gravitypart.hh

Go to the documentation of this file.

// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*****************************************************************************
 *   See the file COPYING for full copying permissions.                      *
 *                                                                           *
 *   This program 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 3 of the License, or       *
 *   (at your option) any later version.                                     *
 *                                                                           *
 *   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.   *
 *****************************************************************************/
#ifndef DUMUX_GRAVITYPART_HH
#define DUMUX_GRAVITYPART_HH
 
#include <dumux/porousmediumflow/2p/sequential/transport/cellcentered/convectivepart.hh>
#include "properties.hh"
 
namespace Dumux {
template<class TypeTag>
class GravityPart: public ConvectivePart<TypeTag>
{
private:
    using GridView = typename GetPropType<TypeTag, Properties::GridGeometry>::GridView;
    using Scalar = GetPropType<TypeTag, Properties::Scalar>;
    using Problem = GetPropType<TypeTag, Properties::Problem>;
    using Indices = typename GetPropType<TypeTag, Properties::ModelTraits>::Indices;
 
    using SpatialParams = GetPropType<TypeTag, Properties::SpatialParams>;
    using MaterialLaw = typename SpatialParams::MaterialLaw;
 
    using FluidSystem = GetPropType<TypeTag, Properties::FluidSystem>;
    using FluidState = GetPropType<TypeTag, Properties::FluidState>;
 
    using CellData = GetPropType<TypeTag, Properties::CellData>;
 
    enum
    {
        dim = GridView::dimension, dimWorld = GridView::dimensionworld
    };
    enum
    {
        wPhaseIdx = Indices::wPhaseIdx, nPhaseIdx = Indices::nPhaseIdx, numPhases = getPropValue<TypeTag, Properties::NumPhases>()
    };
 
    using Intersection = typename GridView::Intersection;
    using DimVector = Dune::FieldVector<Scalar, dim>;
    using GlobalPosition = Dune::FieldVector<Scalar, dimWorld>;
    using DimMatrix = Dune::FieldMatrix<Scalar, dim, dim>;
 
public:

    void getFlux(DimVector& flux, const Intersection& intersection, const Scalar satI, const Scalar satJ) const
    {
        auto element = intersection.inside();
 
        int globalIdxI = problem_.variables().index(element);
        CellData& cellDataI = problem_.variables().cellData(globalIdxI);
 
        int indexInInside = intersection.indexInInside();
 
        //get lambda_bar = lambda_n*f_w
        Scalar lambdaWI = 0;
        Scalar lambdaNwI = 0;
        Scalar lambdaWJ = 0;
        Scalar lambdaNwJ = 0;
 
        if (preComput_)
        {
            lambdaWI=cellDataI.mobility(wPhaseIdx);
            lambdaNwI=cellDataI.mobility(nPhaseIdx);
        }
        else
        {
            lambdaWI = MaterialLaw::krw(problem_.spatialParams().materialLawParams(element), satI);
            lambdaWI /= viscosity_[wPhaseIdx];
            lambdaNwI = MaterialLaw::krn(problem_.spatialParams().materialLawParams(element), satI);
            lambdaNwI /= viscosity_[nPhaseIdx];
        }
 
        Scalar potentialDiffW = cellDataI.fluxData().upwindPotential(wPhaseIdx, indexInInside);
        Scalar potentialDiffNw = cellDataI.fluxData().upwindPotential(nPhaseIdx, indexInInside);
 
        DimMatrix meanPermeability(0);
        GlobalPosition distVec(0);
        Scalar lambdaW =  0;
        Scalar lambdaNw = 0;
 
        if (intersection.neighbor())
        {
            // access neighbor
            auto neighbor = intersection.outside();
 
            int globalIdxJ = problem_.variables().index(neighbor);
            CellData& cellDataJ = problem_.variables().cellData(globalIdxJ);
 
            distVec = neighbor.geometry().center() - element.geometry().center();
 
            // get permeability
            problem_.spatialParams().meanK(meanPermeability,
                    problem_.spatialParams().intrinsicPermeability(element),
                    problem_.spatialParams().intrinsicPermeability(neighbor));
 
