NonRandomTwoLiquid.C

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#include "NonRandomTwoLiquid.H"

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

template<class Thermo, class OtherThermo>
Foam::interfaceCompositionModels::NonRandomTwoLiquid<Thermo, OtherThermo>::
NonRandomTwoLiquid
(
    const dictionary& dict,
    const phasePair& pair
)
:
    InterfaceCompositionModel<Thermo, OtherThermo>(dict, pair),
    gamma1_
    (
        IOobject
        (
            IOobject::groupName("gamma1", pair.name()),
            pair.phase1().mesh().time().timeName(),
            pair.phase1().mesh()
        ),
        pair.phase1().mesh(),
        dimensionedScalar("one", dimless, 1)
    ),
    gamma2_
    (
        IOobject
        (
            IOobject::groupName("gamma2", pair.name()),
            pair.phase1().mesh().time().timeName(),
            pair.phase1().mesh()
        ),
        pair.phase1().mesh(),
        dimensionedScalar("one", dimless, 1)
    ),
    alpha12_("alpha12", dimless, Zero),
    alpha21_("alpha21", dimless, Zero),
    beta12_("beta12", dimless/dimTemperature, Zero),
    beta21_("beta21", dimless/dimTemperature, Zero)
{
    if (this->speciesNames_.size() != 2)
    {
        FatalErrorInFunction
            << "NonRandomTwoLiquid model is suitable for two species only."
            << exit(FatalError);
    }

    species1Name_ = this->speciesNames_[0];
    species2Name_ = this->speciesNames_[1];

    species1Index_ = this->thermo_.composition().species().find(species1Name_);
    species2Index_ = this->thermo_.composition().species().find(species2Name_);

    alpha12_.read("alpha", dict.subDict(species1Name_));
    alpha21_.read("alpha", dict.subDict(species2Name_));
    beta12_.read("beta", dict.subDict(species1Name_));
    beta21_.read("beta", dict.subDict(species2Name_));

    saturationModel12_.reset
    (
        saturationModel::New
        (
            dict.subDict(species1Name_).subDict("interaction"),
            pair.phase1().mesh()
        ).ptr()
    );
    saturationModel21_.reset
    (
        saturationModel::New
        (
            dict.subDict(species2Name_).subDict("interaction"),
            pair.phase1().mesh()
        ).ptr()
    );

    speciesModel1_.reset
    (
        interfaceCompositionModel::New
        (
            dict.subDict(species1Name_),
            pair
        ).ptr()
    );

    speciesModel2_.reset
    (
        interfaceCompositionModel::New
        (
            dict.subDict(species2Name_),
            pair
        ).ptr()
    );
}


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

template<class Thermo, class OtherThermo>
Foam::interfaceCompositionModels::NonRandomTwoLiquid<Thermo, OtherThermo>::
~NonRandomTwoLiquid()
{}


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

template<class Thermo, class OtherThermo>
void
Foam::interfaceCompositionModels::NonRandomTwoLiquid<Thermo, OtherThermo>::
update
(
    const volScalarField& Tf
)
{
    volScalarField W(this->thermo_.W());

    volScalarField X1
    (
        this->thermo_.composition().Y(species1Index_)
       *W
       /dimensionedScalar
        (
            "W",
            dimMass/dimMoles,
            this->thermo_.composition().W(species1Index_)
        )
    );

    volScalarField X2
    (
        this->thermo_.composition().Y(species2Index_)
       *W
       /dimensionedScalar
        (
            "W",
            dimMass/dimMoles,
            this->thermo_.composition().W(species2Index_)
        )
    );

    volScalarField alpha12(alpha12_ + Tf*beta12_);
    volScalarField alpha21(alpha21_ + Tf*beta21_);

    volScalarField tau12(saturationModel12_->lnPSat(Tf));
    volScalarField tau21(saturationModel21_->lnPSat(Tf));

    volScalarField G12(exp(- alpha12*tau12));
    volScalarField G21(exp(- alpha21*tau21));

    gamma1_ =
        exp
        (
            sqr(X2)
           *(
                tau21*sqr(G21)/max(sqr(X1 + X2*G21), SMALL)
              + tau12*G12/max(sqr(X2 + X1*G12), SMALL)
            )
        );
    gamma2_ =
        exp
        (
            sqr(X1)
           *(
                tau12*sqr(G12)/max(sqr(X2 + X1*G12), SMALL)
              + tau21*G21/max(sqr(X1 + X2*G21), SMALL)
            )
        );
}


template<class Thermo, class OtherThermo>
Foam::tmp<Foam::volScalarField>
Foam::interfaceCompositionModels::NonRandomTwoLiquid<Thermo, OtherThermo>::Yf
(
    const word& speciesName,
    const volScalarField& Tf
) const
{
    if (speciesName == species1Name_)
    {
        return
            this->otherThermo_.composition().Y(speciesName)
           *speciesModel1_->Yf(speciesName, Tf)
           *gamma1_;
    }
    else if (speciesName == species2Name_)
    {
        return
            this->otherThermo_.composition().Y(speciesName)
           *speciesModel2_->Yf(speciesName, Tf)
           *gamma2_;
    }
    else
    {
        return
            this->thermo_.composition().Y(speciesName)
           *(scalar(1) - Yf(species1Name_, Tf) - Yf(species2Name_, Tf));
    }
}


template<class Thermo, class OtherThermo>
Foam::tmp<Foam::volScalarField>
Foam::interfaceCompositionModels::NonRandomTwoLiquid<Thermo, OtherThermo>::
YfPrime
(
    const word& speciesName,
    const volScalarField& Tf
) const
{
    if (speciesName == species1Name_)
    {
        return
            this->otherThermo_.composition().Y(speciesName)
           *speciesModel1_->YfPrime(speciesName, Tf)
           *gamma1_;
    }
    else if (speciesName == species2Name_)
    {
        return
            this->otherThermo_.composition().Y(speciesName)
           *speciesModel2_->YfPrime(speciesName, Tf)
           *gamma2_;
    }
    else
    {
        return
          - this->thermo_.composition().Y(speciesName)
           *(YfPrime(species1Name_, Tf) + YfPrime(species2Name_, Tf));
    }
}


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