99a61df00a
conceptually, this may not be the purest conceivable solution, but it is the most practical one.
76 lines
2.3 KiB
C++
76 lines
2.3 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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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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* \copydoc Opm::IdealGas
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*/
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#ifndef OPM_IDEAL_GAS_HPP
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#define OPM_IDEAL_GAS_HPP
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#include <opm/material/Constants.hpp>
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namespace Opm {
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/*!
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* \brief Relations valid for an ideal gas.
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*/
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template <class Scalar>
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class IdealGas
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{
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public:
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//! The ideal gas constant \f$\mathrm{[J/mol/K]}\f$
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static const Scalar R;
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/*!
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* \brief The density of the gas in \f$\mathrm{[kg/m^3]}\f$, depending on
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* pressure, temperature and average molar mass of the gas.
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*/
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template <class Evaluation>
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static Evaluation density(const Evaluation& avgMolarMass,
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const Evaluation& temperature,
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const Evaluation& pressure)
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{ return pressure*avgMolarMass/(R*temperature); }
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/*!
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* \brief The pressure of the gas in \f$\mathrm{[N/m^2]}\f$, depending on
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* the molar density and temperature.
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*/
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template <class Evaluation>
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static Evaluation pressure(const Evaluation& temperature,
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const Evaluation& rhoMolar)
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{ return R*temperature*rhoMolar; }
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/*!
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* \brief The molar density of the gas \f$\mathrm{[mol/m^3]}\f$,
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* depending on pressure and temperature.
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*/
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template <class Evaluation>
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static Evaluation molarDensity(const Evaluation& temperature,
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const Evaluation& pressure)
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{ return pressure/(R*temperature); }
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};
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template <class Scalar>
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const Scalar IdealGas<Scalar>::R = Opm::Constants<Scalar>::R;
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} // namespace Opm
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#endif
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