139 lines
5.5 KiB
C++
139 lines
5.5 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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*
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* \brief This is test for the ChiFlash flash solver.
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*/
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#include "config.h"
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#include <opm/material/constraintsolvers/ChiFlash.hpp>
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#include <opm/material/fluidsystems/ThreeComponentFluidSystem.hh>
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#include <opm/material/densead/Evaluation.hpp>
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#include <opm/material/constraintsolvers/ComputeFromReferencePhase.hpp>
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#include <opm/material/fluidstates/CompositionalFluidState.hpp>
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#include <opm/material/fluidmatrixinteractions/LinearMaterial.hpp>
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#include <dune/common/parallel/mpihelper.hh>
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void testChiFlash()
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{
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using Scalar = double;
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using FluidSystem = Opm::ThreeComponentFluidSystem<Scalar>;
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constexpr auto numComponents = FluidSystem::numComponents;
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using Evaluation = Opm::DenseAd::Evaluation<double, numComponents>;
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typedef Dune::FieldVector<Evaluation, numComponents> ComponentVector;
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typedef Opm::CompositionalFluidState<Evaluation, FluidSystem> FluidState;
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// It is a three component system
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// Initial: the primary variables are, pressure, molar fractions of the first and second component
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Evaluation p_init = Evaluation::createVariable(10e5, 0); // 10 bar
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ComponentVector comp;
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comp[0] = Evaluation::createVariable(0.5, 1);
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comp[1] = Evaluation::createVariable(0.3, 2);
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comp[2] = 1. - comp[0] - comp[1];
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// TODO: not sure whether the saturation matter here.
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ComponentVector sat;
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// We assume that currently everything is in the oil phase
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sat[0] = 1.0; sat[1] = 1.0-sat[0];
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Scalar temp = 300.0;
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// FluidState will be the input for the flash calculation
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FluidState fluid_state;
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fluid_state.setPressure(FluidSystem::oilPhaseIdx, p_init);
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fluid_state.setPressure(FluidSystem::gasPhaseIdx, p_init);
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fluid_state.setMoleFraction(FluidSystem::oilPhaseIdx, FluidSystem::Comp0Idx, comp[0]);
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fluid_state.setMoleFraction(FluidSystem::oilPhaseIdx, FluidSystem::Comp1Idx, comp[1]);
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fluid_state.setMoleFraction(FluidSystem::oilPhaseIdx, FluidSystem::Comp2Idx, comp[2]);
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fluid_state.setMoleFraction(FluidSystem::gasPhaseIdx, FluidSystem::Comp0Idx, comp[0]);
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fluid_state.setMoleFraction(FluidSystem::gasPhaseIdx, FluidSystem::Comp1Idx, comp[1]);
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fluid_state.setMoleFraction(FluidSystem::gasPhaseIdx, FluidSystem::Comp2Idx, comp[2]);
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// It is used here only for calculate the z
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fluid_state.setSaturation(FluidSystem::oilPhaseIdx, sat[0]);
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fluid_state.setSaturation(FluidSystem::gasPhaseIdx, sat[1]);
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fluid_state.setTemperature(temp);
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// ParameterCache paramCache;
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{
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typename FluidSystem::template ParameterCache<Evaluation> paramCache;
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paramCache.updatePhase(fluid_state, FluidSystem::oilPhaseIdx);
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paramCache.updatePhase(fluid_state, FluidSystem::gasPhaseIdx);
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fluid_state.setDensity(FluidSystem::oilPhaseIdx, FluidSystem::density(fluid_state, paramCache, FluidSystem::oilPhaseIdx));
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fluid_state.setDensity(FluidSystem::gasPhaseIdx, FluidSystem::density(fluid_state, paramCache, FluidSystem::gasPhaseIdx));
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}
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ComponentVector z(0.); // TODO; z needs to be normalized.
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{
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Scalar sumMoles = 0.0;
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for (unsigned phaseIdx = 0; phaseIdx < FluidSystem::numPhases; ++phaseIdx) {
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for (unsigned compIdx = 0; compIdx < numComponents; ++compIdx) {
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Scalar tmp = Opm::getValue(fluid_state.molarity(phaseIdx, compIdx) * fluid_state.saturation(phaseIdx));
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z[compIdx] += Opm::max(tmp, 1e-8);
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sumMoles += tmp;
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}
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}
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z /= sumMoles;
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// p And z is the primary variables
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Evaluation z_last = 1.;
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for (unsigned compIdx = 0; compIdx < numComponents - 1; ++compIdx) {
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z[compIdx] = Evaluation::createVariable(Opm::getValue(z[compIdx]), compIdx + 1);
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z_last -= z[compIdx];
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}
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z[numComponents - 1] = z_last;
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}
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const double flash_tolerance = 1.e-12; // just to test the setup in co2-compositional
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const int flash_verbosity = 1;
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const std::string flash_twophase_method = "newton";
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// TODO: should we set these?
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// Set initial K and L
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for (unsigned compIdx = 0; compIdx < numComponents; ++compIdx) {
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const Evaluation Ktmp = fluid_state.wilsonK_(compIdx);
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fluid_state.setKvalue(compIdx, Ktmp);
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}
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const Evaluation Ltmp = 1.;
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fluid_state.setLvalue(Ltmp);
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const int spatialIdx = 0;
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using Flash = Opm::ChiFlash<double, FluidSystem>;
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Flash::solve(fluid_state, z, spatialIdx, flash_verbosity, flash_twophase_method, flash_tolerance);
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}
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int main(int argc, char **argv)
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{
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Dune::MPIHelper::instance(argc, argv);
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testChiFlash();
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return 0;
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} |