linearmaterial.hh

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#ifndef DUMUX_MATERIAL_FLUIDMATRIX_LINEAR_MATERIAL_HH
#define DUMUX_MATERIAL_FLUIDMATRIX_LINEAR_MATERIAL_HH
 
#include <algorithm>
#include <dumux/common/parameters.hh>
#include <dumux/material/fluidmatrixinteractions/2p/materiallaw.hh>
#include <dumux/material/fluidmatrixinteractions/2p/noregularization.hh>
 
namespace Dumux::FluidMatrix {
 
class LinearMaterial
{
public:
    template<class Scalar>
    struct Params
    {
        Params(Scalar pcEntry, Scalar pcMax)
        : pcEntry_(pcEntry), pcMax_(pcMax)
        {}
 
        Scalar pcEntry() const { return pcEntry_; }
        void setPcEntry(Scalar pcEntry) { pcEntry_ = pcEntry; }
 
        Scalar pcMax() const { return pcMax_; }
        void setPcMax(Scalar pcMax) { pcMax_ = pcMax; }
 
        bool operator== (const Params& p) const
        {
            return Dune::FloatCmp::eq(pcEntry(), p.pcEntry(), 1e-6)
                   && Dune::FloatCmp::eq(pcMax(), p.pcMax(), 1e-6);
        }
 
    private:
        Scalar pcEntry_, pcMax_;
    };
 
    template<class Scalar = double>
    static Params<Scalar> makeParams(const std::string& paramGroup)
    {
        const auto pcEntry = getParamFromGroup<Scalar>(paramGroup, "LinearPcEntry");
        const auto pcMax = getParamFromGroup<Scalar>(paramGroup, "LinearPcMax");
        return {pcEntry, pcMax};
    }
 
    template<class Scalar>
    static Scalar pc(Scalar swe, const Params<Scalar>& params)
    {
        return (1.0 - swe)*(params.pcMax() - params.pcEntry()) + params.pcEntry();
    }
 
    template<class Scalar>
    static Scalar swe(Scalar pc, const Params<Scalar>& params)
    {
        return 1.0 - (pc - params.pcEntry())/(params.pcMax() - params.pcEntry());
    }
 
    template<class Scalar>
    static Scalar endPointPc(const Params<Scalar>& params)
    { return params.pcEntry(); }
 
    template<class Scalar>
    static Scalar dpc_dswe(Scalar swe, const Params<Scalar>& params)
    {
        return params.pcEntry() - params.pcMax();
    }
 
    template<class Scalar>
    static Scalar dswe_dpc(Scalar pc, const Params<Scalar>& params)
    {
        return 1.0/(params.pcEntry() - params.pcMax());
    }
 
    template<class Scalar>
    static Scalar krw(Scalar swe, const Params<Scalar>& params)
    {
        using std::clamp;
        return clamp(swe, 0.0, 1.0);
    }
 
    template<class Scalar>
    static Scalar dkrw_dswe(Scalar swe, const Params<Scalar>& params)
    {
        return 1.0;
    }
 
    template<class Scalar>
    static Scalar krn(Scalar swe, const Params<Scalar>& params)
    {
        using std::clamp;
        return clamp(1.0-swe, 0.0, 1.0);
    }
 
    template<class Scalar>
    static Scalar dkrn_dswe(Scalar swe, const Params<Scalar>& params)
    {
        return -1.0;
    }
};
 
template<typename Scalar = double>
using LinearMaterialDefault = TwoPMaterialLaw<Scalar, LinearMaterial, NoRegularization, TwoPEffToAbsDefaultPolicy>;
 
} // end namespace Dumux::FluidMatrix
 
#endif