porousmediumflow/fvspatialparams.hh

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#ifndef DUMUX_POROUS_MEDIUM_FLOW_FV_SPATIAL_PARAMS_HH
#define DUMUX_POROUS_MEDIUM_FLOW_FV_SPATIAL_PARAMS_HH
 
#include <dune/common/exceptions.hh>
#include <dune/common/fmatrix.hh>
 
#include <dumux/common/parameters.hh>
#include <dumux/common/math.hh>
#include <dumux/common/fvporousmediumspatialparams.hh>
#include <dumux/common/typetraits/isvalid.hh>
 
namespace Dumux {
 
#ifndef DOXYGEN
namespace Detail {
// helper struct detecting if the user-defined spatial params class has a permeabilityAtPos function
template<class GlobalPosition>
struct hasPermeabilityAtPos
{
    template<class SpatialParams>
    auto operator()(const SpatialParams& a)
    -> decltype(a.permeabilityAtPos(std::declval<GlobalPosition>()))
    {}
};
} // end namespace Detail
#endif
 
template<class GridGeometry, class Scalar, class Implementation>
class FVPorousMediumFlowSpatialParams
: public FVPorousMediumSpatialParams<GridGeometry, Scalar, Implementation>
{
    using ParentType = FVPorousMediumSpatialParams<GridGeometry, Scalar, Implementation>;
    using GridView = typename GridGeometry::GridView;
    using FVElementGeometry = typename GridGeometry::LocalView;
    using SubControlVolume = typename GridGeometry::SubControlVolume;
    using SubControlVolumeFace = typename GridGeometry::SubControlVolumeFace;
    using Element = typename GridView::template Codim<0>::Entity;
 
    enum { dim = GridView::dimension };
    enum { dimWorld = GridView::dimensionworld };
    using DimWorldMatrix = Dune::FieldMatrix<Scalar, dimWorld, dimWorld>;
 
    using GlobalPosition = typename Element::Geometry::GlobalCoordinate;
 
public:
    FVPorousMediumFlowSpatialParams(std::shared_ptr<const GridGeometry> gridGeometry)
    : ParentType(gridGeometry)
    {
        /* \brief default forchheimer coefficient
         * Source: Ward, J.C. 1964 Turbulent flow in porous media. ASCE J. Hydraul. Div 90 \cite ward1964 .
         *        Actually the Forchheimer coefficient is also a function of the dimensions of the
         *        porous medium. Taking it as a constant is only a first approximation
         *        (Nield, Bejan, Convection in porous media, 2006, p. 10 \cite nield2006 )
         */
        forchCoeffDefault_ = getParam<Scalar>("SpatialParams.ForchCoeff", 0.55);
    }
 
    template<class ElementSolution>
    decltype(auto) permeability(const Element& element,
                                const SubControlVolume& scv,
                                const ElementSolution& elemSol) const
    {
        static_assert(decltype(isValid(Detail::hasPermeabilityAtPos<GlobalPosition>())(this->asImp_()))::value," \n\n"
        "   Your spatial params class has to either implement\n\n"
        "         const PermeabilityType& permeabilityAtPos(const GlobalPosition& globalPos) const\n\n"
        "   or overload this function\n\n"
        "         template<class ElementSolution>\n"
        "         const PermeabilityType& permeability(const Element& element,\n"
        "                                              const SubControlVolume& scv,\n"
        "                                              const ElementSolution& elemSol) const\n\n");
 
        return this->asImp_().permeabilityAtPos(scv.center());
    }
 
    static constexpr bool evaluatePermeabilityAtScvfIP()
    { return false; }
 
    Scalar beaversJosephCoeffAtPos(const GlobalPosition& globalPos) const
    {
        DUNE_THROW(Dune::InvalidStateException,
                   "The spatial parameters do not provide a beaversJosephCoeffAtPos() method.");
    }
 
    Scalar forchCoeff(const SubControlVolumeFace &scvf) const
    {
        return forchCoeffDefault_;
    }
 
private:
    Scalar forchCoeffDefault_;
};
 
} // namespace Dumux
 
#endif