SimpleCO2.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

  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_SIMPLE_CO2_HPP
#define OPM_SIMPLE_CO2_HPP

#include <opm/material/IdealGas.hpp>
#include <opm/material/components/Component.hpp>

#include <cmath>

namespace Opm {

template <class Scalar>
class SimpleCO2 : public Component<Scalar, SimpleCO2<Scalar> >
{
    typedef Opm::IdealGas<Scalar> IdealGas;

public:
    static const char *name()
    { return "CO2"; }

    static Scalar molarMass()
    { return 44e-3; }

    static Scalar criticalTemperature()
    { return 273.15 + 30.95; /* [K] */ }

    static Scalar criticalPressure()
    { return 73.8e5; /* [N/m^2] */ }

    static Scalar tripleTemperature()
    { return 273.15 - 56.35; /* [K] */ }

    static Scalar triplePressure()
    { return 5.11e5; /* [N/m^2] */ }

    static bool gasIsCompressible()
    { return true; }

    static bool gasIsIdeal()
    { return true; }

    template <class Evaluation>
    static Evaluation gasEnthalpy(const Evaluation& temperature,
                                  const Evaluation& /*pressure*/)
    { return 571.3e3 + (temperature - 298.15)*0.85e3; }

    template <class Evaluation>
    static Evaluation liquidEnthalpy(const Evaluation& temperature,
                                     const Evaluation& /*pressure*/)
    { return (temperature - 298.15)*5e3; }

    template <class Evaluation>
    static Evaluation gasInternalEnergy(const Evaluation& temperature,
                                        const Evaluation& pressure)
    {
        return
            gasEnthalpy(temperature, pressure) -
            1/molarMass()* // conversion from [J/(mol K)] to [J/(kg K)]
            IdealGas::R*temperature; // = pressure * spec. volume for an ideal gas
    }

    template <class Evaluation>
    static Evaluation gasDensity(const Evaluation& temperature, const Evaluation& pressure)
    {
        // Assume an ideal gas
        return IdealGas::density(Evaluation(molarMass()), temperature, pressure);
    }

    template <class Evaluation>
    static Evaluation gasViscosity(const Evaluation& temperature, const Evaluation& /*pressure*/)
    {
        const Scalar Tc = criticalTemperature();
        const Scalar Vc = 93.9; // critical specific volume [cm^3/mol]
        const Scalar omega = 0.239; // accentric factor
        const Scalar M = molarMass() * 1e3; // molar mas [g/mol]
        const Scalar dipole = 0.0; // dipole moment [debye]

        Scalar mu_r4 = 131.3 * dipole / std::sqrt(Vc * Tc);
        mu_r4 *= mu_r4;
        mu_r4 *= mu_r4;

        Scalar Fc = 1 - 0.2756*omega + 0.059035*mu_r4;
        Scalar Tstar = 1.2593 * temperature/Tc;
        Scalar Omega_v =
            1.16145*std::pow(Tstar, -0.14874) +
            0.52487*std::exp(- 0.77320*Tstar) +
            2.16178*std::exp(- 2.43787*Tstar);
        Scalar mu = 40.785*Fc*std::sqrt(M*temperature)/(std::pow(Vc, 2./3)*Omega_v);

        // convertion from micro poise to Pa s
        return mu/1e6 / 10;
    }
};

} // namespace Opm

#endif