kOmega.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
\*---------------------------------------------------------------------------*/
 
#include "kOmega.H"
#include "bound.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RASModels
{
 
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
void kOmega<BasicTurbulenceModel>::correctNut()
{
    this->nut_ = k_/omega_;
    this->nut_.correctBoundaryConditions();
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
kOmega<BasicTurbulenceModel>::kOmega
(
    const alphaField& alpha,
    const rhoField& rho,
    const volVectorField& U,
    const surfaceScalarField& alphaRhoPhi,
    const surfaceScalarField& phi,
    const transportModel& transport,
    const word& propertiesName,
    const word& type
)
:
    eddyViscosity<RASModel<BasicTurbulenceModel> >
    (
        type,
        alpha,
        rho,
        U,
        alphaRhoPhi,
        phi,
        transport,
        propertiesName
    ),
 
    Cmu_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "betaStar",
            this->coeffDict_,
            0.09
        )
    ),
    beta_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "beta",
            this->coeffDict_,
            0.072
        )
    ),
    gamma_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "gamma",
            this->coeffDict_,
            0.52
        )
    ),
    alphaK_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "alphaK",
            this->coeffDict_,
            0.5
        )
    ),
    alphaOmega_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "alphaOmega",
            this->coeffDict_,
            0.5
        )
    ),
 
    k_
    (
        IOobject
        (
            IOobject::groupName("k", U.group()),
            this->runTime_.timeName(),
            this->mesh_,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        this->mesh_
    ),
    omega_
    (
        IOobject
        (
            IOobject::groupName("omega", U.group()),
            this->runTime_.timeName(),
            this->mesh_,
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        this->mesh_
    )
{
    bound(k_, this->kMin_);
    bound(omega_, this->omegaMin_);
 
    if (type == typeName)
    {
        this->printCoeffs(type);
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
bool kOmega<BasicTurbulenceModel>::read()
{
    if (eddyViscosity<RASModel<BasicTurbulenceModel> >::read())
    {
        Cmu_.readIfPresent(this->coeffDict());
        beta_.readIfPresent(this->coeffDict());
        gamma_.readIfPresent(this->coeffDict());
        alphaK_.readIfPresent(this->coeffDict());
        alphaOmega_.readIfPresent(this->coeffDict());
 
        return true;
    }
    else
    {
        return false;
    }
}
 
 
template<class BasicTurbulenceModel>
void kOmega<BasicTurbulenceModel>::correct()
{
    if (!this->turbulence_)
    {
        return;
    }
 
    // Local references
    const alphaField& alpha = this->alpha_;
    const rhoField& rho = this->rho_;
    const surfaceScalarField& alphaRhoPhi = this->alphaRhoPhi_;
    const volVectorField& U = this->U_;
    volScalarField& nut = this->nut_;
 
    eddyViscosity<RASModel<BasicTurbulenceModel> >::correct();
 
    volScalarField divU(fvc::div(fvc::absolute(this->phi(), U)));
 
    tmp<volTensorField> tgradU = fvc::grad(U);
    volScalarField G
    (
        this->GName(),
        nut*(tgradU() && dev(twoSymm(tgradU())))
    );
    tgradU.clear();
 
    // Update omega and G at the wall
    omega_.boundaryField().updateCoeffs();
 
    // Turbulence specific dissipation rate equation
    tmp<fvScalarMatrix> omegaEqn
    (
        fvm::ddt(alpha, rho, omega_)
      + fvm::div(alphaRhoPhi, omega_)
      - fvm::laplacian(alpha*rho*DomegaEff(), omega_)
     ==
        gamma_*alpha*rho*G*omega_/k_
      - fvm::SuSp(((2.0/3.0)*gamma_)*alpha*rho*divU, omega_)
      - fvm::Sp(beta_*alpha*rho*omega_, omega_)
    );
 
    omegaEqn().relax();
 
    omegaEqn().boundaryManipulate(omega_.boundaryField());
 
    solve(omegaEqn);
    bound(omega_, this->omegaMin_);
 
 
    // Turbulent kinetic energy equation
    tmp<fvScalarMatrix> kEqn
    (
        fvm::ddt(alpha, rho, k_)
      + fvm::div(alphaRhoPhi, k_)
      - fvm::laplacian(alpha*rho*DkEff(), k_)
     ==
        alpha*rho*G
      - fvm::SuSp((2.0/3.0)*alpha*rho*divU, k_)
      - fvm::Sp(Cmu_*alpha*rho*omega_, k_)
    );
 
    kEqn().relax();
    solve(kEqn);
    bound(k_, this->kMin_);
 
    correctNut();
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASModels
} // End namespace Foam
 
// ************************************************************************* //