incompressibleThreePhaseMixture.C

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#include "incompressibleThreePhaseMixture.H"
#include "addToRunTimeSelectionTable.H"
#include "surfaceFields.H"
#include "fvc.H"

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

void Foam::incompressibleThreePhaseMixture::calcNu()
{
    nuModel1_->correct();
    nuModel2_->correct();
    nuModel3_->correct();

    // Average kinematic viscosity calculated from dynamic viscosity
    nu_ = mu()/(alpha1_*rho1_ + alpha2_*rho2_ + alpha3_*rho3_);
}


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

Foam::incompressibleThreePhaseMixture::incompressibleThreePhaseMixture
(
    const volVectorField& U,
    const surfaceScalarField& phi
)
:
    IOdictionary
    (
        IOobject
        (
            "phaseProperties",
            U.time().constant(),
            U.db(),
            IOobject::MUST_READ_IF_MODIFIED,
            IOobject::NO_WRITE
        )
    ),

    phase1Name_(wordList(lookup("phases"))[0]),
    phase2Name_(wordList(lookup("phases"))[1]),
    phase3Name_(wordList(lookup("phases"))[2]),

    alpha1_
    (
        IOobject
        (
            IOobject::groupName("alpha", phase1Name_),
            U.time().timeName(),
            U.mesh(),
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        U.mesh()
    ),

    alpha2_
    (
        IOobject
        (
            IOobject::groupName("alpha", phase2Name_),
            U.time().timeName(),
            U.mesh(),
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        U.mesh()
    ),

    alpha3_
    (
        IOobject
        (
            IOobject::groupName("alpha", phase3Name_),
            U.time().timeName(),
            U.mesh(),
            IOobject::MUST_READ,
            IOobject::AUTO_WRITE
        ),
        U.mesh()
    ),

    U_(U),
    phi_(phi),

    nu_
    (
        IOobject
        (
            "nu",
            U.time().timeName(),
            U.db()
        ),
        U.mesh(),
        dimensionedScalar(dimensionSet(0, 2, -1, 0, 0), 0),
        calculatedFvPatchScalarField::typeName
    ),

    nuModel1_(viscosityModel::New(U.mesh(), phase1Name_)),
    nuModel2_(viscosityModel::New(U.mesh(), phase2Name_)),
    nuModel3_(viscosityModel::New(U.mesh(), phase3Name_)),

    rho1_("rho", dimDensity, nuModel1_()),
    rho2_("rho", dimDensity, nuModel2_()),
    rho3_("rho", dimDensity, nuModel3_())
{
    alpha3_ == 1.0 - alpha1_ - alpha2_;
    calcNu();
}


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

Foam::tmp<Foam::volScalarField>
Foam::incompressibleThreePhaseMixture::mu() const
{
    return volScalarField::New
    (
        "mu",
        alpha1_*rho1_*nuModel1_->nu()
      + alpha2_*rho2_*nuModel2_->nu()
      + alpha3_*rho3_*nuModel3_->nu()
    );
}


Foam::tmp<Foam::surfaceScalarField>
Foam::incompressibleThreePhaseMixture::muf() const
{
    surfaceScalarField alpha1f(fvc::interpolate(alpha1_));
    surfaceScalarField alpha2f(fvc::interpolate(alpha2_));
    surfaceScalarField alpha3f(fvc::interpolate(alpha3_));

    return surfaceScalarField::New
    (
        "mu",
        alpha1f*rho1_*fvc::interpolate(nuModel1_->nu())
      + alpha2f*rho2_*fvc::interpolate(nuModel2_->nu())
      + alpha3f*rho3_*fvc::interpolate(nuModel3_->nu())
    );
}


Foam::tmp<Foam::surfaceScalarField>
Foam::incompressibleThreePhaseMixture::nuf() const
{
    surfaceScalarField alpha1f(fvc::interpolate(alpha1_));
    surfaceScalarField alpha2f(fvc::interpolate(alpha2_));
    surfaceScalarField alpha3f(fvc::interpolate(alpha3_));

    return surfaceScalarField::New
    (
        "nu",
        (
            alpha1f*rho1_*fvc::interpolate(nuModel1_->nu())
          + alpha2f*rho2_*fvc::interpolate(nuModel2_->nu())
          + alpha3f*rho3_*fvc::interpolate(nuModel3_->nu())
        )/(alpha1f*rho1_ + alpha2f*rho2_ + alpha3f*rho3_)
    );
}


bool Foam::incompressibleThreePhaseMixture::read()
{
    if (regIOobject::read())
    {
        nuModel1_->lookup("rho") >> rho1_;
        nuModel2_->lookup("rho") >> rho2_;
        nuModel3_->lookup("rho") >> rho3_;

        return true;
    }
    else
    {
        return false;
    }
}


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