    const auto waterDepth = state[0];
+    // regularization: Set gradients to zero for drying cell
+    // Use LET-limiter instead for differentiability?
+    if (waterDepth <= 0.001)
+        return {};
+
+    const auto xVelocity  = state[1];
+    const auto yVelocity  = state[2];
+    const auto distance = cellCenterToBoundaryFaceCenter.two_norm();
+
+    // Compute the velocity gradients
+    // Outside - inside cell: therefore the minus-sign
+    // Only when cell contains sufficient water.
+    const auto gradU = -alphaWall * xVelocity/distance;
+    const auto gradV = -alphaWall * yVelocity/distance;
+
+    // Factor that takes the direction of the unit vector into account
+    const auto direction = (unitNormal*cellCenterToBoundaryFaceCenter)/distance;
+
+    // Compute the viscosity/diffusive fluxes at the rough wall
+    return {
+        0.0,
+        -turbulentViscosity*waterDepth*gradU*direction,
+        -turbulentViscosity*waterDepth*gradV*direction
+    };
+}
+
+/*!
+ * \brief Compute the viscosity/diffusive flux at a rough wall boundary using Nikuradse formulation.
+ *
+ * \param ksWall Nikuradse roughness height for the wall [m]
+ * \param state the primary variable state (water depth, velocities)
+ * \param cellCenterToBoundaryFaceCenter Cell-center to boundary distance
+ * \param unitNormal Normal vector of the boundary face
+ */
+template<class PrimaryVariables, class Scalar, class GlobalPosition>
+std::array<Scalar, 3> nikuradseWallBoundary(const Scalar ksWall,
+                                            const PrimaryVariables& state,
+                                            const GlobalPosition& cellCenterToBoundaryFaceCenter,
+                                            const GlobalPosition& unitNormal)
+{
+    // only impose if abs(ksWall) > 0
+    using std::abs;
+    if (abs(ksWall) <= 1.0e-9)
+        return {};
+
+    using std::hypot;
+    const Scalar xVelocity = state[1];
+    const Scalar yVelocity = state[2];
+    const Scalar velocityMagnitude = hypot(xVelocity, yVelocity);
+    const Scalar distance = cellCenterToBoundaryFaceCenter.two_norm();
+    const Scalar y0w = ksWall/30.0;
+    constexpr Scalar kappa2 = 0.41*0.41;
+
+    // should distance/y0w be limited to not become too small?
+    using std::log; using std::max;
+    const auto logYPlus = log(distance/y0w+1.0);
+    const auto fac = kappa2*velocityMagnitude / max(1.0e-3,logYPlus*logYPlus);
+
+    // Factor that takes the direction of the unit vector into account
+    const auto direction = (unitNormal*cellCenterToBoundaryFaceCenter)/distance;
+
+    // wall shear stress vector
+    const auto tauWx = direction*fac*xVelocity;
+    const auto tauWy = direction*fac*yVelocity;
+
+    // Compute the viscosity/diffusive fluxes at the rough wall
+    const auto waterDepth = state[0];
+    return {0.0, waterDepth*tauWx, waterDepth*tauWy};
+}
+
+} // end namespace Dumux::ShallowWater
 
 #endif
diff --git a/dumux/freeflow/shallowwater/fluxvariables.hh b/dumux/freeflow/shallowwater/fluxvariables.hh
index 57daf7e066ace07e733ed4a1838519d24ca66842..1b70f8f767cf011fc24ca85766c1d70a1990dd02 100644
--- a/dumux/freeflow/shallowwater/fluxvariables.hh
+++ b/dumux/freeflow/shallowwater/fluxvariables.hh
@@ -45,7 +45,7 @@ class ShallowWaterFluxVariables
     using ModelTraits = GetPropType<TypeTag, Properties::ModelTraits>;
     using NumEqVector = GetPropType<TypeTag, Properties::NumEqVector>;
     using AdvectionType = GetPropType<TypeTag, Properties::AdvectionType>;
-    //using DiffusionType = GetPropType<TypeTag, Properties::DiffusionType>;
+    using ViscousFluxType = GetPropType<TypeTag, Properties::ViscousFluxType>;
 
     using GridVariables = GetPropType<TypeTag, Properties::GridVariables>;
     using GridVolumeVariables = typename GridVariables::GridVolumeVariables;
@@ -58,7 +58,6 @@ class ShallowWaterFluxVariables
     using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace;
 
     static constexpr bool enableAdvection = ModelTraits::enableAdvection();
-    static constexpr bool enableDiffusion = ModelTraits::enableDiffusion();
 
 public:
 
@@ -79,20 +78,17 @@ public:
     }
 
     /*!
-     * \brief Returns the diffusive flux (e.g. diffusion of tracer)
+     * \brief Returns the viscous momentum flux
      *
      */
-    NumEqVector diffusiveFlux(const Problem& problem,
-                              const Element& element,
-                              const FVElementGeometry& fvGeometry,
-                              const ElementVolumeVariables& elemVolVars,
-                              const SubControlVolumeFace& scvf) const
+    NumEqVector viscousFlux(const Problem& problem,
+                            const Element& element,
+                            const FVElementGeometry& fvGeometry,
+                            const ElementVolumeVariables& elemVolVars,
+                            const SubControlVolumeFace& scvf) const
     {
-        // TODO: add diffusive flux (e.g. tracer and viscosity)
-        if (enableDiffusion)
-            return NumEqVector(0.0);
-
-        return NumEqVector(0.0);
+        // Add viscous momentum flux
+        return ViscousFluxType::flux(problem, element, fvGeometry, elemVolVars, scvf);
     }
 };
 
diff --git a/dumux/freeflow/shallowwater/localresidual.hh b/dumux/freeflow/shallowwater/localresidual.hh
index c186b5b06478d5324485e4ae69e57e57193fade5..bfcc6d193e8d9f2ae5324e9fe8264cbdd721652c 100644
--- a/dumux/freeflow/shallowwater/localresidual.hh
+++ b/dumux/freeflow/shallowwater/localresidual.hh
@@ -78,7 +78,7 @@ public:
     }
 
        /*!
-     * \brief Evaluate the mass flux over a face of a sub control volume
+     * \brief Evaluate the mass/momentum flux over a face of a sub control volume
      *
      * \param problem The problem
      * \param element The current element.
@@ -97,7 +97,11 @@ public:
         NumEqVector flux(0.0);
         FluxVariables fluxVars;
         flux += fluxVars.advectiveFlux(problem, element, fvGeometry, elemVolVars, scvf);
-        flux += fluxVars.diffusiveFlux(problem, element, fvGeometry, elemVolVars, scvf);
+
+        // Compute viscous momentum flux contribution if required
+        static const bool enableViscousFlux = getParam<bool>("ShallowWater.EnableViscousFlux", false);
+        if (enableViscousFlux)
+            flux += fluxVars.viscousFlux(problem, element, fvGeometry, elemVolVars, scvf);
         return flux;
     }
 };
diff --git a/dumux/freeflow/shallowwater/model.hh b/dumux/freeflow/shallowwater/model.hh
index 15094351f5c3e88940df38810b157b02add33165..bf2a9d745656ef3d89c75f8237cfa9c6748bc601 100644
--- a/dumux/freeflow/shallowwater/model.hh
+++ b/dumux/freeflow/shallowwater/model.hh
@@ -66,6 +66,7 @@
 #include <dumux/common/properties/model.hh>
 
 #include <dumux/flux/shallowwaterflux.hh>
+#include <dumux/flux/shallowwaterviscousflux.hh>
 #include <dumux/flux/fluxvariablescaching.hh>
 
 #include "localresidual.hh"
@@ -89,9 +90,6 @@ struct ShallowWaterModelTraits
 
     //! Enable advection
     static constexpr bool enableAdvection() { return true; }
-
-    //! Enable diffusion
-    static constexpr bool enableDiffusion() { return false; }
 };
 
 /*!
@@ -160,7 +158,9 @@ template<class TypeTag>
 struct AdvectionType<TypeTag, TTag::ShallowWater>
 { using type = ShallowWaterFlux< GetPropType<TypeTag, Properties::NumEqVector> >; };
 
-//template<class TypeTag> struct DiffusionType<TypeTag, TTag::ShallowWater> {using type = ShallowWaterExactRiemannSolver<TypeTag>;};
+template<class TypeTag>
+struct ViscousFluxType<TypeTag, TTag::ShallowWater>
+{ using type = ShallowWaterViscousFlux< GetPropType<TypeTag, Properties::PrimaryVariables>, GetPropType<TypeTag, Properties::NumEqVector> >; };
 
 } // end properties
 } // end namespace Dumux
diff --git a/dumux/freeflow/shallowwater/volumevariables.hh b/dumux/freeflow/shallowwater/volumevariables.hh
index 7aec82fa097de143a5c9be862c4d05aa55101263..6cf905fa083ecf4b09ee4badf1aeaf04c62c9fea 100644
--- a/dumux/freeflow/shallowwater/volumevariables.hh
+++ b/dumux/freeflow/shallowwater/volumevariables.hh
@@ -57,6 +57,10 @@ public:
     Scalar extrusionFactor() const
     { return 1.0; }
 
