99a61df00a
conceptually, this may not be the purest conceivable solution, but it is the most practical one.
86 lines
2.7 KiB
C++
86 lines
2.7 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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Copyright (C) 2009-2013 by Andreas Lauser
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Copyright (C) 2010 by Benjamin Faigle
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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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*/
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/*!
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* \file
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*
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* \brief The IAPWS formulation of Henry coefficients in water.
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*/
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#ifndef OPM_HENRY_IAPWS_HPP
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#define OPM_HENRY_IAPWS_HPP
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#include <opm/material/components/H2O.hpp>
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namespace Opm
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{
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/*!
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* \ingroup Binarycoefficients
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* \brief The Henry constants in liquid water using the IAPWS 2004 formulation.
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*
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* This function calculates \f$K_D\f$, see:
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*
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* IAPWS: "Guideline on the Henry's Constant and Vapor-Liquid Distribution Constant for
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* Gases in H2O and D2O at High Temperatures" http://www.iapws.org/relguide/HenGuide.pdf
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*/
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template <class Scalar, class Evaluation>
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inline Evaluation henryIAPWS(Scalar E,
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Scalar F,
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Scalar G,
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Scalar H,
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const Evaluation& temperature)
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{
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typedef Opm::MathToolbox<Evaluation> Toolbox;
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typedef Opm::H2O<Evaluation> H2O;
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Evaluation Tr = temperature/H2O::criticalTemperature();
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Evaluation tau = 1 - Tr;
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static const Scalar c[6] = {
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1.99274064, 1.09965342, -0.510839303,
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-1.75493479,-45.5170352, -6.7469445e5
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};
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static const Scalar d[6] = {
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1/3.0, 2/3.0, 5/3.0,
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16/3.0, 43/3.0, 110/3.0
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};
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static const Scalar q = -0.023767;
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Evaluation f = 0;
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for (int i = 0; i < 6; ++i) {
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f += c[i]*Toolbox::pow(tau, d[i]);
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}
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const Evaluation& exponent =
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q*F +
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E/temperature*f +
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(F +
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G*Toolbox::pow(tau, 2.0/3) +
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H*tau)*
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Toolbox::exp((H2O::tripleTemperature() - temperature)/100);
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// CAUTION: K_D is formulated in mole fractions. We have to
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// multiply it with the vapor pressure of water in order to get
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// derivative of the partial pressure.
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return Toolbox::exp(exponent)*H2O::vaporPressure(temperature);
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}
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} // namespace Opm
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#endif // OPM_HENRY_IAPWS_HPP
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