mplinearmaterial.hh

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#ifndef DUMUX_MP_LINEAR_MATERIAL_HH
#define DUMUX_MP_LINEAR_MATERIAL_HH
 
#include <algorithm>
#include <dune/common/fvector.hh>
#include <dumux/material/fluidmatrixinteractions/fluidmatrixinteraction.hh>
 
namespace Dumux::FluidMatrix {

template<class S, int numFluidPhases>
class MPLinearMaterial
: public Adapter<MPLinearMaterial<S, numFluidPhases>, MultiPhasePcKrSw>
{
    struct Params
    {
        Params(const std::array<S, numFluidPhases>& pcMaxSat,
               const std::array<S, numFluidPhases>& pcMinSat)
        : pcMaxSat_(pcMaxSat), pcMinSat_(pcMinSat) {}
 
        S pcMaxSat(int phaseIdx) const { return pcMaxSat_[phaseIdx]; }
        S pcMinSat(int phaseIdx) const { return pcMinSat_[phaseIdx]; }
    private:
        std::array<S, numFluidPhases> pcMaxSat_;
        std::array<S, numFluidPhases> pcMinSat_;
    };
 
public:
    using BasicParams = Params;
    using Scalar = S;
 
    MPLinearMaterial(const BasicParams& basicParams)
    : basicParams_(basicParams)
    {}

    template <class FluidState>
    auto capillaryPressures(const FluidState& state, int wPhaseIdx = 0) const
    {
        static_assert(FluidState::numPhases == numFluidPhases, "FluidState doesn't match the number of fluid phases!");
        Dune::FieldVector<typename FluidState::Scalar, numFluidPhases> values;
        for (int phaseIdx = 0; phaseIdx < numFluidPhases; ++phaseIdx)
        {
            const Scalar saturation = state.saturation(phaseIdx);
            values[phaseIdx] =
                saturation*basicParams_.pcMaxSat(phaseIdx) +
                (1 - saturation)*basicParams_.pcMinSat(phaseIdx);
        }
        return values;
    }

    template <class FluidState>
    auto relativePermeabilities(const FluidState& state, int wPhaseIdx = 0) const
    {
        static_assert(FluidState::numPhases == numFluidPhases, "FluidState doesn't match the number of fluid phases!");
        using std::clamp;
        Dune::FieldVector<typename FluidState::Scalar, FluidState::numPhases> values;
        for (int phaseIdx = 0; phaseIdx < FluidState::numPhases; ++phaseIdx)
            values[phaseIdx] = clamp(state.saturation(phaseIdx), 0.0, 1.0);
        return values;
    }
private:
    BasicParams basicParams_;
};
 
} // end namespace Dumux::FluidMatrix
 
#endif