+    //! Return the vector of primary variables
+    const PrimaryVariables& priVars() const
+    { return priVars_; }
+
      /*!
      * \brief Return water detph h inside the sub-control volume.
      *
diff --git a/test/freeflow/shallowwater/CMakeLists.txt b/test/freeflow/shallowwater/CMakeLists.txt
index a2d8ca961e08fead0abf1e2a91fc8b5a7a16bef4..2f2fec8b7675709ea0dcec2a628829e39c12f97d 100644
--- a/test/freeflow/shallowwater/CMakeLists.txt
+++ b/test/freeflow/shallowwater/CMakeLists.txt
@@ -1,3 +1,4 @@
 add_subdirectory(bowl)
 add_subdirectory(dambreak)
+add_subdirectory(poiseuilleflow)
 add_subdirectory(roughchannel)
diff --git a/test/freeflow/shallowwater/poiseuilleflow/CMakeLists.txt b/test/freeflow/shallowwater/poiseuilleflow/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c8ed563ddab4827c65ceffdaad0c424de17d8ff0
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/CMakeLists.txt
@@ -0,0 +1,48 @@
+dune_symlink_to_source_files(FILES "params.input")
+
+dumux_add_test(NAME test_shallowwater_poiseuilleflow
+               SOURCES main.cc
+               LABELS shallowwater
+               COMPILE_DEFINITIONS GRIDTYPE=Dune::YaspGrid<2,Dune::EquidistantOffsetCoordinates<double,2>>
+               COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
+               CMD_ARGS       --script fuzzy
+                              --files ${CMAKE_SOURCE_DIR}/test/references/test_ff_shallowwater_poiseuilleflow-reference.vtu
+                                      ${CMAKE_CURRENT_BINARY_DIR}/poiseuilleflow-00007.vtu
+                              --zeroThreshold {"velocityY":1e-14}
+                              --command "${CMAKE_CURRENT_BINARY_DIR}/test_shallowwater_poiseuilleflow params.input")
+
+dumux_add_test(NAME test_shallowwater_poiseuilleflow_parallel
+               TARGET test_shallowwater_poiseuilleflow
+               LABELS shallowwater
+               CMAKE_GUARD MPI_FOUND
+               COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
+               CMD_ARGS   --script fuzzy
+                          --files ${CMAKE_SOURCE_DIR}/test/references/test_ff_shallowwater_poiseuilleflow-reference.vtu
+                                  ${CMAKE_CURRENT_BINARY_DIR}/s0002-poiseuilleflow-parallel-00007.pvtu
+                          --zeroThreshold {"velocityY":1e-14,"process rank":100}
+                          --command "${MPIEXEC} -np 2 ${CMAKE_CURRENT_BINARY_DIR}/test_shallowwater_poiseuilleflow params.input -Problem.Name poiseuilleflow-parallel")
+
+dumux_add_test(NAME test_shallowwater_poiseuilleflow_unstructured
+               SOURCES main.cc
+               LABELS shallowwater
+               CMAKE_GUARD dune-uggrid_FOUND
+               COMPILE_DEFINITIONS GRIDTYPE=Dune::UGGrid<2>
+               COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
+               CMD_ARGS       --script fuzzy
+                              --files ${CMAKE_SOURCE_DIR}/test/references/test_ff_shallowwater_poiseuilleflow_unstructured-reference.vtu
+                                      ${CMAKE_CURRENT_BINARY_DIR}/poiseuilleflow-unstructured-00007.vtu
+                              --zeroThreshold {"velocityY":1e-14}
+                              --command "${CMAKE_CURRENT_BINARY_DIR}/test_shallowwater_poiseuilleflow_unstructured params.input -Problem.Name poiseuilleflow-unstructured -Grid.File grids/irregular_grid_10m.dgf")
+
+dumux_add_test(NAME test_shallowwater_poiseuilleflow_unstructured_parallel
+               TARGET test_shallowwater_poiseuilleflow_unstructured
+               LABELS shallowwater
+               CMAKE_GUARD "( MPI_FOUND AND dune-uggrid_FOUND )"
+               COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
+               CMD_ARGS   --script fuzzy
+                          --files ${CMAKE_SOURCE_DIR}/test/references/test_ff_shallowwater_poiseuilleflow_unstructured-reference.vtu
+                                  ${CMAKE_CURRENT_BINARY_DIR}/s0002-poiseuilleflow-unstructured-parallel-00007.pvtu
+                          --zeroThreshold {"velocityY":1e-14,"process rank":100}
+                          --command "${MPIEXEC} -np 2 ${CMAKE_CURRENT_BINARY_DIR}/test_shallowwater_poiseuilleflow_unstructured params.input -Problem.Name poiseuilleflow-unstructured-parallel -Grid.File grids/irregular_grid_10m.dgf")
+
+dune_symlink_to_source_files(FILES "grids")
diff --git a/test/freeflow/shallowwater/poiseuilleflow/grids/irregular_grid_10m.dgf b/test/freeflow/shallowwater/poiseuilleflow/grids/irregular_grid_10m.dgf
new file mode 100644
index 0000000000000000000000000000000000000000..a1a6fbaf46d2762ae20522f44537dd7866ea8096
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/grids/irregular_grid_10m.dgf
@@ -0,0 +1,932 @@
+DGF
+Vertex             % the vertices of the grid
+0.0 -50.0             % vertex  0 
+400.0 -50.0             % vertex  1 
+400.0 50.0             % vertex  2 
+0.0 50.0             % vertex  3 
+200.0 -50.0             % vertex  4 
+400.0 0.0             % vertex  5 
+200.0 50.0             % vertex  6 
+0.0 0.0             % vertex  7 
+100.0 -50.0             % vertex  8 
+300.0 -50.0             % vertex  9 
+400.0 -25.0             % vertex  10 
+400.0 25.0             % vertex  11 
+300.0 50.0             % vertex  12 
+100.0 50.0             % vertex  13 
+0.0 25.0             % vertex  14 
+0.0 -25.0             % vertex  15 
+50.0 -50.0             % vertex  16 
+150.0 -50.0             % vertex  17 
+250.0 -50.0             % vertex  18 
+350.0 -50.0             % vertex  19 
+400.0 -37.5             % vertex  20 
+400.0 -12.5             % vertex  21 
+400.0 12.5             % vertex  22 
+400.0 37.5             % vertex  23 
+350.0 50.0             % vertex  24 
+250.0 50.0             % vertex  25 
+150.0 50.0             % vertex  26 
+50.0 50.0             % vertex  27 
+0.0 37.5             % vertex  28 
+0.0 12.5             % vertex  29 
+0.0 -12.5             % vertex  30 
+0.0 -37.5             % vertex  31 
+25.0 -50.0             % vertex  32 
+75.0 -50.0             % vertex  33 
+125.0 -50.0             % vertex  34 
+175.0 -50.0             % vertex  35 
+225.0 -50.0             % vertex  36 
+275.0 -50.0             % vertex  37 
+325.0 -50.0             % vertex  38 
+375.0 -50.0             % vertex  39 
+375.0 50.0             % vertex  40 
+325.0 50.0             % vertex  41 
+275.0 50.0             % vertex  42 
+225.0 50.0             % vertex  43 
+175.0 50.0             % vertex  44 
+125.0 50.0             % vertex  45 
+75.0 50.0             % vertex  46 
+25.0 50.0             % vertex  47 
+12.5 -50.0             % vertex  48 
+37.5 -50.0             % vertex  49 
+62.5 -50.0             % vertex  50 
+87.5 -50.0             % vertex  51 
+112.5 -50.0             % vertex  52 
+137.5 -50.0             % vertex  53 
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+187.5 -50.0             % vertex  55 
+212.5 -50.0             % vertex  56 
+237.5 -50.0             % vertex  57 
+262.5 -50.0             % vertex  58 
+287.5 -50.0             % vertex  59 
+312.5 -50.0             % vertex  60 
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+387.5 50.0             % vertex  64 
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+312.5 50.0             % vertex  67 
+287.5 50.0             % vertex  68 
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+212.5 50.0             % vertex  71 
+187.5 50.0             % vertex  72 
+162.5 50.0             % vertex  73 
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+112.5 50.0             % vertex  75 
+87.5 50.0             % vertex  76 
+62.5 50.0             % vertex  77 
+37.5 50.0             % vertex  78 
+12.5 50.0             % vertex  79 
+18.3013 39.8584             % vertex  80 
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+30.8449 38.956599999999995             % vertex  82 
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+68.7694 -39.1695             % vertex  84 
+81.2612 -39.1704             % vertex  85 
+81.2255 39.18429999999999             % vertex  86 
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+131.2504 -39.1748             % vertex  90 
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+143.75 39.175             % vertex  92 
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+168.75 -39.175             % vertex  94 
+181.25 -39.175             % vertex  95 
+181.25 39.175             % vertex  96 
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+231.25 -39.175             % vertex  100 
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+331.3224 -39.1993             % vertex  110 
+331.2298 39.1639             % vertex  111 
+343.742 39.1806             % vertex  112 
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+389.2322 6.203000000000003             % vertex  115 
+389.2514 -6.3536             % vertex  116 
+356.3962 -39.1194             % vertex  117 
+369.1934 -38.963             % vertex  118 
+381.7195 -39.8624             % vertex  119 
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+312.4999 -28.351             % vertex  185 
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+391.8223 -41.8097             % vertex  192 
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+50.0781 -28.4135             % vertex  214 
+37.5263 -27.9324             % vertex  215 
+8.1858 -41.7943             % vertex  216 
