box/gridvolumevariables.hh

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#ifndef DUMUX_DISCRETIZATION_BOX_GRID_VOLUMEVARIABLES_HH
#define DUMUX_DISCRETIZATION_BOX_GRID_VOLUMEVARIABLES_HH
 
#include <type_traits>
 
// make the local view function available whenever we use this class
#include <dumux/discretization/localview.hh>
#include <dumux/discretization/box/elementvolumevariables.hh>
#include <dumux/discretization/box/elementsolution.hh>
 
namespace Dumux {
 
template<class P, class VV>
struct BoxDefaultGridVolumeVariablesTraits
{
    using Problem = P;
    using VolumeVariables = VV;
 
    template<class GridVolumeVariables, bool cachingEnabled>
    using LocalView = BoxElementVolumeVariables<GridVolumeVariables, cachingEnabled>;
};
 
template<class Problem,
         class VolumeVariables,
         bool enableGridVolVarsCache = false,
         class Traits = BoxDefaultGridVolumeVariablesTraits<Problem, VolumeVariables> >
class BoxGridVolumeVariables;
 
// specialization in case of storing the volume variables
template<class P, class VV, class Traits>
class BoxGridVolumeVariables<P, VV, /*cachingEnabled*/true, Traits>
{
    using ThisType = BoxGridVolumeVariables<P, VV, true, Traits>;
 
public:
    using Problem = typename Traits::Problem;
 
    using VolumeVariables = typename Traits::VolumeVariables;
 
    static constexpr bool cachingEnabled = true;
 
    using LocalView = typename Traits::template LocalView<ThisType, cachingEnabled>;
 
    BoxGridVolumeVariables(const Problem& problem) : problemPtr_(&problem) {}
 
    template<class GridGeometry, class SolutionVector>
    void update(const GridGeometry& gridGeometry, const SolutionVector& sol)
    {
        volumeVariables_.resize(gridGeometry.gridView().size(0));
        for (const auto& element : elements(gridGeometry.gridView()))
        {
            auto eIdx = gridGeometry.elementMapper().index(element);
 
            auto fvGeometry = localView(gridGeometry);
            fvGeometry.bindElement(element);
 
            // get the element solution
            auto elemSol = elementSolution(element, sol, gridGeometry);
 
            // update the volvars of the element
            volumeVariables_[eIdx].resize(fvGeometry.numScv());
            for (auto&& scv : scvs(fvGeometry))
                volumeVariables_[eIdx][scv.indexInElement()].update(elemSol, problem(), element, scv);
        }
    }
 
    template<class SubControlVolume, typename std::enable_if_t<!std::is_integral<SubControlVolume>::value, int> = 0>
    const VolumeVariables& volVars(const SubControlVolume& scv) const
    { return volumeVariables_[scv.elementIndex()][scv.indexInElement()]; }
 
    template<class SubControlVolume, typename std::enable_if_t<!std::is_integral<SubControlVolume>::value, int> = 0>
    VolumeVariables& volVars(const SubControlVolume& scv)
    { return volumeVariables_[scv.elementIndex()][scv.indexInElement()]; }
 
    const VolumeVariables& volVars(const std::size_t eIdx, const std::size_t scvIdx) const
    { return volumeVariables_[eIdx][scvIdx]; }
 
    VolumeVariables& volVars(const std::size_t eIdx, const std::size_t scvIdx)
    { return volumeVariables_[eIdx][scvIdx]; }
 
    const Problem& problem() const
    { return *problemPtr_; }
 
private:
    const Problem* problemPtr_;
    std::vector<std::vector<VolumeVariables>> volumeVariables_;
};
 
 
// Specialization when the current volume variables are not stored
template<class P, class VV, class Traits>
class BoxGridVolumeVariables<P, VV, /*cachingEnabled*/false, Traits>
{
    using ThisType = BoxGridVolumeVariables<P, VV, false, Traits>;
 
public:
    using Problem = typename Traits::Problem;
 
    using VolumeVariables = typename Traits::VolumeVariables;
 
    static constexpr bool cachingEnabled = false;
 
    using LocalView = typename Traits::template LocalView<ThisType, cachingEnabled>;
 
    BoxGridVolumeVariables(const Problem& problem) : problemPtr_(&problem) {}
 
    template<class GridGeometry, class SolutionVector>
    void update(const GridGeometry& gridGeometry, const SolutionVector& sol) {}
 
    const Problem& problem() const
    { return *problemPtr_;}
 
private:
    const Problem* problemPtr_;
};
 
} // end namespace Dumux
 
#endif