semiPermeableBaffleMassFractionFvPatchScalarField.C

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#include "semiPermeableBaffleMassFractionFvPatchScalarField.H"
#include "fvPatchFieldMapper.H"
#include "volFields.H"
#include "surfaceFields.H"
#include "thermophysicalTransportModel.H"
#include "basicSpecieMixture.H"
#include "addToRunTimeSelectionTable.H"

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

Foam::semiPermeableBaffleMassFractionFvPatchScalarField::
semiPermeableBaffleMassFractionFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mappedPatchBase(p.patch()),
    specieTransferMassFractionFvPatchScalarField(p, iF)
{}


Foam::semiPermeableBaffleMassFractionFvPatchScalarField::
semiPermeableBaffleMassFractionFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
:
    mappedPatchBase(p.patch(), NEARESTPATCHFACE, dict),
    specieTransferMassFractionFvPatchScalarField(p, iF, dict)
{}


Foam::semiPermeableBaffleMassFractionFvPatchScalarField::
semiPermeableBaffleMassFractionFvPatchScalarField
(
    const semiPermeableBaffleMassFractionFvPatchScalarField& ptf,
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    mappedPatchBase(p.patch(), ptf),
    specieTransferMassFractionFvPatchScalarField(ptf, p, iF, mapper)
{}


Foam::semiPermeableBaffleMassFractionFvPatchScalarField::
semiPermeableBaffleMassFractionFvPatchScalarField
(
    const semiPermeableBaffleMassFractionFvPatchScalarField& ptf,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mappedPatchBase(ptf.patch().patch(), ptf),
    specieTransferMassFractionFvPatchScalarField(ptf, iF)
{}


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

Foam::tmp<Foam::scalarField>
Foam::semiPermeableBaffleMassFractionFvPatchScalarField::calcPhiYp() const
{
    if (c_ == scalar(0))
    {
        return tmp<scalarField>(new scalarField(patch().size(), Zero));
    }

    const word& YName = internalField().name();

    const fvPatch& nbrPatch = patch().boundaryMesh()[samplePolyPatch().index()];

    const fluidThermo& thermo =
        db().lookupObject<fluidThermo>(fluidThermo::dictName);

    // Get the cell-mass fractions
    const scalarField Yc(patchInternalField());
    scalarField nbrYc
    (
        nbrPatch.lookupPatchField<volScalarField, scalar>(YName)
       .patchInternalField()
    );
    mappedPatchBase::map().distribute(nbrYc);

    // Get the patch delta coefficients multiplied by the diffusivity
    const thermophysicalTransportModel& ttm =
        db().lookupObject<thermophysicalTransportModel>
        (
            thermophysicalTransportModel::typeName
        );
    const scalarField alphaEffDeltap
    (
        ttm.alphaEff(patch().index())*patch().deltaCoeffs()
    );
    scalarField nbrAlphaEffDeltap
    (
        ttm.alphaEff(nbrPatch.index())*nbrPatch.deltaCoeffs()
    );
    mappedPatchBase::map().distribute(nbrAlphaEffDeltap);

    // Get the specie molecular weight, if needed
    scalar Wi = NaN;
    if (property_ != massFraction)
    {
        const basicSpecieMixture& mixture = composition(db());
        Wi = mixture.Wi(mixture.species()[YName]);
    }

    // Get the mixture molecular weights, if needed
    tmp<scalarField> tW, tNbrW;
    if (property_ == moleFraction || property_ == partialPressure)
    {
        tW = thermo.W(patch().index());
        tNbrW = thermo.W(nbrPatch.index());
        mappedPatchBase::map().distribute(tNbrW.ref());
    }

    // Construct coefficients that convert mass fraction to the property that
    // drives the transfer
    scalarField k(patch().size(), 1), nbrK(patch().size(), 1);
    switch(property_)
    {
        case massFraction:
            break;

        case moleFraction:
            k *= tW/Wi;
            nbrK *= tNbrW/Wi;
            break;

        case molarConcentration:
            {
                k *= thermo.rho(patch().index())/Wi;
                scalarField nbrRhop(thermo.rho(nbrPatch.index()));
                mappedPatchBase::map().distribute(nbrRhop);
                nbrK *= nbrRhop/Wi;
            }
            break;

        case partialPressure:
            {
                k *= thermo.p().boundaryField()[patch().index()]*tW/Wi;
                scalarField nbrPp(thermo.p().boundaryField()[nbrPatch.index()]);
                mappedPatchBase::map().distribute(nbrPp);
                nbrK *= nbrPp*tNbrW/Wi;
            }
            break;
    }

    // The transport is limited by both the difference in the amount of the
    // specie across the baffle and the rates of diffusion on either side. The
    // coefficients associated with these three transfer process are
    // harmonically averaged to represent this limiting.
    return
        patch().magSf()
       /(1/c_ + k/alphaEffDeltap + nbrK/nbrAlphaEffDeltap)
       *(k*Yc - nbrK*nbrYc);
}


void Foam::semiPermeableBaffleMassFractionFvPatchScalarField::write
(
    Ostream& os
) const
{
    mappedPatchBase::write(os);
    specieTransferMassFractionFvPatchScalarField::write(os);
    writeEntry(os, "value", *this);
}


// * * * * * * * * * * * * * * Build Macro Function  * * * * * * * * * * * * //

namespace Foam
{
    makePatchTypeField
    (
        fvPatchScalarField,
        semiPermeableBaffleMassFractionFvPatchScalarField
    );
}

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