porousmediumflow/2p1c/darcyslaw.hh

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#ifndef DUMUX_2P1C_SPURIOUS_FLUX_BLOCKING_DARCYS_LAW_HH
#define DUMUX_2P1C_SPURIOUS_FLUX_BLOCKING_DARCYS_LAW_HH
 
#include <dumux/common/math.hh>
#include <dumux/common/parameters.hh>
#include <dumux/common/properties.hh>
#include <dumux/discretization/method.hh>
#include <dumux/flux/darcyslaw.hh>
 
namespace Dumux {
 
namespace Properties {
     template<class TypeTag, class MyTypeTag>
struct UseBlockingOfSpuriousFlow { using type = UndefinedProperty; }; 
}
 
template <class TypeTag>
class TwoPOneCDarcysLaw : public DarcysLaw<TypeTag>
{
    using ParentType = DarcysLaw<TypeTag>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using FVElementGeometry = typename GetPropType<TypeTag, Properties::GridGeometry>::LocalView;
    using SubControlVolume = typename FVElementGeometry::SubControlVolume;
    using SubControlVolumeFace = typename FVElementGeometry::SubControlVolumeFace;
    using GridFluxVariablesCache = GetPropType<TypeTag, Properties::GridFluxVariablesCache>;
    using ElemFluxVarCache = typename GridFluxVariablesCache::LocalView;
    using ElementVolumeVariables = typename GetPropType<TypeTag, Properties::GridVolumeVariables>::LocalView;
    using VolumeVariables = GetPropType<TypeTag, Properties::VolumeVariables>;
    using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView;
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using FluidSystem = GetPropType<TypeTag, Properties::FluidSystem>;
    using Indices = typename GetPropType<TypeTag, Properties::ModelTraits>::Indices;
    using Element = typename GridView::template Codim<0>::Entity;
    using CoordScalar = typename GridView::ctype;
 
    enum { dim = GridView::dimension};
    enum { dimWorld = GridView::dimensionworld};
 
    // copy some indices for convenience
    enum {
        // phase indices
        liquidPhaseIdx = FluidSystem::liquidPhaseIdx,
        gasPhaseIdx = FluidSystem::gasPhaseIdx,
    };
 
    using DimWorldMatrix = Dune::FieldMatrix<Scalar, dimWorld, dimWorld>;
    using GlobalPosition = Dune::FieldVector<Scalar, dimWorld>;
 
public:
 
    static Scalar flux(const Problem& problem,
                       const Element& element,
                       const FVElementGeometry& fvGeometry,
                       const ElementVolumeVariables& elemVolVars,
                       const SubControlVolumeFace& scvf,
                       const int phaseIdx,
                       const ElemFluxVarCache& elemFluxVarCache)
    {
        const Scalar flux = ParentType::flux(problem, element, fvGeometry, elemVolVars, scvf, phaseIdx, elemFluxVarCache);
 
        // only block wetting-phase (i.e. liquid water) fluxes
        if((!getPropValue<TypeTag, Properties::UseBlockingOfSpuriousFlow>()) || phaseIdx != liquidPhaseIdx)
            return flux;
 
        const auto& insideVolVars = elemVolVars[scvf.insideScvIdx()];
        const auto& outsideVolVars = elemVolVars[scvf.outsideScvIdx()];
 
        const Scalar factor = std::signbit(flux) ? factor_(outsideVolVars, insideVolVars, phaseIdx) :
                                                   factor_(insideVolVars, outsideVolVars, phaseIdx);
 
        return flux * factor;
    }
 
private:
    static Scalar factor_(const VolumeVariables &up, const VolumeVariables &dn,const  int phaseIdx)
    {
        Scalar factor = 1.0;
 
        const Scalar tDn = dn.temperature(); //temperature of the downstream SCV (where the cold water is potentially intruding into a steam zone)
        const Scalar tUp = up.temperature(); //temperature of the upstream SCV
 
        const Scalar sgDn = dn.saturation(gasPhaseIdx); //gas phase saturation of the downstream SCV
        const Scalar sgUp = up.saturation(gasPhaseIdx); //gas phase saturation of the upstream SCV
 
        bool upIsNotSteam = false;
        bool downIsSteam = false;
        bool spuriousFlow = false;
 
        if(sgUp <= 1e-5)
            upIsNotSteam = true;
 
        if(sgDn > 1e-5)
            downIsSteam = true;
 
        if(upIsNotSteam && downIsSteam  && tDn > tUp && phaseIdx == liquidPhaseIdx)
          spuriousFlow = true;
 
        if(spuriousFlow)
        {
          Scalar deltaT = tDn - tUp;
 
          if((deltaT) > 15 )
            factor = 0.0 ;
 
          else
            factor = 1-(deltaT/15);
        }
        return factor;
    }
};
 
} // end namespace Dumux
 
#endif