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+156.2501 -17.525             % vertex  221 
+206.25 -17.525             % vertex  222 
+256.25 -17.525             % vertex  223 
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+56.4592 -17.3662             % vertex  228 
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+268.75 -17.525             % vertex  251 
+306.2435 17.5201             % vertex  252 
+318.7318 17.510800000000003             % vertex  253 
+331.1925 17.476200000000006             % vertex  254 
+318.7499 -17.5283             % vertex  255 
+355.5431 17.828500000000005             % vertex  256 
+356.0584 -18.2105             % vertex  257 
+366.9986 16.515699999999995             % vertex  258 
+368.8495 5.2353999999999985             % vertex  259 
+368.9695 -5.839700000000001             % vertex  260 
+344.3216 -17.8399             % vertex  261 
+331.6322 -17.5439             % vertex  262 
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+32.8684 16.8639             % vertex  274 
+32.9672 -16.5845             % vertex  275 
+31.184 -5.291499999999999             % vertex  276 
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+31.1277 5.786299999999997             % vertex  278 
+75.0 6.700000000000003             % vertex  279 
+112.5 -6.700000000000003             % vertex  280 
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+312.5 6.700000000000003             % vertex  284 
+367.2567 -16.8956             % vertex  285 
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+112.5 6.700000000000003             % vertex  291 
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+49.0159 7.832500000000003             % vertex  293 
+40.2337 0.5698000000000008             % vertex  294 
+87.5 -6.700000000000003             % vertex  295 
+75.0 -6.700000000000003             % vertex  296 
+100.0 -6.700000000000003             % vertex  297 
+125.0 6.700000000000003             % vertex  298 
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+175.0 -6.700000000000003             % vertex  302 
+200.0 -6.700000000000003             % vertex  303 
+225.0 6.700000000000003             % vertex  304 
+250.0 -6.700000000000003             % vertex  305 
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+300.0 -6.700000000000003             % vertex  307 
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+359.916 -0.6762999999999977             % vertex  310 
+337.5 6.700000000000003             % vertex  311 
+325.0 -6.700000000000003             % vertex  312 
+338.8961 -6.384500000000003             % vertex  313 
+275.0 -6.700000000000003             % vertex  314 
+287.5 -6.700000000000003             % vertex  315 
+300.0 6.700000000000003             % vertex  316 
+287.5 6.700000000000003             % vertex  317 
+225.0 -6.700000000000003             % vertex  318 
+237.5 -6.700000000000003             % vertex  319 
+250.0 6.700000000000003             % vertex  320 
+237.5 6.700000000000003             % vertex  321 
+200.0 6.700000000000003             % vertex  322 
+187.5 6.700000000000003             % vertex  323 
+125.0 -6.700000000000003             % vertex  324 
+137.5 -6.700000000000003             % vertex  325 
+150.0 6.700000000000003             % vertex  326 
+137.5 6.700000000000003             % vertex  327 
+100.0 6.700000000000003             % vertex  328 
+87.5 6.700000000000003             % vertex  329 
+61.0683 6.413699999999999             % vertex  330 
+50.4908 -5.2393             % vertex  331 
+39.843 -9.398000000000003             % vertex  332 
+39.5844 9.940800000000003             % vertex  333 
+360.5904 -10.006500000000003             % vertex  334 
+360.1003 9.359900000000003             % vertex  335 
+#
+SIMPLEX             % a simplex grid
+79 80 47             % triangle  0 , vertices  79 ,  80 ,  47 
+79 3 165             % triangle  1 , vertices  79 ,  3 ,  165 
+165 28 151             % triangle  2 , vertices  165 ,  28 ,  151 
+151 14 81             % triangle  3 , vertices  151 ,  14 ,  81 
+86 76 46             % triangle  4 , vertices  86 ,  76 ,  46 
+84 50 33             % triangle  5 , vertices  84 ,  50 ,  33 
+85 84 33             % triangle  6 , vertices  85 ,  84 ,  33 
+76 87 13             % triangle  7 , vertices  76 ,  87 ,  13 
+87 76 86             % triangle  8 , vertices  87 ,  76 ,  86 
+91 74 45             % triangle  9 , vertices  91 ,  74 ,  45 
+138 52 89             % triangle  10 , vertices  138 ,  52 ,  89 
+90 89 34             % triangle  11 , vertices  90 ,  89 ,  34 
+74 92 26             % triangle  12 , vertices  74 ,  92 ,  26 
+92 74 91             % triangle  13 , vertices  92 ,  74 ,  91 
+96 72 44             % triangle  14 , vertices  96 ,  72 ,  44 
+135 54 94             % triangle  15 , vertices  135 ,  54 ,  94 
+95 94 35             % triangle  16 , vertices  95 ,  94 ,  35 
+72 97 6             % triangle  17 , vertices  72 ,  97 ,  6 
+97 72 96             % triangle  18 , vertices  97 ,  72 ,  96 
+101 70 43             % triangle  19 , vertices  101 ,  70 ,  43 
+132 56 99             % triangle  20 , vertices  132 ,  56 ,  99 
+100 99 36             % triangle  21 , vertices  100 ,  99 ,  36 
+70 102 25             % triangle  22 , vertices  70 ,  102 ,  25 
+102 70 101             % triangle  23 , vertices  102 ,  70 ,  101 
+106 68 42             % triangle  24 , vertices  106 ,  68 ,  42 
+129 58 104             % triangle  25 , vertices  129 ,  58 ,  104 
+105 104 37             % triangle  26 , vertices  105 ,  104 ,  37 
+68 107 12             % triangle  27 , vertices  68 ,  107 ,  12 
+107 68 106             % triangle  28 , vertices  107 ,  68 ,  106 
+111 66 41             % triangle  29 , vertices  111 ,  66 ,  41 
+126 60 109             % triangle  30 , vertices  126 ,  60 ,  109 
+110 109 38             % triangle  31 , vertices  110 ,  109 ,  38 
+66 112 24             % triangle  32 , vertices  66 ,  112 ,  24 
+152 112 111             % triangle  33 , vertices  152 ,  112 ,  111 
+122 64 40             % triangle  34 , vertices  122 ,  64 ,  40 
+22 11 114             % triangle  35 , vertices  22 ,  11 ,  114 
+124 24 112             % triangle  36 , vertices  124 ,  24 ,  112 
+115 22 114             % triangle  37 , vertices  115 ,  22 ,  114 
+262 187 196             % triangle  38 , vertices  262 ,  187 ,  196 
+125 61 19             % triangle  39 , vertices  125 ,  61 ,  19 
+62 118 117             % triangle  40 , vertices  62 ,  118 ,  117 
+119 118 39             % triangle  41 , vertices  119 ,  118 ,  39 
+63 1 192             % triangle  42 , vertices  63 ,  1 ,  192 
+119 39 63             % triangle  43 , vertices  119 ,  39 ,  63 
+192 20 120             % triangle  44 , vertices  192 ,  20 ,  120 
+154 23 2             % triangle  45 , vertices  154 ,  23 ,  2 
+123 11 23             % triangle  46 , vertices  123 ,  11 ,  23 
+154 64 122             % triangle  47 , vertices  154 ,  64 ,  122 
+115 114 155             % triangle  48 , vertices  115 ,  114 ,  155 
+61 110 38             % triangle  49 , vertices  61 ,  110 ,  38 
+128 59 9             % triangle  50 , vertices  128 ,  59 ,  9 
+198 127 107             % triangle  51 , vertices  198 ,  127 ,  107 
+59 105 37             % triangle  52 , vertices  59 ,  105 ,  37 
+131 57 18             % triangle  53 , vertices  131 ,  57 ,  18 
+201 130 102             % triangle  54 , vertices  201 ,  130 ,  102 
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+313 287 311             % triangle  443 , vertices  313 ,  287 ,  311 
+263 152 254             % triangle  444 , vertices  263 ,  152 ,  254 
+263 256 197             % triangle  445 , vertices  263 ,  256 ,  197 
+314 288 251             % triangle  446 , vertices  314 ,  288 ,  251 
+315 306 314             % triangle  447 , vertices  315 ,  306 ,  314 
+316 284 252             % triangle  448 , vertices  316 ,  284 ,  252 
+317 306 315             % triangle  449 , vertices  317 ,  306 ,  315 
+318 289 246             % triangle  450 , vertices  318 ,  289 ,  246 
+319 304 318             % triangle  451 , vertices  319 ,  304 ,  318 
+320 283 248             % triangle  452 , vertices  320 ,  283 ,  248 
+321 304 319             % triangle  453 , vertices  321 ,  304 ,  319 
+268 205 237             % triangle  454 , vertices  268 ,  205 ,  237 
+268 175 205             % triangle  455 , vertices  268 ,  175 ,  205 
+322 282 243             % triangle  456 , vertices  322 ,  282 ,  243 
+301 268 237             % triangle  457 , vertices  301 ,  268 ,  237 
+324 280 236             % triangle  458 , vertices  324 ,  280 ,  236 
+325 298 324             % triangle  459 , vertices  325 ,  298 ,  324 
+326 281 238             % triangle  460 , vertices  326 ,  281 ,  238 
+327 298 325             % triangle  461 , vertices  327 ,  298 ,  325 
+272 211 227             % triangle  462 , vertices  272 ,  211 ,  227 
+272 167 211             % triangle  463 , vertices  272 ,  167 ,  211 
+328 291 233             % triangle  464 , vertices  328 ,  291 ,  233 
+295 272 227             % triangle  465 , vertices  295 ,  272 ,  227 
+274 226 213             % triangle  466 , vertices  274 ,  226 ,  213 
+274 166 162             % triangle  467 , vertices  274 ,  166 ,  162 
+275 215 225             % triangle  468 , vertices  275 ,  215 ,  225 
