H2O_Air.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_BINARY_COEFF_H2O_AIR_HPP
#define OPM_BINARY_COEFF_H2O_AIR_HPP
 
#include <opm/material/common/MathToolbox.hpp>
 
#include <cmath>
 
namespace Opm {
namespace BinaryCoeff {

class H2O_Air
{
public:
    template <class Evaluation>
    static Evaluation henry(const Evaluation& temperature)
    { return 1.0/((0.8942+1.47*exp(-0.04394*(temperature-273.15)))*1e-10); }

    template <class Evaluation>
    static Evaluation gasDiffCoeff(const Evaluation& temperature, const Evaluation& pressure)
    {
        double Theta=1.8;
        double Daw=2.13e-5;  /* reference value */
        double pg0=1.e5;     /* reference pressure */
        double T0=273.15;    /* reference temperature */
 
        return Daw*(pg0/pressure)*pow((temperature/T0),Theta);
    }

    template <class Evaluation>
    static Evaluation liquidDiffCoeff(const Evaluation& temperature, const Evaluation& /*pressure*/)
    {
        const double Texp = 273.15 + 25; // [K]
        const double Dexp = 2.01e-9; // [m^2/s]
        return Dexp/Texp*temperature;
    }
};
 
} // namespace BinaryCoeff
} // namespace Opm
 
#endif