6689e6d08f
have to use anchoring to root namespace in some places due to overlapping namespace and class type names.
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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// vi: set et ts=4 sw=4 sts=4:
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/*
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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Consult the COPYING file in the top-level source directory of this
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module for the precise wording of the license and the list of
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copyright holders.
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*/
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/*!
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* \file
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* \copydoc Opm::BinaryCoeff::fullerMethod
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*/
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#ifndef OPM_FULLERMETHOD_HPP
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#define OPM_FULLERMETHOD_HPP
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#include <opm/material/common/Means.hpp>
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#include <opm/material/common/MathToolbox.hpp>
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#include <cmath>
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namespace Opm {
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namespace BinaryCoeff {
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/*!
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* \ingroup Binarycoefficients
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* \brief Estimate binary diffusion coefficents \f$\mathrm{[m^2/s]}\f$ in gases according to
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* the method by Fuller.
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*
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* \param M molar masses \f$\mathrm{[g/mol]}\f$
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* \param SigmaNu atomic diffusion volume
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* \param temperature The temperature \f$\mathrm{[K]}\f$
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* \param pressure phase pressure \f$\mathrm{[Pa]}\f$
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*
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* This function estimates the diffusion coefficents in binary gases
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* using to the method proposed by Fuller. This method and is only
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* valid at "low" pressures.
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*
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* See: R. Reid, et al.: The Properties of Gases and Liquids, 4th
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* edition, McGraw-Hill, 1987, pp. 587-588
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*/
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template <class Scalar, class Evaluation = Scalar>
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inline Evaluation fullerMethod(const Scalar* M, // molar masses [g/mol]
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const Scalar* SigmaNu, // atomic diffusion volume
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const Evaluation& temperature, // [K]
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const Evaluation& pressure) // [Pa]
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{
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// "effective" molar mass in [g/m^3]
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Scalar Mab = harmonicMean(M[0], M[1]);
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// Fuller's method
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const Evaluation& tmp = std::pow(SigmaNu[0], 1./3) + std::pow(SigmaNu[1], 1./3);
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return 1e-4 * (143.0*pow(temperature, 1.75))/(pressure*std::sqrt(Mab)*tmp*tmp);
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}
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} // namespace BinaryCoeff
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} // namespace Opm
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#endif
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