207 lines
5 KiB
C
207 lines
5 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 "kEqn.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace LESModels
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{
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// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
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template<class BasicTurbulenceModel>
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void kEqn<BasicTurbulenceModel>::correctNut()
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{
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this->nut_ = Ck_*sqrt(k_)*this->delta();
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this->nut_.correctBoundaryConditions();
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BasicTurbulenceModel::correctNut();
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}
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template<class BasicTurbulenceModel>
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tmp<fvScalarMatrix> kEqn<BasicTurbulenceModel>::kSource() const
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{
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return tmp<fvScalarMatrix>
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(
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new fvScalarMatrix
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(
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k_,
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dimVolume*this->rho_.dimensions()*k_.dimensions()
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/dimTime
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)
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);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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template<class BasicTurbulenceModel>
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kEqn<BasicTurbulenceModel>::kEqn
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(
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const alphaField& alpha,
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const rhoField& rho,
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const volVectorField& U,
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const surfaceScalarField& alphaRhoPhi,
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const surfaceScalarField& phi,
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const transportModel& transport,
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const word& propertiesName,
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const word& type
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)
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:
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LESeddyViscosity<BasicTurbulenceModel>
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(
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type,
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alpha,
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rho,
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U,
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alphaRhoPhi,
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phi,
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transport,
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propertiesName
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),
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k_
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(
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IOobject
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(
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IOobject::groupName("k", this->U_.group()),
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this->runTime_.timeName(),
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this->mesh_,
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IOobject::MUST_READ,
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IOobject::AUTO_WRITE
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),
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this->mesh_
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),
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Ck_
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(
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dimensioned<scalar>::lookupOrAddToDict
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(
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"Ck",
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this->coeffDict_,
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0.094
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)
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)
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{
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if (type == typeName)
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{
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correctNut();
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this->printCoeffs(type);
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}
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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template<class BasicTurbulenceModel>
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bool kEqn<BasicTurbulenceModel>::read()
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{
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if (LESeddyViscosity<BasicTurbulenceModel>::read())
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{
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Ck_.readIfPresent(this->coeffDict());
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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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template<class BasicTurbulenceModel>
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tmp<volScalarField> kEqn<BasicTurbulenceModel>::epsilon() const
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{
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return tmp<volScalarField>
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(
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new volScalarField
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(
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IOobject
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(
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IOobject::groupName("epsilon", this->U_.group()),
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this->runTime_.timeName(),
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this->mesh_,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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this->Ce_*k()*sqrt(k())/this->delta()
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)
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);
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}
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template<class BasicTurbulenceModel>
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void kEqn<BasicTurbulenceModel>::correct()
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{
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if (!this->turbulence_)
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{
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return;
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}
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// Local references
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const alphaField& alpha = this->alpha_;
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const rhoField& rho = this->rho_;
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const surfaceScalarField& alphaRhoPhi = this->alphaRhoPhi_;
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const volVectorField& U = this->U_;
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volScalarField& nut = this->nut_;
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LESeddyViscosity<BasicTurbulenceModel>::correct();
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volScalarField divU(fvc::div(fvc::absolute(this->phi(), U)));
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tmp<volTensorField> tgradU(fvc::grad(U));
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volScalarField G(this->GName(), nut*(tgradU() && dev(twoSymm(tgradU()))));
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tgradU.clear();
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tmp<fvScalarMatrix> kEqn
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(
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fvm::ddt(alpha, rho, k_)
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+ fvm::div(alphaRhoPhi, k_)
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- fvm::laplacian(alpha*rho*DkEff(), k_)
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==
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alpha*rho*G
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- fvm::SuSp((2.0/3.0)*alpha*rho*divU, k_)
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- fvm::Sp(this->Ce_*alpha*rho*sqrt(k_)/this->delta(), k_)
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+ kSource()
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);
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kEqn().relax();
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solve(kEqn);
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bound(k_, this->kMin_);
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correctNut();
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace LESModels
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} // End namespace Foam
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// ************************************************************************* //
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