kOmegaSSTDDES.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2015 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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    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
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\*---------------------------------------------------------------------------*/
 
#include "kOmegaSSTDDES.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace LESModels
{
 
// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
tmp<volScalarField> kOmegaSSTDDES<BasicTurbulenceModel>::rd
(
    const volScalarField& magGradU
) const
{
    tmp<volScalarField> tr
    (
        min
        (
            this->nuEff()
           /(
                max
                (
                    magGradU,
                    dimensionedScalar("SMALL", magGradU.dimensions(), SMALL)
                )
                *sqr(this->kappa_*this->y_)
            ),
            scalar(10)
        )
    );
    tr().boundaryField() == 0.0;
 
    return tr;
}
 
 
template<class BasicTurbulenceModel>
tmp<volScalarField> kOmegaSSTDDES<BasicTurbulenceModel>::fd
(
    const volScalarField& magGradU
) const
{
    return 1 - tanh(pow(Cd1_*rd(magGradU), Cd2_));
}
 
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
tmp<volScalarField> kOmegaSSTDDES<BasicTurbulenceModel>::dTilda
(
    const volScalarField& magGradU,
    const volScalarField& CDES
) const
{
    const volScalarField& k = this->k_;
    const volScalarField& omega = this->omega_;
 
    const volScalarField lRAS(sqrt(k)/(this->betaStar_*omega));
    const volScalarField lLES(CDES*this->delta());
 
    return max
    (
        lRAS 
      - fd(magGradU)
       *max
        (
            lRAS - lLES,
            dimensionedScalar("zero", dimLength, 0)
        ),
        dimensionedScalar("small", dimLength, SMALL)
    );
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
kOmegaSSTDDES<BasicTurbulenceModel>::kOmegaSSTDDES
(
    const alphaField& alpha,
    const rhoField& rho,
    const volVectorField& U,
    const surfaceScalarField& alphaRhoPhi,
    const surfaceScalarField& phi,
    const transportModel& transport,
    const word& propertiesName,
    const word& type
)
:
    kOmegaSSTDES<BasicTurbulenceModel>
    (
        alpha,
        rho,
        U,
        alphaRhoPhi,
        phi,
        transport,
        propertiesName,
        type
    ),
 
    Cd1_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "Cd1",
            this->coeffDict_,
            20
        )
    ),
    Cd2_
    (
        dimensioned<scalar>::lookupOrAddToDict
        (
            "Cd2",
            this->coeffDict_,
            3
        )
    )
{
    if (type == typeName)
    {
        this->printCoeffs(type);
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class BasicTurbulenceModel>
bool kOmegaSSTDDES<BasicTurbulenceModel>::read()
{
    if (kOmegaSSTDES<BasicTurbulenceModel>::read())
    {
        Cd1_.readIfPresent(this->coeffDict());
        Cd2_.readIfPresent(this->coeffDict());
 
        return true;
    }
    else
    {
        return false;
    }
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace LESModels
} // End namespace Foam
 
// ************************************************************************* //