Gulder.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
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#include "Gulder.H"
#include <OpenFOAM/addToRunTimeSelectionTable.H>

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace XiEqModels
{
    defineTypeNameAndDebug(Gulder, 0);
    addToRunTimeSelectionTable(XiEqModel, Gulder, dictionary);
};
};


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::XiEqModels::Gulder::Gulder
(
    const dictionary& XiEqProperties,
    const hhuCombustionThermo& thermo,
    const compressible::RASModel& turbulence,
    const volScalarField& Su
)
:
    XiEqModel(XiEqProperties, thermo, turbulence, Su),
    XiEqCoef(readScalar(XiEqModelCoeffs_.lookup("XiEqCoef"))),
    SuMin(0.01*Su.average())
{}


// * * * * * * * * * * * * * * * * Destructors * * * * * * * * * * * * * * * //

Foam::XiEqModels::Gulder::~Gulder()
{}


// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

Foam::tmp<Foam::volScalarField> Foam::XiEqModels::Gulder::XiEq() const
{
    volScalarField up = sqrt((2.0/3.0)*turbulence_.k());
    const volScalarField& epsilon = turbulence_.epsilon();

    volScalarField tauEta = sqrt(mag(thermo_.muu()/(thermo_.rhou()*epsilon)));

    volScalarField Reta = up/
    (
        sqrt(epsilon*tauEta)
      + dimensionedScalar("1e-8", up.dimensions(), 1e-8)
    );

    return 1.0 + XiEqCoef*sqrt(up/(Su_ + SuMin))*Reta;
}


bool Foam::XiEqModels::Gulder::read(const dictionary& XiEqProperties)
{
    XiEqModel::read(XiEqProperties);

    XiEqModelCoeffs_.lookup("XiEqCoef") >> XiEqCoef;

    return true;
}


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