SCOPEXiEq.C

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    Copyright (C) 2023 OpenCFD Ltd.
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    This file is part of OpenFOAM.

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#include "SCOPEXiEq.H"
#include "addToRunTimeSelectionTable.H"

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

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


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

Foam::XiEqModels::SCOPEXiEq::SCOPEXiEq
(
    const dictionary& XiEqProperties,
    const psiuReactionThermo& thermo,
    const compressible::RASModel& turbulence,
    const volScalarField& Su
)
:
    XiEqModel(XiEqProperties, thermo, turbulence, Su),
    XiEqCoef_(XiEqModelCoeffs_.get<scalar>("XiEqCoef")),
    XiEqExp_(XiEqModelCoeffs_.get<scalar>("XiEqExp")),
    lCoef_(XiEqModelCoeffs_.get<scalar>("lCoef")),
    SuMin_(0.01*Su.average()),
    uPrimeCoef_(XiEqModelCoeffs_.get<scalar>("uPrimeCoef")),
    subGridSchelkin_(XiEqModelCoeffs_.get<bool>("subGridSchelkin")),
    MaModel
    (
        Su.mesh().lookupObject<IOdictionary>("combustionProperties"),
        thermo
    )
{}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

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


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

Foam::tmp<Foam::volScalarField> Foam::XiEqModels::SCOPEXiEq::XiEq() const
{
    const tmp<volScalarField> tk(turbulence_.k());
    const volScalarField& k = tk();
    const tmp<volScalarField> tepsilon(turbulence_.epsilon());
    const volScalarField& epsilon = tepsilon();

    volScalarField up(sqrt((2.0/3.0)*k));
    if (subGridSchelkin_)
    {
        up.primitiveFieldRef() += calculateSchelkinEffect(uPrimeCoef_);
    }

    volScalarField l(lCoef_*sqrt(3.0/2.0)*up*k/epsilon);
    volScalarField Rl(up*l*thermo_.rhou()/thermo_.muu());

    volScalarField upBySu(up/(Su_ + SuMin_));
    volScalarField K(0.157*upBySu/sqrt(Rl));
    volScalarField Ma(MaModel.Ma());

    auto tXiEq = volScalarField::New
    (
        "XiEq",
        IOobject::NO_REGISTER,
        epsilon.mesh(),
        dimensionedScalar(dimless, Zero)
    );
    auto& xieq = tXiEq.ref();

    forAll(xieq, celli)
    {
        if (Ma[celli] > 0.01)
        {
            xieq[celli] =
                XiEqCoef_*pow(K[celli]*Ma[celli], -XiEqExp_)*upBySu[celli];
        }
    }

    volScalarField::Boundary& xieqBf = xieq.boundaryFieldRef();

    forAll(xieq.boundaryField(), patchi)
    {
        scalarField& xieqp = xieqBf[patchi];
        const scalarField& Kp = K.boundaryField()[patchi];
        const scalarField& Map = Ma.boundaryField()[patchi];
        const scalarField& upBySup = upBySu.boundaryField()[patchi];

        forAll(xieqp, facei)
        {
            if (Ma[facei] > 0.01)
            {
                xieqp[facei] =
                    XiEqCoef_*pow(Kp[facei]*Map[facei], -XiEqExp_)
                   *upBySup[facei];
            }
        }
    }

    return tXiEq;
}


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

    XiEqModelCoeffs_.readEntry("XiEqCoef", XiEqCoef_);
    XiEqModelCoeffs_.readEntry("XiEqExp", XiEqExp_);
    XiEqModelCoeffs_.readEntry("lCoef", lCoef_);
    XiEqModelCoeffs_.readEntry("uPrimeCoef", uPrimeCoef_);
    XiEqModelCoeffs_.readEntry("subGridSchelkin", subGridSchelkin_);

    return true;
}


// ************************************************************************* //