[swe][frictionlaw] Small changes.

dumux/freeflow/shallowwater/boundaryfluxes.hh

@@ -24,7 +24,7 @@
  * The boundary conditions are given at the the outer face of the
  * the boundary cells. In this form the boundary condition can't be
  * processed by the riemann Solver, because it needs two cell states, one at
- * each side of a face. Therefore they Riemann invariants are used to
+ * each side of a face. Therefore the Riemann invariants are used to
  * calculate a virtual outer state.
  */
 #ifndef DUMUX_SHALLOWWATER_BOUNDARYFLUXES_HH

dumux/material/fluidmatrixinteractions/frictionlaws/frictionlaw.hh

@@ -46,7 +46,7 @@ public:
      * from contiuums mechanics, but a force projected on an area. Therefore it is a
      * vector with two entries.
      *
-     * \return shear stress. First entry is the x-component, the second the y-component.
+     * \return shear stress [N/m^2]. First entry is the x-component, the second the y-component.
      */
 
     virtual Dune::FieldVector<Scalar, 2> computeShearStress(const VolumeVariables& VolVar) const = 0;

dumux/material/fluidmatrixinteractions/frictionlaws/manning.hh

@@ -58,7 +58,7 @@ public:
      * from contiuums mechanics, but a force projected on an area. Therefore it is a
      * vector with two entries.
      *
-     * \return shear stress. First entry is the x-component, the second the y-component.
+     * \return shear stress [N/m^2]. First entry is the x-component, the second the y-component.
      */
     Dune::FieldVector<Scalar, 2> computeShearStress(const VolumeVariables& volVars) const final
     {

dumux/material/fluidmatrixinteractions/frictionlaws/nikuradse.hh

@@ -57,7 +57,7 @@ public:
      * from contiuums mechanics, but a force projected on an area. Therefore it is a
      * vector with two entries.
      *
-     * \return shear stress. First entry is the x-component, the second the y-component.
+     * \return shear stress [N/m^2]. First entry is the x-component, the second the y-component.
      */
     Dune::FieldVector<Scalar, 2> computeShearStress(const VolumeVariables& volVars) const final
     {

test/freeflow/shallowwater/roughchannel/problem.hh

@@ -76,10 +76,6 @@ struct EnableFVGridGeometryCache<TypeTag, TTag::RoughChannel>
 template<class TypeTag>
 struct EnableGridVolumeVariablesCache<TypeTag, TTag::RoughChannel>
 { static constexpr bool value = false; };
-
-template<class TypeTag>
-struct EnableGridFluxVariablesCache<TypeTag, TTag::RoughChannel>
-{ static constexpr bool value = false; };
 } // end namespace Properties
 
 /*!
@@ -318,7 +314,6 @@ public:
         // no flow boundary
         else
         {
-            boundaryStateVariables = {0,0,0};
             boundaryStateVariables[0] = insideVolVars.waterDepth();
             boundaryStateVariables[1] = -insideVolVars.velocity(0);
             boundaryStateVariables[2] = -insideVolVars.velocity(1);