Smagorinsky.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
     \\/     M anipulation  |
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#include "Smagorinsky.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
tmp<volScalarField> Smagorinsky<BasicTurbulenceModel>::k
(
    const tmp<volTensorField>& gradU
) const
{
    volSymmTensorField D(symm(gradU));
 
    volScalarField a(this->Ce_/this->delta());
    volScalarField b((2.0/3.0)*tr(D));
    volScalarField c(2*Ck_*this->delta()*(dev(D) && D));
 
    return tmp<volScalarField>
    (
        new volScalarField
        (
            IOobject
            (
                IOobject::groupName("k", this->U_.group()),
                this->runTime_.timeName(),
                this->mesh_
            ),
            sqr((-b + sqrt(sqr(b) + 4*a*c))/(2*a))
        )
    );
}
 
 
template<class BasicTurbulenceModel>
void Smagorinsky<BasicTurbulenceModel>::correctNut()
{
    volScalarField k(this->k(fvc::grad(this->U_)));
 
    this->nut_ = Ck_*this->delta()*sqrt(k);
    this->nut_.correctBoundaryConditions();
 
    BasicTurbulenceModel::correctNut();
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
Smagorinsky<BasicTurbulenceModel>::Smagorinsky
(
    const alphaField& alpha,
    const rhoField& rho,
    const volVectorField& U,
    const surfaceScalarField& alphaRhoPhi,
    const surfaceScalarField& phi,
    const transportModel& transport,
    const word& propertiesName,
    const word& type
)
:
    LESeddyViscosity<BasicTurbulenceModel>
    (
        type,
        alpha,
        rho,
        U,
        alphaRhoPhi,
        phi,
        transport,
        propertiesName
    ),
 
    Ck_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "Ck",
            this->coeffDict_,
            0.094
        )
    )
{
    if (type == typeName)
    {
        this->printCoeffs(type);
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
bool Smagorinsky<BasicTurbulenceModel>::read()
{
    if (LESeddyViscosity<BasicTurbulenceModel>::read())
    {
        Ck_.readIfPresent(this->coeffDict());
 
        return true;
    }
    else
    {
        return false;
    }
}
 
 
template<class BasicTurbulenceModel>
tmp<volScalarField> Smagorinsky<BasicTurbulenceModel>::epsilon() const
{
    volScalarField k(this->k(fvc::grad(this->U_)));
 
    return tmp<volScalarField>
    (
        new volScalarField
        (
            IOobject
            (
                IOobject::groupName("epsilon", this->U_.group()),
                this->runTime_.timeName(),
                this->mesh_
            ),
            this->Ce_*k*sqrt(k)/this->delta()
        )
    );
}
 
 
template<class BasicTurbulenceModel>
void Smagorinsky<BasicTurbulenceModel>::correct()
{
    LESeddyViscosity<BasicTurbulenceModel>::correct();
    correctNut();
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// ************************************************************************* //