diff --git a/dumux/porousmediumflow/velocity.hh b/dumux/porousmediumflow/velocity.hh
index 5531251ccb7729792447e80a7fcd7f816c546691..8ef2c6dadfc4c4e8de0452a647de51e55a15531a 100644
--- a/dumux/porousmediumflow/velocity.hh
+++ b/dumux/porousmediumflow/velocity.hh
@@ -26,6 +26,7 @@
#define DUMUX_POROUSMEDIUMFLOW_VELOCITY_HH
#include <vector>
+#include <dumux/flux/traits.hh>
#include <dune/common/fvector.hh>
#include <dune/common/float_cmp.hh>
@@ -57,11 +58,14 @@ class PorousMediumFlowVelocity
using ElementVolumeVariables = typename GridVolumeVariables::LocalView;
using FluidSystem = typename VolumeVariables::FluidSystem;
using Scalar = typename GridVariables::Scalar;
+ using FluxTraits = typename Dumux::FluxTraits<FluxVariables>;
+ using AdvectionType = typename FluxVariables::AdvectionType;
static constexpr int dim = GridView::dimension;
static constexpr int dimWorld = GridView::dimensionworld;
static constexpr bool isBox = GridGeometry::discMethod == DiscretizationMethod::box;
static constexpr int dofCodim = isBox ? dim : 0;
+ static constexpr bool stationaryVelocityField = FluxTraits::hasStationaryVelocityField();
using GlobalPosition = typename Element::Geometry::GlobalCoordinate;
using ReferenceElements = Dune::ReferenceElements<typename GridView::ctype, dim>;
@@ -282,21 +286,36 @@ public:
auto bcTypes = problemBoundaryTypes_(element, scvf);
if (bcTypes.hasNeumann())
{
- // check if we have Neumann no flow, we can just use 0
- const auto neumannFlux = Deprecated::neumann(problem_, element, fvGeometry, elemVolVars, elemFluxVarsCache, scvf);
- using NumEqVector = std::decay_t<decltype(neumannFlux)>;
- if (Dune::FloatCmp::eq<NumEqVector, Dune::FloatCmp::CmpStyle::absolute>(neumannFlux, NumEqVector(0.0), 1e-30))
- scvfFluxes[scvfIndexInInside[localScvfIdx]] = 0;
- // cubes
- else if (dim == 1 || geomType.isCube())
+ // for stationary velocity fields we can easily compute the correct velocity
+ // this special treatment makes sure that the velocity field is also correct on Neumann boundaries
+ // of tracer problems where the velocity field is given.
+ // (For Dirichlet boundaries no special treatment is necessary.)
+ if (stationaryVelocityField)
{
- const auto fIdx = scvfIndexInInside[localScvfIdx];
- const auto fIdxOpposite = fIdx%2 ? fIdx-1 : fIdx+1;
- scvfFluxes[fIdx] = -scvfFluxes[fIdxOpposite];
+ const auto flux = AdvectionType::flux(problem_, element, fvGeometry, elemVolVars,
+ scvf, phaseIdx, elemFluxVarsCache);
+
+ const auto& insideVolVars = elemVolVars[scvf.insideScvIdx()];
+ scvfFluxes[scvfIndexInInside[localScvfIdx]] += flux / insideVolVars.extrusionFactor();
+ }
+ else
+ {
+ // check if we have Neumann no flow, we can just use 0
+ const auto neumannFlux = Deprecated::neumann(problem_, element, fvGeometry, elemVolVars, elemFluxVarsCache, scvf);
+ using NumEqVector = std::decay_t<decltype(neumannFlux)>;
+ if (Dune::FloatCmp::eq<NumEqVector, Dune::FloatCmp::CmpStyle::absolute>(neumannFlux, NumEqVector(0.0), 1e-30))
+ scvfFluxes[scvfIndexInInside[localScvfIdx]] = 0;
+ // cubes
+ else if (dim == 1 || geomType.isCube())
+ {
+ const auto fIdx = scvfIndexInInside[localScvfIdx];
+ const auto fIdxOpposite = fIdx%2 ? fIdx-1 : fIdx+1;
+ scvfFluxes[fIdx] = -scvfFluxes[fIdxOpposite];
+ }
+ // simplices
+ else if (geomType.isSimplex())
+ scvfFluxes[scvfIndexInInside[localScvfIdx]] = 0;
}
- // simplices
- else if (geomType.isSimplex())
- scvfFluxes[scvfIndexInInside[localScvfIdx]] = 0;
}
}
@@ -304,6 +323,7 @@ public:
localScvfIdx++;
}
+
Velocity refVelocity;
// cubes: On the reference element simply average over opposite fluxes
// note that this is equal to a corner velocity interpolation method
diff --git a/test/references/test_1ptracer_transport-reference.vtu b/test/references/test_1ptracer_transport-reference.vtu
index 219faa70d7254585dcf61537ae85f05fd3385c7f..043d35e1bcffffdd36a118a7258d276446df5a11 100644
--- a/test/references/test_1ptracer_transport-reference.vtu
+++ b/test/references/test_1ptracer_transport-reference.vtu
@@ -637,19 +637,19 @@
1000 1000 1000 1000
</DataArray>
<DataArray type="Float32" Name="velocity_Groundwater (m/s)" NumberOfComponents="3" format="ascii">
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- 7.600337248e-09 3.272032245e-08 0 3.134172388e-08 1.546748877e-06 0 4.832586598e-08 7.22737866e-07 0 3.008161542e-08 9.104686427e-08 0
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@@ -1249,20 +1249,20 @@
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- </DataArray>
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+ </DataArray>
<DataArray type="Float32" Name="process rank" NumberOfComponents="1" format="ascii">
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