WaterVapourDensityIAPWSIF97Region4.cpp

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#include "WaterVapourDensityIAPWSIF97Region4.h"
 
#include <cmath>
 
#include "BaseLib/Error.h"
#include "MaterialLib/MPL/Properties/GibbsFreeEnergy/DimensionlessGibbsFreeEnergyRegion2.h"
#include "MaterialLib/MPL/Properties/WaterSaturationCurveIAPWSIF97Region4.h"
#include "MaterialLib/PhysicalConstant.h"
 
namespace MaterialPropertyLib
{
 
PropertyDataType WaterVapourDensityIAPWSIF97Region4::value(
    VariableArray const& variable_array,
    ParameterLib::SpatialPosition const& /*pos*/, double const /*t*/,
    double const /*dt*/) const
{
    double const p = variable_array.liquid_phase_pressure;

    if ((p < 611.213) || (p > 22.064e6))
    {
        WARN(
            "Pressure is out of the range for the water vapour saturation "
            "density.");
    }
 
    double const T_s = IAPWSIF97Region4::waterSaturationTemperature(p);
 
    static constexpr double ref_T_ = 540;   
    static constexpr double ref_p_ = 1.e6;  
    double const tau = ref_T_ / T_s;
    double const pi = p / ref_p_;
 
    double dgamma_dtau =
        MaterialLib::Fluid::DimensionlessGibbsFreeEnergyRegion2::getdGammadPi(
            tau, pi);
 
    return p /
           (pi *
            MaterialLib::PhysicalConstant::SpecificGasConstant::WaterVapour *
            T_s * dgamma_dtau);
}
 
PropertyDataType WaterVapourDensityIAPWSIF97Region4::dValue(
    VariableArray const& /*variable_array*/, Variable const /*variable*/,
    ParameterLib::SpatialPosition const& /*pos*/, double const /*t*/,
    double const /*dt*/) const
{
    OGS_FATAL("WaterVapourDensityIAPWSIF97Region4::dValue is not implemented.");
}
 
}  // namespace MaterialPropertyLib