165 lines
4.2 KiB
C
165 lines
4.2 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2011-2015 OpenFOAM Foundation
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "relaxation.H"
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#include "addToRunTimeSelectionTable.H"
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#include "fvm.H"
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#include "LESModel.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace reactionRateFlameAreaModels
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{
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defineTypeNameAndDebug(relaxation, 0);
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addToRunTimeSelectionTable
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(
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reactionRateFlameArea,
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relaxation,
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dictionary
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);
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::reactionRateFlameAreaModels::relaxation::relaxation
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(
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const word modelType,
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const dictionary& dict,
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const fvMesh& mesh,
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const combustionModel& combModel
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)
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:
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reactionRateFlameArea(modelType, dict, mesh, combModel),
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correlation_(dict.subDict(typeName + "Coeffs").subDict(fuel_)),
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C_(readScalar(dict.subDict(typeName + "Coeffs").lookup("C"))),
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alpha_(readScalar(dict.subDict(typeName + "Coeffs").lookup("alpha")))
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::reactionRateFlameAreaModels::relaxation::~relaxation()
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{}
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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void Foam::reactionRateFlameAreaModels::relaxation::correct
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(
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const volScalarField& sigma
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)
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{
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dimensionedScalar omega0
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(
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"omega0",
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dimensionSet(1, -2, -1, 0, 0, 0, 0),
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correlation_.omega0()
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);
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dimensionedScalar sigmaExt
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(
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"sigmaExt",
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dimensionSet(0, 0, -1, 0, 0, 0, 0),
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correlation_.sigmaExt()
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);
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dimensionedScalar omegaMin
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(
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"omegaMin",
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omega0.dimensions(),
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1e-4
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);
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dimensionedScalar kMin
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(
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"kMin",
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sqr(dimVelocity),
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SMALL
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);
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const compressibleTurbulenceModel& turbulence = combModel_.turbulence();
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// Total strain
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const volScalarField sigmaTotal
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(
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sigma + alpha_*turbulence.epsilon()/(turbulence.k() + kMin)
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);
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const volScalarField omegaInf(correlation_.omega0Sigma(sigmaTotal));
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dimensionedScalar sigma0("sigma0", sigma.dimensions(), 0.0);
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const volScalarField tau(C_*mag(sigmaTotal));
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volScalarField Rc
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(
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(tau*omegaInf*(omega0 - omegaInf) + sqr(omegaMin)*sigmaExt)
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/(sqr(omega0 - omegaInf) + sqr(omegaMin))
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);
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const volScalarField rho(combModel_.rho());
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const surfaceScalarField phi(combModel_.phi());
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solve
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(
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fvm::ddt(rho, omega_)
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+ fvm::div(phi, omega_, "div(phi,omega)")
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==
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rho*Rc*omega0
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- fvm::SuSp(rho*(tau + Rc), omega_)
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);
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omega_.min(omega0);
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omega_.max(0.0);
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}
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bool Foam::reactionRateFlameAreaModels::relaxation::read
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(
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const dictionary& dict
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)
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{
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if (reactionRateFlameArea::read(dict))
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{
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coeffDict_ = dict.subDict(typeName + "Coeffs");
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coeffDict_.lookup("C") >> C_;
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coeffDict_.lookup("alpha") >> alpha_;
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correlation_.read
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(
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coeffDict_.subDict(fuel_)
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);
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return true;
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}
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else
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{
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return false;
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}
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}
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// ************************************************************************* //
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