SpalartAllmaras.C

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-------------------------------------------------------------------------------
    Copyright (C) 2007-2019 PCOpt/NTUA
    Copyright (C) 2013-2019 FOSS GP
    Copyright (C) 2019-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
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.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "SpalartAllmaras.H"
#include "wallDist.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace incompressible
{
namespace RASVariables
{
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
defineTypeNameAndDebug(SpalartAllmaras, 0);
addToRunTimeSelectionTable(RASModelVariables, SpalartAllmaras, dictionary);
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
SpalartAllmaras::SpalartAllmaras
(
    const fvMesh& mesh,
    const solverControl& SolverControl
)
:
    RASModelVariables(mesh, SolverControl)
{
    TMVar1BaseName_ = "nuTilda";
 
    TMVar1Ptr_.ref(mesh_.lookupObjectRef<volScalarField>(TMVar1BaseName_));
 
    TMVar2Ptr_.reset
    (
        new volScalarField
        (
            IOobject
            (
                "dummySpalartAllmarasVar2",
                mesh.time().timeName(),
                mesh,
                IOobject::NO_READ,
                IOobject::NO_WRITE
            ),
            mesh,
            dimensionedScalar(dimless, Zero)
        )
    );
 
    nutPtr_.ref(mesh_.lookupObjectRef<volScalarField>(nutBaseName_));
 
    // The wall dist name can vary depending on how wallDist was
    // constructed. Grab the field directly from wallDist
 
    distPtr_.ref
    (
        const_cast<volScalarField&>(wallDist::New(mesh_).y())
    );
 
    allocateInitValues();
    allocateMeanFields();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
tmp<volScalarField> SpalartAllmaras::nutJacobianVar1
(
    const singlePhaseTransportModel& laminarTransport
) const
{
    auto tnutJacobian = tmp<volScalarField>::New
    (
        IOobject
        (
            "nutJacobianVar1",
            mesh_.time().timeName(),
            mesh_,
            IOobject::NO_READ,
            IOobject::NO_WRITE
        ),
        mesh_,
        dimensionedScalar(dimless, Zero)
    );
    auto& nutJacobian = tnutJacobian.ref();
 
    const volScalarField& nu = laminarTransport.nu();
    const volScalarField& nuTilda = TMVar1();
 
    volScalarField chi(nuTilda/nu);
    volScalarField chi3(pow3(chi));
 
    const scalar Cv13 = pow3(7.1);
    volScalarField fv1(chi3/(chi3 + Cv13));
    volScalarField fv1ByChi2Sqr(sqr(chi/(chi3 + Cv13)));
    volScalarField Cdfv1(3.0*Cv13*fv1ByChi2Sqr);
 
    nutJacobian = Cdfv1*chi + fv1;
 
    return tnutJacobian;
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RASVariables
} // End namespace incompressible
} // End namespace Foam
 
// ************************************************************************* //