            //get lambda_bar = lambda_n*f_w
            if (preComput_)
            {
                lambdaWJ=cellDataJ.mobility(wPhaseIdx);
                lambdaNwJ=cellDataJ.mobility(nPhaseIdx);
            }
            else
            {
                lambdaWJ = MaterialLaw::krw(problem_.spatialParams().materialLawParams(neighbor), satJ);
                lambdaWJ /= viscosity_[wPhaseIdx];
                lambdaNwJ = MaterialLaw::krn(problem_.spatialParams().materialLawParams(neighbor), satJ);
                lambdaNwJ /= viscosity_[nPhaseIdx];
            }
 
            lambdaW = (potentialDiffW >= 0) ? lambdaWI : lambdaWJ;
            lambdaW = (potentialDiffW == 0) ? 0.5 * (lambdaWI + lambdaWJ) : lambdaW;
            lambdaNw = (potentialDiffNw >= 0) ? lambdaNwI : lambdaNwJ;
            lambdaNw = (potentialDiffNw == 0) ? 0.5 * (lambdaNwI + lambdaNwJ) : lambdaNw;
        }
        else
        {
            // get permeability
            problem_.spatialParams().meanK(meanPermeability,
                    problem_.spatialParams().intrinsicPermeability(element));
 
            distVec = intersection.geometry().center() - element.geometry().center();
 
            //calculate lambda_n*f_w at the boundary
            lambdaWJ = MaterialLaw::krw(problem_.spatialParams().materialLawParams(element), satJ);
            lambdaWJ /= viscosity_[wPhaseIdx];
            lambdaNwJ = MaterialLaw::krn(problem_.spatialParams().materialLawParams(element), satJ);
            lambdaNwJ /= viscosity_[nPhaseIdx];
 
            //If potential is zero always take value from the boundary!
            lambdaW = (potentialDiffW > 0) ? lambdaWI : lambdaWJ;
            lambdaNw = (potentialDiffNw > 0) ? lambdaNwI : lambdaNwJ;
        }
 
        // set result to K*grad(pc)
        const Dune::FieldVector<Scalar, dim>& unitOuterNormal = intersection.centerUnitOuterNormal();
        Scalar dist = distVec.two_norm();
        //calculate unit distVec
        distVec /= dist;
        Scalar areaScaling = (unitOuterNormal * distVec);
 
        Dune::FieldVector<Scalar, dim> permeability(0);
        meanPermeability.mv(unitOuterNormal, permeability);
 
        Scalar scalarPerm = permeability.two_norm();
 
        Scalar scalarGravity = problem_.gravity() * distVec;
 
        flux = unitOuterNormal;
 
        // set result to f_w*lambda_n*K*grad(pc)
        flux *= lambdaW*lambdaNw/(lambdaW+lambdaNw) * scalarPerm * (density_[wPhaseIdx] - density_[nPhaseIdx]) * scalarGravity * areaScaling;
    }

    GravityPart (Problem& problem)
    : ConvectivePart<TypeTag>(problem), problem_(problem), preComput_(getPropValue<TypeTag, Properties::PrecomputedConstRels>())
    {}

    void initialize()
    {
        auto element = *problem_.gridView().template begin<0> ();
        FluidState fluidState;
        fluidState.setPressure(wPhaseIdx, problem_.referencePressure(element));
        fluidState.setPressure(nPhaseIdx, problem_.referencePressure(element));
        fluidState.setTemperature(problem_.temperature(element));
        fluidState.setSaturation(wPhaseIdx, 1.);
        fluidState.setSaturation(nPhaseIdx, 0.);
        density_[wPhaseIdx] = FluidSystem::density(fluidState, wPhaseIdx);
        density_[nPhaseIdx] = FluidSystem::density(fluidState, nPhaseIdx);
        viscosity_[wPhaseIdx] = FluidSystem::viscosity(fluidState, wPhaseIdx);
        viscosity_[nPhaseIdx] = FluidSystem::viscosity(fluidState, nPhaseIdx);
    }
 
private:
    Problem& problem_; //problem data
    const bool preComput_;//if preCompute = true the mobilities are taken from the variable object,
                          //if preCompute = false new mobilities will be taken (for implicit Scheme)
    Scalar density_[numPhases];
    Scalar viscosity_[numPhases];
};
} // end namespace Dumux
 
#endif