richardslocalresidual.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:
/*
  Copyright (C) 2010-2013 by Andreas Lauser

  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/>.
*/
#ifndef EWOMS_RICHARDS_LOCAL_RESIDUAL_HH
#define EWOMS_RICHARDS_LOCAL_RESIDUAL_HH

#include "richardsintensivequantities.hh"

#include "richardsextensivequantities.hh"

namespace Ewoms {

template <class TypeTag>
class RichardsLocalResidual : public GET_PROP_TYPE(TypeTag, DiscLocalResidual)
{
    typedef typename GET_PROP_TYPE(TypeTag, EqVector) EqVector;
    typedef typename GET_PROP_TYPE(TypeTag, Evaluation) Evaluation;
    typedef typename GET_PROP_TYPE(TypeTag, RateVector) RateVector;
    typedef typename GET_PROP_TYPE(TypeTag, IntensiveQuantities) IntensiveQuantities;
    typedef typename GET_PROP_TYPE(TypeTag, ElementContext) ElementContext;
    typedef typename GET_PROP_TYPE(TypeTag, Indices) Indices;

    enum { contiEqIdx = Indices::contiEqIdx };
    enum { liquidPhaseIdx = GET_PROP_VALUE(TypeTag, LiquidPhaseIndex) };
    enum { numEq = GET_PROP_VALUE(TypeTag, NumEq) };
    typedef Opm::MathToolbox<Evaluation> Toolbox;

public:
    template <class LhsEval>
    void computeStorage(Dune::FieldVector<LhsEval, numEq> &storage,
                        const ElementContext &elemCtx,
                        int dofIdx,
                        int timeIdx) const
    {
        const IntensiveQuantities &intQuants = elemCtx.intensiveQuantities(dofIdx, timeIdx);

        // partial time derivative of the wetting phase mass
        storage[contiEqIdx] =
            Toolbox::template toLhs<LhsEval>(intQuants.fluidState().density(liquidPhaseIdx))
            *Toolbox::template toLhs<LhsEval>(intQuants.fluidState().saturation(liquidPhaseIdx))
            *Toolbox::template toLhs<LhsEval>(intQuants.porosity());
    }

    void computeFlux(RateVector &flux, const ElementContext &elemCtx,
                     int scvfIdx, int timeIdx) const
    {
        const auto &extQuants = elemCtx.extensiveQuantities(scvfIdx, timeIdx);

        int interiorIdx = extQuants.interiorIndex();
        int upIdx = extQuants.upstreamIndex(liquidPhaseIdx);

        const IntensiveQuantities &up = elemCtx.intensiveQuantities(upIdx, timeIdx);

        // compute advective mass flux of the liquid phase. This is slightly hacky
        // because it is specific to the element-centered finite volume method.
        const Evaluation& rho = up.fluidState().density(liquidPhaseIdx);
        if (interiorIdx == upIdx)
            flux[contiEqIdx] = extQuants.volumeFlux(liquidPhaseIdx)*rho;
        else
            flux[contiEqIdx] = extQuants.volumeFlux(liquidPhaseIdx)*Toolbox::value(rho);
    }

    void computeSource(RateVector &source,
                       const ElementContext &elemCtx,
                       int dofIdx,
                       int timeIdx) const
    { elemCtx.problem().source(source, elemCtx, dofIdx, timeIdx); }
};

} // namespace Ewoms

#endif