+276 163 218             % triangle  469 , vertices  276 ,  163 ,  218 
+333 274 278             % triangle  470 , vertices  333 ,  274 ,  278 
+278 162 163             % triangle  471 , vertices  278 ,  162 ,  163 
+330 279 229             % triangle  472 , vertices  330 ,  279 ,  229 
+331 330 293             % triangle  473 , vertices  331 ,  330 ,  293 
+333 226 274             % triangle  474 , vertices  333 ,  226 ,  274 
+278 163 276             % triangle  475 , vertices  278 ,  163 ,  276 
+292 228 231             % triangle  476 , vertices  292 ,  228 ,  231 
+329 273 230             % triangle  477 , vertices  329 ,  273 ,  230 
+280 220 236             % triangle  478 , vertices  280 ,  220 ,  236 
+324 298 291             % triangle  479 , vertices  324 ,  298 ,  291 
+281 239 238             % triangle  480 , vertices  281 ,  239 ,  238 
+290 221 241             % triangle  481 , vertices  290 ,  221 ,  241 
+282 244 243             % triangle  482 , vertices  282 ,  244 ,  243 
+289 222 246             % triangle  483 , vertices  289 ,  222 ,  246 
+283 249 248             % triangle  484 , vertices  283 ,  249 ,  248 
+288 223 251             % triangle  485 , vertices  288 ,  223 ,  251 
+284 253 252             % triangle  486 , vertices  284 ,  253 ,  252 
+307 224 309             % triangle  487 , vertices  307 ,  224 ,  309 
+285 193 260             % triangle  488 , vertices  285 ,  193 ,  260 
+285 257 191             % triangle  489 , vertices  285 ,  257 ,  191 
+312 262 313             % triangle  490 , vertices  312 ,  262 ,  313 
+286 261 257             % triangle  491 , vertices  286 ,  261 ,  257 
+311 254 308             % triangle  492 , vertices  311 ,  254 ,  308 
+335 258 256             % triangle  493 , vertices  335 ,  258 ,  256 
+306 249 283             % triangle  494 , vertices  306 ,  249 ,  283 
+305 242 223             % triangle  495 , vertices  305 ,  242 ,  223 
+318 246 266             % triangle  496 , vertices  318 ,  246 ,  266 
+303 237 222             % triangle  497 , vertices  303 ,  237 ,  222 
+302 300 281             % triangle  498 , vertices  302 ,  300 ,  281 
+299 232 221             % triangle  499 , vertices  299 ,  232 ,  221 
+291 234 233             % triangle  500 , vertices  291 ,  234 ,  233 
+329 279 295             % triangle  501 , vertices  329 ,  279 ,  295 
+296 295 279             % triangle  502 , vertices  296 ,  295 ,  279 
+330 277 293             % triangle  503 , vertices  330 ,  277 ,  293 
+331 228 292             % triangle  504 , vertices  331 ,  228 ,  292 
+293 277 226             % triangle  505 , vertices  293 ,  277 ,  226 
+294 278 276             % triangle  506 , vertices  294 ,  278 ,  276 
+332 275 225             % triangle  507 , vertices  332 ,  275 ,  225 
+328 233 273             % triangle  508 , vertices  328 ,  233 ,  273 
+329 297 328             % triangle  509 , vertices  329 ,  297 ,  328 
+296 272 295             % triangle  510 , vertices  296 ,  272 ,  295 
+296 292 231             % triangle  511 , vertices  296 ,  292 ,  231 
+297 220 280             % triangle  512 , vertices  297 ,  220 ,  280 
+297 295 227             % triangle  513 , vertices  297 ,  295 ,  227 
+298 234 291             % triangle  514 , vertices  298 ,  234 ,  291 
+324 236 270             % triangle  515 , vertices  324 ,  236 ,  270 
+326 238 271             % triangle  516 , vertices  326 ,  238 ,  271 
+324 270 325             % triangle  517 , vertices  324 ,  270 ,  325 
+302 301 300             % triangle  518 , vertices  302 ,  301 ,  300 
+322 269 323             % triangle  519 , vertices  322 ,  269 ,  323 
+322 243 269             % triangle  520 , vertices  322 ,  243 ,  269 
+323 269 240             % triangle  521 , vertices  323 ,  269 ,  240 
+302 268 301             % triangle  522 , vertices  302 ,  268 ,  301 
+302 290 241             % triangle  523 , vertices  302 ,  290 ,  241 
+303 222 289             % triangle  524 , vertices  303 ,  222 ,  289 
+303 301 237             % triangle  525 , vertices  303 ,  301 ,  237 
+320 267 321             % triangle  526 , vertices  320 ,  267 ,  321 
+304 244 282             % triangle  527 , vertices  304 ,  244 ,  282 
+320 248 267             % triangle  528 , vertices  320 ,  248 ,  267 
+318 266 319             % triangle  529 , vertices  318 ,  266 ,  319 
+306 283 288             % triangle  530 , vertices  306 ,  283 ,  288 
+314 251 264             % triangle  531 , vertices  314 ,  251 ,  264 
+316 252 265             % triangle  532 , vertices  316 ,  252 ,  265 
+314 264 315             % triangle  533 , vertices  314 ,  264 ,  315 
+308 253 284             % triangle  534 , vertices  308 ,  253 ,  284 
+309 255 312             % triangle  535 , vertices  309 ,  255 ,  312 
+309 284 307             % triangle  536 , vertices  309 ,  284 ,  307 
+309 224 255             % triangle  537 , vertices  309 ,  224 ,  255 
+335 256 287             % triangle  538 , vertices  335 ,  256 ,  287 
+310 287 286             % triangle  539 , vertices  310 ,  287 ,  286 
+313 286 287             % triangle  540 , vertices  313 ,  286 ,  287 
+313 311 312             % triangle  541 , vertices  313 ,  311 ,  312 
+312 311 308             % triangle  542 , vertices  312 ,  311 ,  308 
+312 284 309             % triangle  543 , vertices  312 ,  284 ,  309 
+313 261 286             % triangle  544 , vertices  313 ,  261 ,  286 
+313 262 261             % triangle  545 , vertices  313 ,  262 ,  261 
+317 307 316             % triangle  546 , vertices  317 ,  307 ,  316 
+314 306 288             % triangle  547 , vertices  314 ,  306 ,  288 
+315 247 307             % triangle  548 , vertices  315 ,  247 ,  307 
+315 264 247             % triangle  549 , vertices  315 ,  264 ,  247 
+317 315 307             % triangle  550 , vertices  317 ,  315 ,  307 
+316 307 284             % triangle  551 , vertices  316 ,  307 ,  284 
+317 250 306             % triangle  552 , vertices  317 ,  250 ,  306 
+317 265 250             % triangle  553 , vertices  317 ,  265 ,  250 
+321 305 320             % triangle  554 , vertices  321 ,  305 ,  320 
+318 304 289             % triangle  555 , vertices  318 ,  304 ,  289 
+319 242 305             % triangle  556 , vertices  319 ,  242 ,  305 
+319 266 242             % triangle  557 , vertices  319 ,  266 ,  242 
+321 319 305             % triangle  558 , vertices  321 ,  319 ,  305 
+320 305 283             % triangle  559 , vertices  320 ,  305 ,  283 
+321 245 304             % triangle  560 , vertices  321 ,  245 ,  304 
+321 267 245             % triangle  561 , vertices  321 ,  267 ,  245 
+323 301 303             % triangle  562 , vertices  323 ,  301 ,  303 
+322 303 282             % triangle  563 , vertices  322 ,  303 ,  282 
+323 303 322             % triangle  564 , vertices  323 ,  303 ,  322 
+323 300 301             % triangle  565 , vertices  323 ,  300 ,  301 
+327 299 326             % triangle  566 , vertices  327 ,  299 ,  326 
+324 291 280             % triangle  567 , vertices  324 ,  291 ,  280 
+325 232 299             % triangle  568 , vertices  325 ,  232 ,  299 
+325 270 232             % triangle  569 , vertices  325 ,  270 ,  232 
+327 325 299             % triangle  570 , vertices  327 ,  325 ,  299 
+326 299 281             % triangle  571 , vertices  326 ,  299 ,  281 
+327 235 298             % triangle  572 , vertices  327 ,  235 ,  298 
+327 326 271             % triangle  573 , vertices  327 ,  326 ,  271 
+329 295 297             % triangle  574 , vertices  329 ,  295 ,  297 
+328 297 291             % triangle  575 , vertices  328 ,  297 ,  291 
+329 230 279             % triangle  576 , vertices  329 ,  230 ,  279 
+329 328 273             % triangle  577 , vertices  329 ,  328 ,  273 
+330 331 292             % triangle  578 , vertices  330 ,  331 ,  292 
+330 292 279             % triangle  579 , vertices  330 ,  292 ,  279 
+331 293 294             % triangle  580 , vertices  331 ,  293 ,  294 
+331 225 228             % triangle  581 , vertices  331 ,  225 ,  228 
+332 331 294             % triangle  582 , vertices  332 ,  331 ,  294 
+332 294 276             % triangle  583 , vertices  332 ,  294 ,  276 
+333 294 293             % triangle  584 , vertices  333 ,  294 ,  293 
+333 293 226             % triangle  585 , vertices  333 ,  293 ,  226 
+334 260 310             % triangle  586 , vertices  334 ,  260 ,  310 
+334 286 257             % triangle  587 , vertices  334 ,  286 ,  257 
+335 287 310             % triangle  588 , vertices  335 ,  287 ,  310 
+335 310 259             % triangle  589 , vertices  335 ,  310 ,  259 
+#
+#  dgf/irregular_grid_10m.dgf 
diff --git a/test/freeflow/shallowwater/poiseuilleflow/main.cc b/test/freeflow/shallowwater/poiseuilleflow/main.cc
new file mode 100644
index 0000000000000000000000000000000000000000..932bb3d1fb4e3f76a74eb9f8e6f0cb4e59e02c5b
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/main.cc
@@ -0,0 +1,155 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program is free software: you can redistribute it and/or modify    *
+ *   it under the terms of the GNU General Public License as published by    *
+ *   the Free Software Foundation, either version 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program is distributed in the hope that it will be useful,         *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
