facecentered/diamond/elementsolution.hh

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#ifndef DUMUX_DISCRETIZATION_FACECENTERED_DIAMOND_ELEMENT_SOLUTION_HH
#define DUMUX_DISCRETIZATION_FACECENTERED_DIAMOND_ELEMENT_SOLUTION_HH
 
#include <type_traits>
#include <array>
 
#include <dune/common/reservedvector.hh>
#include <dumux/common/indextraits.hh>
#include <dumux/discretization/method.hh>
 
namespace Dumux {
 
template<class FVElementGeometry, class PV>
class FaceCenteredDiamondElementSolution
{
    using GridGeometry = typename FVElementGeometry::GridGeometry;
    using GridView = typename GridGeometry::GridView;
    using Element = typename GridView::template Codim<0>::Entity;
 
    static constexpr int dim = GridView::dimension;
    static constexpr int numCubeFaces = 2*dim;
 
public:
    using PrimaryVariables = PV;
 
    FaceCenteredDiamondElementSolution() = default;
 
    template<class SolutionVector>
    FaceCenteredDiamondElementSolution(const Element& element, const SolutionVector& sol,
                                       const GridGeometry& gridGeometry)
    {
        update(element, sol, gridGeometry);
    }
 
    template<class ElementVolumeVariables>
    FaceCenteredDiamondElementSolution(const Element& element, const ElementVolumeVariables& elemVolVars,
                                       const FVElementGeometry& fvGeometry)
    {
        priVars_.resize(fvGeometry.numScv());
        for (const auto& scv : scvs(fvGeometry))
            priVars_[scv.localDofIndex()] = elemVolVars[scv].priVars();
    }
 
    template<class SolutionVector>
    void update(const Element& element, const SolutionVector& sol,
                const GridGeometry& gridGeometry)
    {
        const auto numFaces = element.subEntities(1);
        priVars_.resize(numFaces);
        for (int fIdx = 0; fIdx < numFaces; ++fIdx)
            priVars_[fIdx] = sol[gridGeometry.dofMapper().subIndex(element, fIdx, 1)];
    }
 
    template<class SolutionVector>
    void update(const Element& element, const SolutionVector& sol,
                const FVElementGeometry& fvGeometry)
    {
        priVars_.resize(fvGeometry.numScv());
        for (const auto& scv : scvs(fvGeometry))
            priVars_[scv.localDofIndex()] = sol[scv.dofIndex()];
    }
 
    template<typename IndexType>
    const PrimaryVariables& operator [](IndexType localScvIdx) const
    { return priVars_[localScvIdx]; }
 
    template<typename IndexType>
    PrimaryVariables& operator [](IndexType localScvIdx)
    { return priVars_[localScvIdx]; }
 
    std::size_t size() const
    { return priVars_.size(); }
 
private:
    Dune::ReservedVector<PrimaryVariables, numCubeFaces> priVars_;
};
 
template<class Element, class SolutionVector, class GridGeometry>
auto elementSolution(const Element& element, const SolutionVector& sol, const GridGeometry& gg)
-> std::enable_if_t<GridGeometry::discMethod == DiscretizationMethods::fcdiamond,
                    FaceCenteredDiamondElementSolution<typename GridGeometry::LocalView,
                                      std::decay_t<decltype(std::declval<SolutionVector>()[0])>>
                    >
{
    using PrimaryVariables = std::decay_t<decltype(std::declval<SolutionVector>()[0])>;
    return FaceCenteredDiamondElementSolution<typename GridGeometry::LocalView, PrimaryVariables>(element, sol, gg);
}
 
template<class Element, class ElementVolumeVariables, class FVElementGeometry>
auto elementSolution(const Element& element, const ElementVolumeVariables& elemVolVars, const FVElementGeometry& gg)
-> std::enable_if_t<FVElementGeometry::GridGeometry::discMethod == DiscretizationMethods::fcdiamond,
                    FaceCenteredDiamondElementSolution<FVElementGeometry, typename ElementVolumeVariables::VolumeVariables::PrimaryVariables>>
{
    using PrimaryVariables = typename ElementVolumeVariables::VolumeVariables::PrimaryVariables;
    return FaceCenteredDiamondElementSolution<FVElementGeometry, PrimaryVariables>(element, elemVolVars, gg);
}
 
} // end namespace Dumux
 
#endif