fluxstencil.hh

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#ifndef DUMUX_DISCRETIZATION_FLUXSTENCIL_HH
#define DUMUX_DISCRETIZATION_FLUXSTENCIL_HH
 
#include <vector>
 
#include <dune/common/reservedvector.hh>
#include <dumux/common/indextraits.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {
 
template<class FVElementGeometry, class DiscretizationMethod = typename FVElementGeometry::GridGeometry::DiscretizationMethod>
class FluxStencil;
 
/*
 * \ingroup Discretization
 * \brief Flux stencil specialization for the cell-centered tpfa scheme
 * \tparam FVElementGeometry The local view on the finite volume grid geometry
 */
template<class FVElementGeometry>
class FluxStencil<FVElementGeometry, DiscretizationMethods::CCTpfa>
{
    using GridGeometry = typename FVElementGeometry::GridGeometry;
    using SubControlVolumeFace = typename GridGeometry::SubControlVolumeFace;
    using GridView = typename GridGeometry::GridView;
    using Element = typename GridView::template Codim<0>::Entity;
    using GridIndexType = typename IndexTraits<GridView>::GridIndex;
 
public:
    using ScvfStencilIForJ = Dune::ReservedVector<GridIndexType, 1>;
 
    using Stencil = typename SubControlVolumeFace::Traits::GridIndexStorage;
 
    static Stencil stencil(const Element& element,
                           const FVElementGeometry& fvGeometry,
                           const SubControlVolumeFace& scvf)
    {
        if (scvf.boundary())
            return Stencil({scvf.insideScvIdx()});
        else if (scvf.numOutsideScvs() > 1)
        {
            Stencil stencil({scvf.insideScvIdx()});
            for (unsigned int i = 0; i < scvf.numOutsideScvs(); ++i)
                stencil.push_back(scvf.outsideScvIdx(i));
            return stencil;
        }
        else
            return Stencil({scvf.insideScvIdx(), scvf.outsideScvIdx()});
    }
};
 
/*
 * \ingroup Discretization
 * \brief Flux stencil specialization for the cell-centered mpfa scheme
 * \tparam FVElementGeometry The local view on the finite volume grid geometry
 */
template<class FVElementGeometry>
class FluxStencil<FVElementGeometry, DiscretizationMethods::CCMpfa>
{
    using GridGeometry = typename FVElementGeometry::GridGeometry;
    using SubControlVolumeFace = typename GridGeometry::SubControlVolumeFace;
    using GridView = typename GridGeometry::GridView;
    using Element = typename GridView::template Codim<0>::Entity;
    using GridIndexType = typename IndexTraits<GridView>::GridIndex;
 
    // Use the stencil type of the primary interaction volume
    using NodalIndexSet = typename GridGeometry::GridIVIndexSets::DualGridIndexSet::NodalIndexSet;
 
public:
    using ScvfStencilIForJ = std::vector<GridIndexType>;
 
    using Stencil = typename NodalIndexSet::NodalGridStencilType;
 
    static const Stencil& stencil(const Element& element,
                                  const FVElementGeometry& fvGeometry,
                                  const SubControlVolumeFace& scvf)
    {
        const auto& gridGeometry = fvGeometry.gridGeometry();
 
        // return the scv (element) indices in the interaction region
        if (gridGeometry.vertexUsesSecondaryInteractionVolume(scvf.vertexIndex()))
            return gridGeometry.gridInteractionVolumeIndexSets().secondaryIndexSet(scvf).gridScvIndices();
        else
            return gridGeometry.gridInteractionVolumeIndexSets().primaryIndexSet(scvf).gridScvIndices();
    }
};
 
} // end namespace Dumux
 
#endif