EclThconrLaw.hpp

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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 OPM_ECL_THCONR_LAW_HPP
#define OPM_ECL_THCONR_LAW_HPP
 
#include "EclThconrLawParams.hpp"
 
#include <opm/material/densead/Math.hpp>
 
namespace Opm
{
template <class ScalarT,
          class FluidSystem,
          class ParamsT = EclThconrLawParams<ScalarT>>
class EclThconrLaw
{
public:
    using Params = ParamsT;
    using Scalar = typename Params::Scalar;

    template <class FluidState, class Evaluation = typename FluidState::Scalar>
    static Evaluation thermalConductivity(const Params& params,
                                          const FluidState& fluidState)
    {
        // THCONR + THCONSF approach.
        Scalar lambdaRef = params.referenceTotalThermalConductivity();
        static constexpr int gasPhaseIdx = FluidSystem::gasPhaseIdx;
        if (FluidSystem::phaseIsActive(gasPhaseIdx)) {
            Scalar alpha = params.dTotalThermalConductivity_dSg();
            const Evaluation& Sg = decay<Evaluation>(fluidState.saturation(gasPhaseIdx));
            return lambdaRef*(1.0 - alpha*Sg);
        } else {
            return lambdaRef;
        }
    }
};
 
} // namespace Opm
 
#endif