+ *   GNU General Public License for more details.                            *
+ *                                                                           *
+ *   You should have received a copy of the GNU General Public License       *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+
+#include <config.h>
+#include <iostream>
+
+#include <dune/common/parallel/mpihelper.hh>
+
+#include <dumux/common/properties.hh>
+#include <dumux/common/parameters.hh>
+#include <dumux/common/dumuxmessage.hh>
+
+#include <dumux/linear/linearsolvertraits.hh>
+#include <dumux/linear/amgbackend.hh>
+#include <dumux/nonlinear/newtonsolver.hh>
+#include <dumux/assembly/fvassembler.hh>
+
+#include <dumux/io/vtkoutputmodule.hh>
+
+#include <dumux/io/grid/gridmanager_yasp.hh>
+#include <dumux/io/grid/gridmanager_ug.hh>
+
+#include "properties.hh"
+
+int main(int argc, char** argv)
+{
+    using namespace Dumux;
+
+    const auto& mpiHelper = Dune::MPIHelper::instance(argc, argv);
+
+    // parse command line arguments and input file
+    Parameters::init(argc, argv);
+
+    // the property tag
+    using TypeTag = Properties::TTag::PoiseuilleFlow;
+
+    // create grid
+    GridManager<GetPropType<TypeTag, Properties::Grid>> gridManager;
+    gridManager.init();
+    const auto& leafGridView = gridManager.grid().leafGridView();
+
+    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
+    auto gridGeometry = std::make_shared<GridGeometry>(leafGridView);
+    gridGeometry->update();
+
+    // problem, in which we define the boundary and initial conditions.
+    using Problem = GetPropType<TypeTag, Properties::Problem>;
+    auto problem = std::make_shared<Problem>(gridGeometry);
+
+    using SolutionVector = GetPropType<TypeTag, Properties::SolutionVector>;
+    SolutionVector x;
+    problem->applyInitialSolution(x);
+    auto xOld = x;
+
+    using GridVariables = GetPropType<TypeTag, Properties::GridVariables>;
+    auto gridVariables = std::make_shared<GridVariables>(problem, gridGeometry);
+    gridVariables->init(x);
+
+    // We then initialize the predefined model-specific output vtk output.
+    using IOFields = GetPropType<TypeTag, Properties::IOFields>;
+
+    VtkOutputModule<GridVariables, SolutionVector> vtkWriter(*gridVariables,x, problem->name());
+    vtkWriter.addField(problem->getExactWaterDepth(), "exactWaterDepth");
+    vtkWriter.addField(problem->getExactVelocityX(), "exactVelocityX");
+    vtkWriter.addField(problem->getExactVelocityY(), "exactVelocityY");
+    problem->updateAnalyticalSolution();
+    IOFields::initOutputModule(vtkWriter);
+    vtkWriter.write(0.0);
+
+    // instantiate time loop
+    // get some time loop parameters
+    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
+    const auto tEnd = getParam<Scalar>("TimeLoop.TEnd");
+    const auto maxDt = getParam<Scalar>("TimeLoop.MaxTimeStepSize");
+    const auto dt = getParam<Scalar>("TimeLoop.DtInitial");
+    auto timeLoop = std::make_shared<CheckPointTimeLoop<Scalar>>(0, dt, tEnd);
+    timeLoop->setMaxTimeStepSize(maxDt);
+
+    if (hasParam("TimeLoop.PrintoutTimes"))
+    {
+        const auto timeLoopPrintoutTimes = getParam<std::vector<double>>("TimeLoop.PrintoutTimes");
+        timeLoop->setCheckPoint(timeLoopPrintoutTimes);
+    }
+
+    timeLoop->setCheckPoint(tEnd);
+
+    // assembler & solver
+    using Assembler = FVAssembler<TypeTag, DiffMethod::numeric>;
+    auto assembler = std::make_shared<Assembler>(problem, gridGeometry, gridVariables, timeLoop, xOld);
+
+    using LinearSolver = AMGBiCGSTABBackend<LinearSolverTraits<GridGeometry>>;
+    auto linearSolver = std::make_shared<LinearSolver>(leafGridView, gridGeometry->dofMapper());
+
+    using NewtonSolver = Dumux::NewtonSolver<Assembler, LinearSolver>;
+    NewtonSolver nonLinearSolver(assembler, linearSolver);
+
+    // time loop
+    timeLoop->start(); do
+    {
+        nonLinearSolver.solve(x, *timeLoop);
+
+        // update the analytical solution
+        problem->updateAnalyticalSolution();
+
+        // make the new solution the old solution
+        xOld = x;
+        gridVariables->advanceTimeStep();
+
+        // advance to the time loop to the next step
+        timeLoop->advanceTimeStep();
+
+        // write vtk output
+        if (timeLoop->isCheckPoint())
+            vtkWriter.write(timeLoop->time());
+
+        // report statistics of this time step
+        timeLoop->reportTimeStep();
+
+        // set new dt as suggested by newton controller
+        timeLoop->setTimeStepSize(nonLinearSolver.suggestTimeStepSize(timeLoop->timeStepSize()));
+
+
+    } while (!timeLoop->finished());
+
+    timeLoop->finalize(leafGridView.comm());
+
+    ////////////////////////////////////////////////////////////
+    // finalize, print dumux message to say goodbye
+    ////////////////////////////////////////////////////////////
+
+    // print dumux end message
+    if (mpiHelper.rank() == 0)
+    {
+        Parameters::print();
+        DumuxMessage::print(/*firstCall=*/false);
+    }
+
+    return 0;
+}
diff --git a/test/freeflow/shallowwater/poiseuilleflow/params.input b/test/freeflow/shallowwater/poiseuilleflow/params.input
new file mode 100755
index 0000000000000000000000000000000000000000..d513f42c9a96b0aaa8cab00401c7200b3f674770
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/params.input
@@ -0,0 +1,25 @@
+[Problem]
+Name = poiseuilleflow
+BedSlope = 0.00005 # [-] slope of the bed in m/m (positive downwards)
+Gravity = 9.81 # [m/s^2] gravitational acceleration
+Discharge = -4.0875 # [m^2/s] discharge per meter at the inflow boundary
+HBoundary = 10.0 # [m] water depth at the ouflow boundary
+EnableViscousFlux = true
+TurbulentViscosity = 0.1 # [m^2/s] turbulent viscosity
+WallFrictionLaw = noslip # Type of wall friction law: "noslip" or "nikuradse"
+AlphaWall = 1.0 # [-] wall roughness parameter; alphaWall=0 : full slip, 0<alphaWall<1 : partial slip, alphaWall=1 : no slip
+KsWall = 50.0 # [m] wall roughness height (Nikuradse equivalent)
+
+[TimeLoop]
+TEnd = 2880.0 # [s]
+MaxTimeStepSize = 120.0 # [s]
+DtInitial = 1.0 # [s]
+PrintoutTimes = 180 360 720 980 1440 2160 2880
+
+[Grid]
+LowerLeft = 0.0 -50.0
+UpperRight = 400.0 50.0
+Cells = 20 20
+
+[Newton]
+EnablePartialReassembly = true
diff --git a/test/freeflow/shallowwater/poiseuilleflow/problem.hh b/test/freeflow/shallowwater/poiseuilleflow/problem.hh
new file mode 100644
index 0000000000000000000000000000000000000000..eba86644aa90f25c76c2fb976b0159f358784283
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/problem.hh
@@ -0,0 +1,375 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program is free software: you can redistribute it and/or modify    *
+ *   it under the terms of the GNU General Public License as published by    *
+ *   the Free Software Foundation, either version 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program is distributed in the hope that it will be useful,         *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
+ *   GNU General Public License for more details.                            *
+ *                                                                           *
+ *   You should have received a copy of the GNU General Public License       *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+
+#ifndef DUMUX_POISEUILLE_FLOW_TEST_PROBLEM_HH
+#define DUMUX_POISEUILLE_FLOW_TEST_PROBLEM_HH
+
+#include <dumux/common/properties.hh>
+#include <dumux/common/parameters.hh>
+#include <dumux/freeflow/shallowwater/problem.hh>
+#include <dumux/freeflow/shallowwater/boundaryfluxes.hh>
+
+#include <algorithm>
+#include <cctype>
+
+namespace Dumux {
+
+/*!
+ * \ingroup ShallowWaterTests
+ * \brief A simple test for the 2D flow in a channel with rough side walls (Poiseuille flow).
+ *
+ * The domain has a length L =  400 meters long and a width W = 100 meters.
+ * The domain extent is from (x,y) = (0.0, -50.0) to (400.0, 50.0), i.e. the channel centreline is at y = 0.
+ * The bed level is sloped from z = -9.98 (x = 0) to z = -10.0 meters (x = L).
+ * The initital water depth corresponds to the analytical solution:
+ * having a slope equal to \f$ ib = d \Theta / L \f$ , where \f$ d \Theta \f$ is the water level difference between upstream and downstream: \f$ d \Theta \f$ = 0.02 m (positive downwards).
+ * With L = 400 m, the slope is ib = 0.00005 m/m, resulting in a constant water depth along the channel of H = 10.0 m.
+
+ * At the west/left  (inflow)  boundary a discharge is prescribed of \f$ Q_{in} = -408.75 m^3/s \f$ or \f$ q_{in} = 4.0875 m^2/s \f$ per meter.
+ * At the east/right (outflow) boundary a fixed water level is prescribed of \f$ \Theta \f$ = 0.0 m.
+ * The south and north boundaries are set to roughwall type boundaries,
+ * with a coefficient alphaWall = 1.0, where:
+ *      alphaWall = 0.0: full    slip (smooth wall)
+ * 0.0 <alphaWall < 1.0: partial slip (partially-rough wall)
+ *      alphaWall = 1.0: no      slip (fully-rough wall)
+ * Additionally these (south and north) boundaries are (automatically) set to no-flow boundaries.
+
+ * The flow in the channel experiences two forces:
+ * 1) the pressure gradient, driving the flow downstream
+ * 2) the wall roughness,
+
+ * It can be verified that this force balance reduces the momentum equation in X-direction to:
