discretefracturelocalresidual.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:
/*
  This file is part of the Open Porous Media project (OPM).
 
  OPM is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 2 of the License, or
  (at your option) any later version.
 
  OPM is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 
  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/
#ifndef EWOMS_DISCRETE_FRACTURE_LOCAL_RESIDUAL_BASE_HH
#define EWOMS_DISCRETE_FRACTURE_LOCAL_RESIDUAL_BASE_HH
 
#include <opm/models/immiscible/immisciblelocalresidual.hh>
 
namespace Opm {
 
template <class TypeTag>
class DiscreteFractureLocalResidual : public ImmiscibleLocalResidual<TypeTag>
{
    using ParentType = ImmiscibleLocalResidual<TypeTag>;
 
    using ElementContext = GetPropType<TypeTag, Properties::ElementContext>;
    using Indices = GetPropType<TypeTag, Properties::Indices>;
    using EqVector = GetPropType<TypeTag, Properties::EqVector>;
    using RateVector = GetPropType<TypeTag, Properties::RateVector>;
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
 
    enum { conti0EqIdx = Indices::conti0EqIdx };
    enum { numPhases = getPropValue<TypeTag, Properties::NumPhases>() };
    enum { enableEnergy = getPropValue<TypeTag, Properties::EnableEnergy>() };
 
    using EnergyModule = Opm::EnergyModule<TypeTag, enableEnergy>;
 
public:
    void addPhaseStorage(EqVector& storage,
                         const ElementContext& elemCtx,
                         unsigned dofIdx,
                         unsigned timeIdx,
                         unsigned phaseIdx) const
    {
        EqVector phaseStorage(0.0);
        ParentType::addPhaseStorage(phaseStorage, elemCtx, dofIdx, timeIdx, phaseIdx);
 
        const auto& problem = elemCtx.problem();
        const auto& fractureMapper = problem.fractureMapper();
        unsigned globalIdx = elemCtx.globalSpaceIndex(dofIdx, timeIdx);
 
        if (!fractureMapper.isFractureVertex(globalIdx)) {
            // don't do anything in addition to the immiscible model for degrees of
            // freedom that do not feature fractures
            storage += phaseStorage;
            return;
        }
 
        const auto& intQuants = elemCtx.intensiveQuantities(dofIdx, timeIdx);
        const auto& scv = elemCtx.stencil(timeIdx).subControlVolume(dofIdx);
 
        // reduce the matrix storage by the fracture volume
        phaseStorage *= 1 - intQuants.fractureVolume()/scv.volume();
 
        // add the storage term inside the fractures
        const auto& fsFracture = intQuants.fractureFluidState();
 
        phaseStorage[conti0EqIdx + phaseIdx] +=
            intQuants.fracturePorosity()*
            fsFracture.saturation(phaseIdx) *
            fsFracture.density(phaseIdx) *
            intQuants.fractureVolume()/scv.volume();
 
        EnergyModule::addFracturePhaseStorage(phaseStorage, intQuants, scv,
                                              phaseIdx);
 
        // add the result to the overall storage term
        storage += phaseStorage;
    }
 
    void computeFlux(RateVector& flux,
                     const ElementContext& elemCtx,
                     unsigned scvfIdx,
                     unsigned timeIdx) const
    {
        ParentType::computeFlux(flux, elemCtx, scvfIdx, timeIdx);
 
        const auto& extQuants = elemCtx.extensiveQuantities(scvfIdx, timeIdx);
 
        unsigned i = extQuants.interiorIndex();
        unsigned j = extQuants.exteriorIndex();
        unsigned I = elemCtx.globalSpaceIndex(i, timeIdx);
        unsigned J = elemCtx.globalSpaceIndex(j, timeIdx);
        const auto& fractureMapper = elemCtx.problem().fractureMapper();
        if (!fractureMapper.isFractureEdge(I, J))
            // do nothing if the edge from i to j is not part of a
            // fracture
            return;
 
        const auto& scvf = elemCtx.stencil(timeIdx).interiorFace(scvfIdx);
        Scalar scvfArea = scvf.area();
 
        // advective mass fluxes of all phases
        for (unsigned phaseIdx = 0; phaseIdx < numPhases; ++phaseIdx) {
            if (!elemCtx.model().phaseIsConsidered(phaseIdx))
                continue;
 
            // reduce the matrix mass flux by the width of the scv
            // face that is occupied by the fracture. As usual, the
            // fracture is shared between two SCVs, so the its width
            // needs to be divided by two.
            flux[conti0EqIdx + phaseIdx] *=
                1 - extQuants.fractureWidth() / (2 * scvfArea);
 
            // intensive quantities of the upstream and the downstream DOFs
            unsigned upIdx = static_cast<unsigned>(extQuants.upstreamIndex(phaseIdx));
            const auto& up = elemCtx.intensiveQuantities(upIdx, timeIdx);
            flux[conti0EqIdx + phaseIdx] +=
                extQuants.fractureVolumeFlux(phaseIdx) * up.fractureFluidState().density(phaseIdx);
        }
 
        EnergyModule::handleFractureFlux(flux, elemCtx, scvfIdx, timeIdx);
    }
};
 
} // namespace Opm
 
#endif