flux/ccmpfa/fourierslaw.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_DISCRETIZATION_CC_MPFA_FOURIERS_LAW_HH
#define DUMUX_DISCRETIZATION_CC_MPFA_FOURIERS_LAW_HH
 
#include <dune/common/dynvector.hh>
#include <dune/common/dynmatrix.hh>
 
#include <dumux/common/properties.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {
 
template<class TypeTag, class DiscretizationMethod>
class FouriersLawImplementation;
 
template <class TypeTag>
class FouriersLawImplementation<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;
    using GridFluxVariablesCache = GetPropType<TypeTag, Properties::GridFluxVariablesCache>;
    using ElementFluxVarsCache = typename GridFluxVariablesCache::LocalView;
    using FluxVariablesCache = typename GridFluxVariablesCache::FluxVariablesCache;
 
    class MpfaFouriersLawCacheFiller
    {
    public:
        template<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 from the flux vars cache filler & update the cache
          if (fvGeometry.gridGeometry().vertexUsesSecondaryInteractionVolume(scvf.vertexIndex()))
              scvfFluxVarsCache.updateHeatConduction(fluxVarsCacheFiller.secondaryInteractionVolume(),
                                                     fluxVarsCacheFiller.secondaryIvLocalFaceData(),
                                                     fluxVarsCacheFiller.secondaryIvDataHandle());
          else
              scvfFluxVarsCache.updateHeatConduction(fluxVarsCacheFiller.primaryInteractionVolume(),
                                                     fluxVarsCacheFiller.primaryIvLocalFaceData(),
                                                     fluxVarsCacheFiller.primaryIvDataHandle());
        }
    };
 
    class MpfaFouriersLawCache
    {
        using DualGridNodalIndexSet = GetPropType<TypeTag, Properties::DualGridNodalIndexSet>;
        using Stencil = typename DualGridNodalIndexSet::NodalGridStencilType;
 
        static constexpr bool considerSecondaryIVs = GridGeometry::MpfaHelper::considerSecondaryIVs();
        using PrimaryDataHandle = typename ElementFluxVarsCache::PrimaryIvDataHandle::HeatConductionHandle;
        using SecondaryDataHandle = typename ElementFluxVarsCache::SecondaryIvDataHandle::HeatConductionHandle;
 
        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 filler type
        using Filler = MpfaFouriersLawCacheFiller;
 
         template<class IV, class LocalFaceData, class DataHandle>
         void updateHeatConduction(const IV& iv,
                                   const LocalFaceData& localFaceData,
                                   const DataHandle& dataHandle)
        {
            switchFluxSign_ = localFaceData.isOutsideFace();
            stencil_ = &iv.stencil();
            setHandlePointer_(dataHandle.heatConductionHandle());
        }
 
        const Stencil& heatConductionStencil() const { return *stencil_; }
 
        const PrimaryDataHandle& heatConductionPrimaryDataHandle() const { return *primaryHandlePtr_; }
        const SecondaryDataHandle& heatConductionSecondaryDataHandle() const { return *secondaryHandlePtr_; }
 
        bool heatConductionSwitchFluxSign() 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{};
 
    // state the type for the corresponding cache and its filler
    using Cache = MpfaFouriersLawCache;
 
    static Scalar flux(const Problem& problem,
                       const Element& element,
                       const FVElementGeometry& fvGeometry,
                       const ElementVolumeVariables& elemVolVars,
                       const SubControlVolumeFace& scvf,
                       const ElementFluxVarsCache& elemFluxVarsCache)
    {
        const auto& fluxVarsCache = elemFluxVarsCache[scvf];
 
        // forward to the private function taking the iv data handle
        if (fluxVarsCache.usesSecondaryIv())
            return flux_(problem, fluxVarsCache, fluxVarsCache.heatConductionSecondaryDataHandle());
        else
            return flux_(problem, fluxVarsCache, fluxVarsCache.heatConductionPrimaryDataHandle());
    }
 
private:
    template< class Problem, class FluxVarsCache, class DataHandle >
    static Scalar flux_(const Problem& problem,
                        const FluxVarsCache& cache,
                        const DataHandle& dataHandle)
    {
        const bool switchSign = cache.heatConductionSwitchFluxSign();
 
        const auto localFaceIdx = cache.ivLocalFaceIndex();
        const auto idxInOutside = cache.indexInOutsideFaces();
        const auto& Tj = dataHandle.uj();
        const auto& tij = dim == dimWorld ? dataHandle.T()[localFaceIdx]
                                          : (!switchSign ? dataHandle.T()[localFaceIdx]
                                                         : dataHandle.tijOutside()[localFaceIdx][idxInOutside]);
        Scalar scvfFlux = tij*Tj;
 
        // switch the sign if necessary
        if (switchSign)
            scvfFlux *= -1.0;
 
        return scvfFlux;
    }
};
 
} // end namespace Dumux
 
#endif