+ *
+  \f[
+  \frac{\partial p}{\partial x} = \nu_T \frac{\partial^2 u}{\partial y^2}
+  \f]
+ * where \f$ \nu_T \f$ is the turbulent viscosity.
+ *
+ * This ordinary differential equation can be solved (applying the boundary conditions to obtain the integration constants),
+ * resulting in a parabolic velocity profile in lateral direction (over the width of the channel):
+ *
+  \f[
+  u(y) = \frac{g d \Theta}{8 \nu_T L} \left(4y^2 - W^2\right)
+  \f]
+ *
+ * where y the coordinate in lateral direction.
+ * The velocity has a maximum value at y = 0:
+  \f[
+  u_{max} = \frac{g d \Theta W^2}{8 \nu_T L}
+  \f]
+ *
+ * Therefore \f$ u_{max} \f$ can be calculated to be:
+ *
+  \f[
+  u_{max} = \frac{9.81*0.02*100^2}{8*0.1*400} = 6.13125 m/s
+  \f]
+ *
+  The formula for \f$ u(y) \f$ is also used to calculate the analytic solution.
+ * It should be noted that u = f(x) and that v = 0 in the whole domain (in the final steady state).
+ * Therefore the momentum advection/convection terms should be zero for this test, as:
+ * \f$ u \partial u / \partial x = v \partial u / \partial y = u \partial v / \partial x = v \partial v / \partial y = 0 \f$
+ *
+ * This problem uses the \ref ShallowWaterModel
+ */
+template<class TypeTag>
+class PoiseuilleFlowProblem
+: public ShallowWaterProblem<TypeTag>
+{
+    using ParentType = ShallowWaterProblem<TypeTag>;
+    using PrimaryVariables = GetPropType<TypeTag, Properties::PrimaryVariables>;
+    using BoundaryTypes = Dumux::BoundaryTypes<GetPropType<TypeTag, Properties::ModelTraits>::numEq()>;
+    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
+    using Indices = typename GetPropType<TypeTag, Properties::ModelTraits>::Indices;
+    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
+    using NeumannFluxes = GetPropType<TypeTag, Properties::NumEqVector>;
+    using ElementVolumeVariables = typename GetPropType<TypeTag, Properties::GridVolumeVariables>::LocalView;
+    using GridVariables = GetPropType<TypeTag, Properties::GridVariables>;
+    using ElementFluxVariablesCache = typename GridVariables::GridFluxVariablesCache::LocalView;
+    using VolumeVariables = typename ElementVolumeVariables::VolumeVariables;
+    using FVElementGeometry = typename GetPropType<TypeTag, Properties::GridGeometry>::LocalView;
+    using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace;
+    using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView;
+    using Element = typename GridView::template Codim<0>::Entity;
+    using GlobalPosition = typename Element::Geometry::GlobalCoordinate;
+    using NumEqVector = GetPropType<TypeTag, Properties::NumEqVector>;
+    using SubControlVolume = typename FVElementGeometry::SubControlVolume;
+
+public:
+    PoiseuilleFlowProblem(std::shared_ptr<const GridGeometry> gridGeometry)
+    : ParentType(gridGeometry)
+    {
+        name_ = getParam<std::string>("Problem.Name");
+        exactWaterDepth_.resize(gridGeometry->numDofs(), 0.0);
+        exactVelocityX_.resize(gridGeometry->numDofs(), 0.0);
+        exactVelocityY_.resize(gridGeometry->numDofs(), 0.0);
+        bedSlope_ = getParam<Scalar>("Problem.BedSlope");
+        discharge_ = getParam<Scalar>("Problem.Discharge");
+        hBoundary_ = getParam<Scalar>("Problem.HBoundary");
+        enableViscousFlux_ = getParam<bool>("Problem.EnableViscousFlux", false);
+        turbViscosity_ = getParam<Scalar>("Problem.TurbulentViscosity");
+        alphaWall_ = getParam<Scalar>("Problem.AlphaWall");
+        ksWall_ = getParam<Scalar>("Problem.KsWall");
+        wallFrictionLawType_ = getParam<std::string>("Problem.WallFrictionLaw");
+        // Make the wallFrictionLawType_ lower case
+        std::transform(wallFrictionLawType_.begin(), wallFrictionLawType_.end(), wallFrictionLawType_.begin(), [](unsigned char c){ return std::tolower(c); });
+    }
+
+    //! Get the analytical water depth
+    const std::vector<Scalar>& getExactWaterDepth() const
+    { return exactWaterDepth_; }
+
+    //! Get the analytical U-velocity
+    const std::vector<Scalar>& getExactVelocityX() const
+    { return exactVelocityX_; }
+
+    //! Get the analytical V-velocity
+    const std::vector<Scalar>& getExactVelocityY() const
+    { return exactVelocityY_; }
+
+    //! Update the analytical solution
+    void updateAnalyticalSolution()
+    {
+        for (const auto& element : elements(this->gridGeometry().gridView()))
+        {
+            const auto eIdx = this->gridGeometry().elementMapper().index(element);
+            const auto& globalPos = element.geometry().center();
+            const auto gravity = this->spatialParams().gravity(globalPos);
+            const Scalar y = globalPos[1];
+            const Scalar width = this->gridGeometry().bBoxMax()[1] - this->gridGeometry().bBoxMin()[1];
+            const Scalar h = hBoundary_;
+            const Scalar u = -(gravity*bedSlope_/(8.0*turbViscosity_)) * (4.0*y*y - width*width);
+            exactWaterDepth_[eIdx] = h;
+            exactVelocityX_[eIdx]  = u;
+            exactVelocityY_[eIdx]  = 0.0;
+        }
+    }
+
+    const std::string& name() const
+    { return name_; }
+
+    /*!
+     * \name Boundary conditions
+     */
+    // \{
+
+    /*!
+     * \brief Specifies which kind of boundary condition should be
+     *        used for which equation on a given boundary segment.
+     *
+     * \param globalPos The position for which the boundary type is set
+     */
+    BoundaryTypes boundaryTypesAtPos(const GlobalPosition &globalPos) const
+    {
+        BoundaryTypes bcTypes;
+        bcTypes.setAllNeumann();
+        return bcTypes;
+    }
+
+    /*!
+     * \brief Specifies the neumann boundary
+     *
+     *  We need the Riemann invariants to compute the values depending of the boundary type.
+     *  Since we use a weak imposition we do not have a dirichlet value. We impose fluxes
+     *  based on q, h, etc. computed with the Riemann invariants
+     */
+    NeumannFluxes neumann(const Element& element,
+                          const FVElementGeometry& fvGeometry,
+                          const ElementVolumeVariables& elemVolVars,
+                          const ElementFluxVariablesCache& elemFluxVarsCache,
+                          const SubControlVolumeFace& scvf) const
+    {
+        NeumannFluxes values(0.0);
+
+        const auto& insideScv = fvGeometry.scv(scvf.insideScvIdx());
+        const auto& insideVolVars = elemVolVars[insideScv];
+        const auto& unitNormal = scvf.unitOuterNormal();
+        const auto gravity = this->spatialParams().gravity(scvf.center());
+        std::array<Scalar, 3> boundaryStateVariables;
+
+        // impose discharge at the left side
+        if (scvf.center()[0] < this->gridGeometry().bBoxMin()[0] + eps_)
+        {
+            // Prescribe the exact q-distribution long the inflow boundaryStateVariables
+            // based on the parabolic u-profile:
+            // q(y) = (g*H*ib/(8*nu_T)) * (4*y^2^-W^2)
+            // Note the opposite sign to the velocity u, due to the fact that it is an inflow discharge
+            const auto y     = scvf.center()[1];
+            const auto width = this->gridGeometry().bBoxMax()[1] - this->gridGeometry().bBoxMin()[1];
+            const auto h     = hBoundary_;
+            // Now compute a weighted average between the constant q (from input) and the parabolic q from the analytical solution
+            // based on the prescribed alphaWall
+            const auto q_in0 = (gravity*h*bedSlope_/(8.0*turbViscosity_)) * (4.0*y*y - width*width);
+            const auto q_in1 = discharge_;
+            const auto q_in  = (1.0-alphaWall_)*q_in1 + alphaWall_*q_in0;
+            boundaryStateVariables = ShallowWater::fixedDischargeBoundary(q_in,
+                                                                          insideVolVars.waterDepth(),
+                                                                          insideVolVars.velocity(0),
+                                                                          insideVolVars.velocity(1),
+                                                                          gravity,
+                                                                          unitNormal);
+        }
+        // impose water depth at the right side
+        else if (scvf.center()[0] > this->gridGeometry().bBoxMax()[0] - eps_)
+        {
+            boundaryStateVariables =  ShallowWater::fixedWaterDepthBoundary(hBoundary_,
+                                                                            insideVolVars.waterDepth(),
+                                                                            insideVolVars.velocity(0),
+                                                                            insideVolVars.velocity(1),
+                                                                            gravity,
+                                                                            unitNormal);
+        }
+        // no flow boundary
+        else
+        {
+            // For the rough side walls of type no-slip we prescribe a slip condition based on alphaWall
+            // for smooth closed walls we prescribed a full-slip condition (zero-roughness)
+
+            // Get inside velocity components in cell face coordinates (t,n) using normal vector unitNormal
+            // Note that the first component is the normal component
