compressibleInterPhaseTransportModel.C

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    Copyright (C) 2020 OpenCFD Ltd.
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#include "compressibleInterPhaseTransportModel.H"

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

Foam::compressibleInterPhaseTransportModel::compressibleInterPhaseTransportModel
(
    const volScalarField& rho,
    const volVectorField& U,
    const surfaceScalarField& phi,
    const surfaceScalarField& rhoPhi,
    const surfaceScalarField& alphaPhi10,
    const twoPhaseMixtureThermo& mixture
)
:
    twoPhaseTransport_(false),
    mixture_(mixture),
    phi_(phi),
    alphaPhi10_(alphaPhi10)
{
    {
        IOdictionary turbulenceProperties
        (
            IOobject
            (
                turbulenceModel::propertiesName,
                U.time().constant(),
                U.db(),
                IOobject::MUST_READ,
                IOobject::NO_WRITE
            )
        );

        const word simulationType
        (
            turbulenceProperties.get<word>("simulationType")
        );

        if (simulationType == "twoPhaseTransport")
        {
            twoPhaseTransport_ = true;
        }
    }

    if (twoPhaseTransport_)
    {
        const volScalarField& alpha1(mixture_.alpha1());
        const volScalarField& alpha2(mixture_.alpha2());

        const tmp<volScalarField> trho1 = mixture_.thermo1().rho();
        const tmp<volScalarField> trho2 = mixture_.thermo2().rho();

        const auto& rho1 = trho1();
        const auto& rho2 = trho2();

        alphaRhoPhi1_ =
        (
            new surfaceScalarField
            (
                IOobject::groupName("alphaRhoPhi", alpha1.group()),
                fvc::interpolate(rho1)*alphaPhi10_
            )
        );

        alphaRhoPhi2_ =
        (
            new surfaceScalarField
            (
                IOobject::groupName("alphaRhoPhi", alpha2.group()),
                fvc::interpolate(rho2)*(phi_ - alphaPhi10_)
            )
        );

        turbulence1_ =
        (
            ThermalDiffusivity<PhaseCompressibleTurbulenceModel<fluidThermo>>
            ::New
            (
                alpha1,
                rho1,
                U,
                alphaRhoPhi1_(),
                phi,
                mixture.thermo1()
            )
        );

        turbulence2_ =
        (
            ThermalDiffusivity<PhaseCompressibleTurbulenceModel<fluidThermo>>
            ::New
            (
                alpha2,
                rho2,
                U,
                alphaRhoPhi2_(),
                phi,
                mixture.thermo2()
            )
        );
    }
    else
    {
        turbulence_ = compressible::turbulenceModel::New
        (
            rho,
            U,
            rhoPhi,
            mixture
        );

        turbulence_->validate();
    }
}


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

Foam::tmp<Foam::volScalarField>
Foam::compressibleInterPhaseTransportModel::alphaEff() const
{
    if (twoPhaseTransport_)
    {
        return
            mixture_.alpha1()*mixture_.thermo1().alphaEff
            (
                turbulence1_->alphat()
            )
          + mixture_.alpha2()*mixture_.thermo2().alphaEff
            (
                turbulence2_->alphat()
            );
    }
    else
    {
        return mixture_.alphaEff(turbulence_->alphat());
    }
}


Foam::tmp<Foam::fvVectorMatrix>
Foam::compressibleInterPhaseTransportModel::divDevRhoReff
(
    volVectorField& U
) const
{
    if (twoPhaseTransport_)
    {
        return
            turbulence1_->divDevRhoReff(U)
          + turbulence2_->divDevRhoReff(U);
    }
    else
    {
        return turbulence_->divDevRhoReff(U);
    }
}


void Foam::compressibleInterPhaseTransportModel::correctPhasePhi()
{
    if (twoPhaseTransport_)
    {
        const tmp<volScalarField> rho1 = mixture_.thermo1().rho();
        const tmp<volScalarField> rho2 = mixture_.thermo2().rho();

        alphaRhoPhi1_.ref() = fvc::interpolate(rho1)*alphaPhi10_;
        alphaRhoPhi2_.ref() = fvc::interpolate(rho2)*(phi_ - alphaPhi10_);
    }
}


void Foam::compressibleInterPhaseTransportModel::correct()
{
    if (twoPhaseTransport_)
    {
        turbulence1_->correct();
        turbulence2_->correct();
    }
    else
    {
        turbulence_->correct();
    }
}


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