flux/ccmpfa/darcyslaw.hh

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#ifndef DUMUX_DISCRETIZATION_CC_MPFA_DARCYS_LAW_HH
#define DUMUX_DISCRETIZATION_CC_MPFA_DARCYS_LAW_HH
 
#include <dune/common/dynvector.hh>
#include <dune/common/dynmatrix.hh>
 
#include <dumux/common/properties.hh>
#include <dumux/common/parameters.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {
 
template<class TypeTag, class DiscretizationMethod>
class DarcysLawImplementation;
 
template<class TypeTag>
class DarcysLawImplementation<TypeTag, DiscretizationMethods::CCMpfa>
{
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView;
    using Element = typename GridView::template Codim<0>::Entity;
 
    static constexpr int dim = GridView::dimension;
    static constexpr int dimWorld = GridView::dimensionworld;
 
    using GridGeometry = GetPropType<TypeTag, Properties::GridGeometry>;
    using FVElementGeometry = typename GridGeometry::LocalView;
    using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace;
    using ElementVolumeVariables = typename GetPropType<TypeTag, Properties::GridVolumeVariables>::LocalView;
 
    class MpfaDarcysLawCacheFiller
    {
    public:
        template<class FluxVariablesCache, class FluxVariablesCacheFiller>
        static void fill(FluxVariablesCache& scvfFluxVarsCache,
                         const Problem& problem,
                         const Element& element,
                         const FVElementGeometry& fvGeometry,
                         const ElementVolumeVariables& elemVolVars,
                         const SubControlVolumeFace& scvf,
                         const FluxVariablesCacheFiller& fluxVarsCacheFiller)
        {
            // get interaction volume related data from the filler class & update the cache
            if (fvGeometry.gridGeometry().vertexUsesSecondaryInteractionVolume(scvf.vertexIndex()))
                scvfFluxVarsCache.updateAdvection(fluxVarsCacheFiller.secondaryInteractionVolume(),
                                                  fluxVarsCacheFiller.secondaryIvLocalFaceData(),
                                                  fluxVarsCacheFiller.secondaryIvDataHandle());
            else
                scvfFluxVarsCache.updateAdvection(fluxVarsCacheFiller.primaryInteractionVolume(),
                                                  fluxVarsCacheFiller.primaryIvLocalFaceData(),
                                                  fluxVarsCacheFiller.primaryIvDataHandle());
        }
    };
 
    class MpfaDarcysLawCache
    {
        using DualGridNodalIndexSet = GetPropType<TypeTag, Properties::DualGridNodalIndexSet>;
        using ElementFluxVariablesCache = typename GetPropType<TypeTag, Properties::GridFluxVariablesCache>::LocalView;
 
        using Stencil = typename DualGridNodalIndexSet::NodalGridStencilType;
 
        static constexpr bool considerSecondaryIVs = GridGeometry::MpfaHelper::considerSecondaryIVs();
        using PrimaryDataHandle = typename ElementFluxVariablesCache::PrimaryIvDataHandle::AdvectionHandle;
        using SecondaryDataHandle = typename ElementFluxVariablesCache::SecondaryIvDataHandle::AdvectionHandle;
 
        template< bool doSecondary = considerSecondaryIVs, std::enable_if_t<doSecondary, int> = 0 >
        void setHandlePointer_(const SecondaryDataHandle& dataHandle)
        { secondaryHandlePtr_ = &dataHandle; }
 
        void setHandlePointer_(const PrimaryDataHandle& dataHandle)
        { primaryHandlePtr_ = &dataHandle; }
 
    public:
        // export the filler type
        using Filler = MpfaDarcysLawCacheFiller;
 
        template<class IV, class LocalFaceData, class DataHandle>
        void updateAdvection(const IV& iv,
                             const LocalFaceData& localFaceData,
                             const DataHandle& dataHandle)
        {
            switchFluxSign_ = localFaceData.isOutsideFace();
            stencil_ = &iv.stencil();
            setHandlePointer_(dataHandle.advectionHandle());
        }
 
        const Stencil& advectionStencil() const { return *stencil_; }
 
        const PrimaryDataHandle& advectionPrimaryDataHandle() const { return *primaryHandlePtr_; }
        const SecondaryDataHandle& advectionSecondaryDataHandle() const { return *secondaryHandlePtr_; }
 
        bool advectionSwitchFluxSign() const { return switchFluxSign_; }
 
    private:
        bool switchFluxSign_;
 
        const PrimaryDataHandle* primaryHandlePtr_;
        const SecondaryDataHandle* secondaryHandlePtr_;
 
        const Stencil* stencil_;
    };
 
public:
    using DiscretizationMethod = DiscretizationMethods::CCMpfa;
    // state the discretization method this implementation belongs to
    static constexpr DiscretizationMethod discMethod{};
 
    // export the type for the corresponding cache
    using Cache = MpfaDarcysLawCache;
 
    template<class ElementFluxVariablesCache>
    static Scalar flux(const Problem& problem,
                       const Element& element,
                       const FVElementGeometry& fvGeometry,
                       const ElementVolumeVariables& elemVolVars,
                       const SubControlVolumeFace& scvf,
                       const unsigned int phaseIdx,
                       const ElementFluxVariablesCache& elemFluxVarsCache)
    {
        const auto& fluxVarsCache = elemFluxVarsCache[scvf];
 
        // forward to the private function taking the iv data handle
        if (fluxVarsCache.usesSecondaryIv())
            return flux_(problem, fluxVarsCache, fluxVarsCache.advectionSecondaryDataHandle(), phaseIdx);
        else
            return flux_(problem, fluxVarsCache, fluxVarsCache.advectionPrimaryDataHandle(), phaseIdx);
    }
 
private:
    template< class Problem, class FluxVarsCache, class DataHandle >
    static Scalar flux_(const Problem& problem,
                        const FluxVarsCache& cache,
                        const DataHandle& dataHandle,
                        int phaseIdx)
    {
        dataHandle.setPhaseIndex(phaseIdx);
 
        const bool switchSign = cache.advectionSwitchFluxSign();
 
        const auto localFaceIdx = cache.ivLocalFaceIndex();
        const auto idxInOutside = cache.indexInOutsideFaces();
        const auto& pj = dataHandle.uj();
        const auto& tij = dim == dimWorld ? dataHandle.T()[localFaceIdx]
                                          : (!switchSign ? dataHandle.T()[localFaceIdx]
                                                         : dataHandle.tijOutside()[localFaceIdx][idxInOutside]);
        Scalar scvfFlux = tij*pj;
 
        // maybe add gravitational acceleration
        static const bool enableGravity = getParamFromGroup<bool>(problem.paramGroup(), "Problem.EnableGravity");
        if (enableGravity)
            scvfFlux += dim == dimWorld ? dataHandle.g()[localFaceIdx]
                                        : (!switchSign ? dataHandle.g()[localFaceIdx]
                                                       : dataHandle.gOutside()[localFaceIdx][idxInOutside]);
 
        // switch the sign if necessary
        if (switchSign)
            scvfFlux *= -1.0;
 
        return scvfFlux;
    }
};
 
} // end namespace
 
#endif