+            // since we are rotating to the normal vector coordinate system
+            const Scalar insideVelocityNWall =  insideVolVars.velocity(0)*unitNormal[0] + insideVolVars.velocity(1)*unitNormal[1];
+            const Scalar insideVelocityTWall = -insideVolVars.velocity(0)*unitNormal[1] + insideVolVars.velocity(1)*unitNormal[0];
+
+            // Initialisation of outside velocities
+            auto outsideVelocityNWall = insideVelocityNWall;
+            auto outsideVelocityTWall = insideVelocityTWall;
+
+            // Now set the outside (ghost cell) velocities based on the chosen slip condition
+            if ((scvf.center()[1] < this->gridGeometry().bBoxMin()[1] + eps_ || scvf.center()[1] > this->gridGeometry().bBoxMax()[1] - eps_) && (wallFrictionLawType_ == "noslip" || wallFrictionLawType_ == "nikuradse"))
+            {
+                // Set the outside state using the no-slip wall roughness conditions based on alphaWall
+                // alphaWall = 0.0: full slip (wall tangential velocity equals inside tangential velocity)
+                // alphaWall = 1.0: no slip (wall tangential velocity=0.0: point mirroring of the velocity)
+                // 0.0 < alphaWall < 1.0: 'partial' slip.
+                // e.g. for alphaWall = 0.5 the wall tangential velocity is half the inside tangential velocity.
+                outsideVelocityNWall = -insideVelocityNWall;
+                outsideVelocityTWall =  (1.0 - 2.0*alphaWall_)*insideVelocityTWall;
+            }
+            else
+            {
+                // Set the outside state using the full-slip wall roughness conditions (line mirroring in the boundary face)
+                // Only mirror the normal component
+                outsideVelocityNWall = -insideVelocityNWall;
+                outsideVelocityTWall =  insideVelocityTWall;
+            }
+            // Rotate back to cartesian coordinate system
+            const Scalar outsideVelocityXWall = outsideVelocityNWall*unitNormal[0] - outsideVelocityTWall*unitNormal[1];
+            const Scalar outsideVelocityYWall = outsideVelocityNWall*unitNormal[1] + outsideVelocityTWall*unitNormal[0];
+
+            boundaryStateVariables[0] = insideVolVars.waterDepth();
+            boundaryStateVariables[1] = outsideVelocityXWall;
+            boundaryStateVariables[2] = outsideVelocityYWall;
+
+        }
+
+        auto riemannFlux = ShallowWater::riemannProblem(insideVolVars.waterDepth(),
+                                                        boundaryStateVariables[0],
+                                                        insideVolVars.velocity(0),
+                                                        boundaryStateVariables[1],
+                                                        insideVolVars.velocity(1),
+                                                        boundaryStateVariables[2],
+                                                        insideVolVars.bedSurface(),
+                                                        insideVolVars.bedSurface(),
+                                                        gravity,
+                                                        unitNormal);
+
+        values[Indices::massBalanceIdx] = riemannFlux[0];
+        values[Indices::velocityXIdx] = riemannFlux[1];
+        values[Indices::velocityYIdx] = riemannFlux[2];
+
+        // Addition of viscosity/diffusive flux rough wall boundaries
+        // No-slip wall (with coefficient alphaWall):
+        // Compute wall shear stress using turbulent viscosity and local velocity gradient
+        // Assume velocity gradient (in cell adjacent to wall) equal to alphaWall*(0 - u_c)
+        std::array<Scalar, 3> roughWallFlux{};
+        if (scvf.center()[1] < this->gridGeometry().bBoxMin()[1] + eps_ || scvf.center()[1] > this->gridGeometry().bBoxMax()[1] - eps_)
+        {
+            // Distance vector between the inside cell center and the boundary face center
+            const auto& cellCenterToBoundaryFaceCenter = scvf.center() - insideScv.center();
+
+            // The left (inside) state vector
+            const auto& leftState  = insideVolVars.priVars();
+
+            if (wallFrictionLawType_ == "noslip")
+            {
+                roughWallFlux = ShallowWater::noslipWallBoundary(alphaWall_,
+                                                                 turbViscosity_,
+                                                                 leftState,
+                                                                 cellCenterToBoundaryFaceCenter,
+                                                                 unitNormal);
+            }
+            else if (wallFrictionLawType_ == "nikuradse")
+            {
+                roughWallFlux = ShallowWater::nikuradseWallBoundary(ksWall_,
+                                                                    leftState,
+                                                                    cellCenterToBoundaryFaceCenter,
+                                                                    unitNormal);
+            }
+        }
+
+        values[Indices::massBalanceIdx] += roughWallFlux[0];
+        values[Indices::velocityXIdx] += roughWallFlux[1];
+        values[Indices::velocityYIdx] += roughWallFlux[2];
+
+        return values;
+    }
+
+    // \}
+
+    /*!
+     * \brief Evaluate the initial values for a control volume.
+     * \param globalPos The position for which the boundary type is set
+     */
+    PrimaryVariables initialAtPos(const GlobalPosition &globalPos) const
+    {
+        PrimaryVariables values(0.0);
+
+        // Set the initial values to the analytical solution
+        const auto gravity = this->spatialParams().gravity(globalPos);
+        const auto width = this->gridGeometry().bBoxMax()[1] - this->gridGeometry().bBoxMin()[1];
+
+        values[0] = hBoundary_;
+        values[1] = -(gravity*bedSlope_/(8.0*turbViscosity_)) * (4.0*globalPos[1]*globalPos[1] - width*width);
+        values[2] = 0.0;
+
+        return values;
+    };
+
+private:
+
+    std::vector<Scalar> exactWaterDepth_;
+    std::vector<Scalar> exactVelocityX_;
+    std::vector<Scalar> exactVelocityY_;
+
+    Scalar hBoundary_; // water level at the outflow boundary
+    Scalar bedSlope_; // bed slope (positive downwards)
+    Scalar discharge_; // discharge at the inflow boundary
+    Scalar alphaWall_; // wall roughness coefficient for no-slip type wall roughness
+    Scalar ksWall_; // Nikuradse wall roughness height for Nikuradse type wall roughness
+    bool enableViscousFlux_; // switch for enabling viscous (turbulent) momentum flux computation
+    Scalar turbViscosity_; // turbulent viscosity
+    std::string wallFrictionLawType_; // wall friction law type
+
+    static constexpr Scalar eps_ = 1.0e-6;
+    std::string name_;
+};
+
+} //end namespace Dumux
+
+#endif
diff --git a/test/freeflow/shallowwater/poiseuilleflow/properties.hh b/test/freeflow/shallowwater/poiseuilleflow/properties.hh
new file mode 100644
index 0000000000000000000000000000000000000000..7a1312806db3f73387c050b11cdf0a10f45eb37b
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/properties.hh
@@ -0,0 +1,68 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program is free software: you can redistribute it and/or modify    *
+ *   it under the terms of the GNU General Public License as published by    *
+ *   the Free Software Foundation, either version 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program is distributed in the hope that it will be useful,         *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
+ *   GNU General Public License for more details.                            *
+ *                                                                           *
+ *   You should have received a copy of the GNU General Public License       *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+
+#ifndef DUMUX_POISEUILLE_FLOW_TEST_PROPERTIES_HH
+#define DUMUX_POISEUILLE_FLOW_TEST_PROPERTIES_HH
+
+#include <dumux/common/properties.hh>
+#include <dumux/freeflow/shallowwater/model.hh>
+#include <dumux/discretization/cctpfa.hh>
+
+#if HAVE_UG
+#include <dune/grid/uggrid.hh>
+#else
+#include <dune/grid/yaspgrid.hh>
+#endif
+
+#include "problem.hh"
+#include "spatialparams.hh"
+
+namespace Dumux::Properties {
+
+namespace TTag {
+struct PoiseuilleFlow { using InheritsFrom = std::tuple<ShallowWater, CCTpfaModel>; };
+} // namespace TTag
+
+template<class TypeTag>
+struct Grid<TypeTag, TTag::PoiseuilleFlow> { using type = GRIDTYPE; };
+
+template<class TypeTag>
+struct Problem<TypeTag, TTag::PoiseuilleFlow> { using type = Dumux::PoiseuilleFlowProblem<TypeTag> ; };
+
+template<class TypeTag>
+struct SpatialParams<TypeTag, TTag::PoiseuilleFlow>
+{
+private:
+    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
+    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
+    using ElementVolumeVariables = typename GetPropType<TypeTag, Properties::GridVolumeVariables>::LocalView;
+    using VolumeVariables = typename ElementVolumeVariables::VolumeVariables;
+
+public:
+    using type = PoiseuilleFlowSpatialParams<GridGeometry, Scalar, VolumeVariables>;
+};
+
+template<class TypeTag>
+struct EnableGridVolumeVariablesCache<TypeTag, TTag::PoiseuilleFlow> { static constexpr bool value = false; };
+template<class TypeTag>
