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:
/*
  Copyright (C) 2009-2013 by Andreas Lauser
  Copyright (C) 2010 by Felix Bode
  Copyright (C) 2010 by Benjamin Faigle

  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 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)
    {
        typedef Opm::MathToolbox<Evaluation> Toolbox;

        return 1.0/((0.8942+1.47*Toolbox::exp(-0.04394*(temperature-273.15)))*1.E-10);
    }

    template <class Evaluation>
    static Evaluation gasDiffCoeff(const Evaluation& temperature, const Evaluation& pressure)
    {
        typedef Opm::MathToolbox<Evaluation> Toolbox;

        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)*Toolbox::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