diffusivitymillingtonquirk.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_MATERIAL_DIFFUSIVITY_MILLINGTON_QUIRK_HH
#define DUMUX_MATERIAL_DIFFUSIVITY_MILLINGTON_QUIRK_HH
 
#include <cmath>
 
namespace Dumux {

template<class Scalar>
class DiffusivityMillingtonQuirk
{
public:
    [[deprecated("Signature deprecated. Use effectiveDiffusionCoefficient(volvars, phaseIdx, comp1dxI, compIdxJ)!")]]
    static Scalar effectiveDiffusivity(const Scalar porosity,
                                       const Scalar saturation,
                                       const Scalar diffCoeff)
    {
        // instead of D_eff,pm = phi * Sw * 1/phi^2 * (phi * Sw)^(7/3) * D
        // we calculate the more efficient
        // D_eff,pm = phi * Sw^3 * cubicroot(phi * Sw) * D
 
        using std::cbrt;
        return porosity * (saturation*saturation*saturation) * cbrt(porosity * saturation) * diffCoeff;
    }

    template<class VolumeVariables>
    static Scalar effectiveDiffusionCoefficient(const VolumeVariables& volVars,
                                                const int phaseIdx,
                                                const int compIdxI,
                                                const int compIdxJ)
    {
        // instead of D_eff,pm = phi * Sw * 1/phi^2 * (phi * Sw)^(7/3) * D
        // we calculate the more efficient
        // D_eff,pm = phi * Sw^3 * cubicroot(phi * Sw) * D
 
        using std::cbrt;
        using std::max;
        const Scalar diffCoeff = volVars.diffusionCoefficient(phaseIdx, compIdxI, compIdxJ);
        const Scalar porosity = volVars.porosity();
        const Scalar sat = max(volVars.saturation(phaseIdx), 0.0);
        return porosity * (sat*sat*sat) * cbrt(porosity * sat) * diffCoeff;
    }
 
};
}
#endif