+struct EnableGridGeometryCache<TypeTag, TTag::PoiseuilleFlow> { static constexpr bool value = true; };
+
+} // end namespace Dumux::Properties
+
+#endif
diff --git a/test/freeflow/shallowwater/poiseuilleflow/spatialparams.hh b/test/freeflow/shallowwater/poiseuilleflow/spatialparams.hh
new file mode 100644
index 0000000000000000000000000000000000000000..eb35e02a1f3dfef7566f3b49250d379054430ad6
--- /dev/null
+++ b/test/freeflow/shallowwater/poiseuilleflow/spatialparams.hh
@@ -0,0 +1,93 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program is free software: you can redistribute it and/or modify    *
+ *   it under the terms of the GNU General Public License as published by    *
+ *   the Free Software Foundation, either version 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program is distributed in the hope that it will be useful,         *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of          *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
+ *   GNU General Public License for more details.                            *
+ *                                                                           *
+ *   You should have received a copy of the GNU General Public License       *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+/*!
+ * \file
+ * \ingroup ShallowWaterTests
+ * \brief The spatial parameters for the Poiseuille flow problem.
+ */
+#ifndef DUMUX_POISEUILLE_FLOW_SPATIAL_PARAMETERS_HH
+#define DUMUX_POISEUILLE_FLOW_SPATIAL_PARAMETERS_HH
+
+#include <dumux/common/exceptions.hh>
+#include <dumux/common/parameters.hh>
+
+#include <dumux/material/spatialparams/fv.hh>
+#include <dumux/material/fluidmatrixinteractions/frictionlaws/frictionlaw.hh>
+
+namespace Dumux {
+
+/*!
+ * \ingroup ShallowWaterTests
+ * \brief The spatial parameters class for the Poiseuille flow test.
+ *
+ */
+template<class GridGeometry, class Scalar, class VolumeVariables>
+class PoiseuilleFlowSpatialParams
+: public FVSpatialParams<GridGeometry, Scalar,
+                         PoiseuilleFlowSpatialParams<GridGeometry, Scalar, VolumeVariables>>
+{
+    using ThisType = PoiseuilleFlowSpatialParams<GridGeometry, Scalar, VolumeVariables>;
+    using ParentType = FVSpatialParams<GridGeometry, Scalar, ThisType>;
+    using GridView = typename GridGeometry::GridView;
+    using FVElementGeometry = typename GridGeometry::LocalView;
+    using SubControlVolume = typename FVElementGeometry::SubControlVolume;
+    using Element = typename GridView::template Codim<0>::Entity;
+    using GlobalPosition = typename Element::Geometry::GlobalCoordinate;
+
+public:
+    PoiseuilleFlowSpatialParams(std::shared_ptr<const GridGeometry> gridGeometry)
+    : ParentType(gridGeometry)
+    {
+        gravity_ = getParam<Scalar>("Problem.Gravity");
+        bedSlope_ = getParam<Scalar>("Problem.BedSlope");
+        hBoundary_ = getParam<Scalar>("Problem.HBoundary");
+    }
+
+    Scalar gravity(const GlobalPosition& globalPos) const
+    { return gravity_; }
+
+    Scalar gravity() const
+    { return gravity_; }
+
+    const FrictionLaw<VolumeVariables>&
+    frictionLaw(const Element& element, const SubControlVolume& scv) const
+    {
+        DUNE_THROW(Dune::NotImplemented, "No friction law is implemented for this test!");
+    }
+
+    //! Define the bed surface
+    Scalar bedSurface(const Element& element, const SubControlVolume& scv) const
+    {
+        const Scalar length = this->gridGeometry().bBoxMax()[0] - this->gridGeometry().bBoxMin()[0];
+        // The bed level sloped downwards from the left boundary to the right boundary
+        // The water level boundary condition hBoundary_ is specified at the right boundary
+        const Scalar leftBedLevel = - hBoundary_ + length*bedSlope_;
+        // todo depends on index e.g. eIdx = scv.elementIndex();
+        return leftBedLevel - element.geometry().center()[0] * bedSlope_;
+    }
+
+private:
+    Scalar gravity_;
+    Scalar bedSlope_;
+    Scalar hBoundary_;
+};
+
+} // end namespace Dumux
+
+#endif
diff --git a/test/references/test_ff_shallowwater_poiseuilleflow-reference.vtu b/test/references/test_ff_shallowwater_poiseuilleflow-reference.vtu
new file mode 100755
index 0000000000000000000000000000000000000000..1daf0b2a45b62437a91440f281dab5cfa06f7b03
--- /dev/null
+++ b/test/references/test_ff_shallowwater_poiseuilleflow-reference.vtu
@@ -0,0 +1,658 @@
+<?xml version="1.0"?>
+<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian">
+  <UnstructuredGrid>
+    <Piece NumberOfCells="400" NumberOfPoints="441">
+      <CellData Scalars="waterDepth">
+        <DataArray type="Float32" Name="waterDepth" NumberOfComponents="1" format="ascii">
+          10.0438 10.0389 10.0346 10.0307 10.0269 10.0235 10.0203 10.0173 10.0146 10.0122 10.0099 10.0079
+          10.0061 10.0046 10.0032 10.0021 10.0012 10.0006 10.0002 10.0001 10.0384 10.034 10.0301 10.0264
+          10.023 10.0198 10.0169 10.0142 10.0117 10.0095 10.0074 10.0056 10.004 10.0027 10.0015 10.0006
+          9.99996 9.9996 9.99956 9.99989 10.0382 10.0337 10.0298 10.0261 10.0227 10.0195 10.0165 10.0139
+          10.0114 10.0092 10.0072 10.0054 10.0038 10.0024 10.0013 10.0005 9.99986 9.99954 9.99954 9.99991
+          10.0381 10.0336 10.0297 10.026 10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053
+          10.0038 10.0024 10.0013 10.0005 9.99986 9.99955 9.99956 9.99994 10.0381 10.0336 10.0297 10.026
+          10.0226 10.0194 10.0165 10.0138 10.0113 10.0091 10.0071 10.0053 10.0038 10.0024 10.0013 10.0005
+          9.99987 9.99957 9.99959 9.99997 10.0381 10.0336 10.0297 10.026 10.0226 10.0194 10.0165 10.0138
+          10.0113 10.0091 10.0071 10.0053 10.0038 10.0024 10.0013 10.0005 9.99989 9.9996 9.99962 10
+          10.0381 10.0336 10.0297 10.026 10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053
+          10.0038 10.0024 10.0013 10.0005 9.99991 9.99962 9.99965 10 10.038 10.0335 10.0297 10.026
+          10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053 10.0038 10.0025 10.0014 10.0005
+          9.99993 9.99964 9.99968 10.0001 10.038 10.0335 10.0297 10.026 10.0226 10.0194 10.0165 10.0138
+          10.0114 10.0091 10.0071 10.0053 10.0038 10.0025 10.0014 10.0005 9.99994 9.99965 9.99969 10.0001
+          10.038 10.0335 10.0297 10.026 10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053
+          10.0038 10.0025 10.0014 10.0005 9.99994 9.99966 9.9997 10.0001 10.038 10.0335 10.0297 10.026
+          10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053 10.0038 10.0025 10.0014 10.0005
+          9.99994 9.99966 9.9997 10.0001 10.038 10.0335 10.0297 10.026 10.0226 10.0194 10.0165 10.0138
+          10.0114 10.0091 10.0071 10.0053 10.0038 10.0025 10.0014 10.0005 9.99994 9.99965 9.99969 10.0001
+          10.038 10.0335 10.0297 10.026 10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053
+          10.0038 10.0025 10.0014 10.0005 9.99993 9.99964 9.99968 10.0001 10.0381 10.0336 10.0297 10.026
+          10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053 10.0038 10.0024 10.0013 10.0005
+          9.99991 9.99962 9.99965 10 10.0381 10.0336 10.0297 10.026 10.0226 10.0194 10.0165 10.0138
+          10.0113 10.0091 10.0071 10.0053 10.0038 10.0024 10.0013 10.0005 9.99989 9.9996 9.99962 10
+          10.0381 10.0336 10.0297 10.026 10.0226 10.0194 10.0165 10.0138 10.0113 10.0091 10.0071 10.0053
+          10.0038 10.0024 10.0013 10.0005 9.99987 9.99957 9.99959 9.99997 10.0381 10.0336 10.0297 10.026
+          10.0226 10.0194 10.0165 10.0138 10.0114 10.0091 10.0071 10.0053 10.0038 10.0024 10.0013 10.0005
+          9.99986 9.99955 9.99956 9.99994 10.0382 10.0337 10.0298 10.0261 10.0227 10.0195 10.0165 10.0139
+          10.0114 10.0092 10.0072 10.0054 10.0038 10.0024 10.0013 10.0005 9.99986 9.99954 9.99954 9.99991
+          10.0384 10.034 10.0301 10.0264 10.023 10.0198 10.0169 10.0142 10.0117 10.0095 10.0074 10.0056
+          10.004 10.0027 10.0015 10.0006 9.99996 9.9996 9.99956 9.99989 10.0438 10.0389 10.0346 10.0307
+          10.0269 10.0235 10.0203 10.0173 10.0146 10.0122 10.0099 10.0079 10.0061 10.0046 10.0032 10.0021
+          10.0012 10.0006 10.0002 10.0001
+        </DataArray>
+        <DataArray type="Float32" Name="velocityX" NumberOfComponents="1" format="ascii">
+          0.570598 0.532182 0.495822 0.461666 0.429639 0.399645 0.371588 0.345378 0.320932 0.298179 0.27706 0.257532
+          0.239574 0.223194 0.208433 0.195379 0.18418 0.175056 0.168326 0.164422 1.69356 1.69586 1.69738 1.69846
+          1.6992 1.69964 1.69984 1.69985 1.6997 1.69944 1.6991 1.69871 1.69831 1.69793 1.69761 1.69736
+          1.6972 1.69713 1.69709 1.69697 2.67225 2.67727 2.6817 2.68582 2.68967 2.69325 2.69657 2.69964
+          2.70248 2.70508 2.70746 2.70963 2.71158 2.71331 2.71484 2.71614 2.71719 2.71797 2.71844 2.71852
+          3.52806 3.53408 3.53948 3.54456 3.54932 3.55379 3.55796 3.56185 3.56546 3.5688 3.57187 3.57468
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diff --git a/test/references/test_ff_shallowwater_poiseuilleflow_unstructured-reference.vtu b/test/references/test_ff_shallowwater_poiseuilleflow_unstructured-reference.vtu
new file mode 100755
index 0000000000000000000000000000000000000000..2c3c0a8373e062785628f9b3a1edc9b15468f5a3
--- /dev/null
+++ b/test/references/test_ff_shallowwater_poiseuilleflow_unstructured-reference.vtu
@@ -0,0 +1,821 @@
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