inclinedFilmNusseltHeightFvPatchScalarField.C

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    Copyright (C) 2016-2020 OpenCFD Ltd.
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#include "inclinedFilmNusseltHeightFvPatchScalarField.H"
#include "volFields.H"
#include "kinematicSingleLayer.H"
#include "addToRunTimeSelectionTable.H"

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

Foam::inclinedFilmNusseltHeightFvPatchScalarField::
inclinedFilmNusseltHeightFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF
)
:
    fixedValueFvPatchScalarField(p, iF),
    filmRegionName_("surfaceFilmProperties"),
    GammaMean_(),
    a_(),
    omega_()
{}


Foam::inclinedFilmNusseltHeightFvPatchScalarField::
inclinedFilmNusseltHeightFvPatchScalarField
(
    const inclinedFilmNusseltHeightFvPatchScalarField& ptf,
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    fixedValueFvPatchScalarField(ptf, p, iF, mapper),
    filmRegionName_(ptf.filmRegionName_),
    GammaMean_(ptf.GammaMean_.clone()),
    a_(ptf.a_.clone()),
    omega_(ptf.omega_.clone())
{}


Foam::inclinedFilmNusseltHeightFvPatchScalarField::
inclinedFilmNusseltHeightFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
:
    fixedValueFvPatchScalarField(p, iF, dict),
    filmRegionName_
    (
        dict.getOrDefault<word>("filmRegion", "surfaceFilmProperties")
    ),
    GammaMean_(Function1<scalar>::New("GammaMean", dict, &db())),
    a_(Function1<scalar>::New("a", dict, &db())),
    omega_(Function1<scalar>::New("omega", dict, &db()))
{}


Foam::inclinedFilmNusseltHeightFvPatchScalarField::
inclinedFilmNusseltHeightFvPatchScalarField
(
    const inclinedFilmNusseltHeightFvPatchScalarField& wmfrhpsf
)
:
    fixedValueFvPatchScalarField(wmfrhpsf),
    filmRegionName_(wmfrhpsf.filmRegionName_),
    GammaMean_(wmfrhpsf.GammaMean_.clone()),
    a_(wmfrhpsf.a_.clone()),
    omega_(wmfrhpsf.omega_.clone())
{}


Foam::inclinedFilmNusseltHeightFvPatchScalarField::
inclinedFilmNusseltHeightFvPatchScalarField
(
    const inclinedFilmNusseltHeightFvPatchScalarField& wmfrhpsf,
    const DimensionedField<scalar, volMesh>& iF
)
:
    fixedValueFvPatchScalarField(wmfrhpsf, iF),
    filmRegionName_(wmfrhpsf.filmRegionName_),
    GammaMean_(wmfrhpsf.GammaMean_.clone()),
    a_(wmfrhpsf.a_.clone()),
    omega_(wmfrhpsf.omega_.clone())
{}


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

void Foam::inclinedFilmNusseltHeightFvPatchScalarField::updateCoeffs()
{
    if (updated())
    {
        return;
    }

    const label patchi = patch().index();

    // Retrieve the film region from the database

    const regionModels::regionModel& region =
        db().time().lookupObject<regionModels::regionModel>(filmRegionName_);

    const regionModels::surfaceFilmModels::kinematicSingleLayer& film =
        dynamic_cast
        <
            const regionModels::surfaceFilmModels::kinematicSingleLayer&
        >(region);

    // Calculate the vector tangential to the patch

    // Note: normal pointing into the domain
    const vectorField n(-patch().nf());

    const scalarField gTan(film.gTan(patchi) & n);

    if (patch().size() && (max(mag(gTan)) < SMALL))
    {
        WarningInFunction
            << "is designed to operate on patches inclined with respect to "
            << "gravity"
            << endl;
    }

    const volVectorField& nHat = film.nHat();

    const vectorField nHatp(nHat.boundaryField()[patchi].patchInternalField());

    vectorField nTan(nHatp ^ n);
    nTan /= mag(nTan) + ROOTVSMALL;

    // Calculate distance in patch tangential direction

    const vectorField& Cf = patch().Cf();
    scalarField d(nTan & Cf);

    // Calculate the wavy film height

    const scalar t = db().time().timeOutputValue();

    const scalar GMean = GammaMean_->value(t);
    const scalar a = a_->value(t);
    const scalar omega = omega_->value(t);

    const scalarField G(GMean + a*sin(omega*constant::mathematical::twoPi*d));

    const volScalarField& mu = film.mu();
    const scalarField mup(mu.boundaryField()[patchi].patchInternalField());

    const volScalarField& rho = film.rho();
    const scalarField rhop(rho.boundaryField()[patchi].patchInternalField());

    const scalarField Re(max(G, scalar(0))/mup);

    operator==
    (
        cbrt(3*sqr(mup/rhop)/(gTan + ROOTVSMALL))*cbrt(Re)
    );

    fixedValueFvPatchScalarField::updateCoeffs();
}


void Foam::inclinedFilmNusseltHeightFvPatchScalarField::write
(
    Ostream& os
) const
{
    fvPatchField<scalar>::write(os);

    os.writeEntryIfDifferent<word>
    (
        "filmRegion",
        "surfaceFilmProperties",
        filmRegionName_
    );
    GammaMean_->writeData(os);
    a_->writeData(os);
    omega_->writeData(os);

    fvPatchField<scalar>::writeValueEntry(os);
}


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

namespace Foam
{
    makePatchTypeField
    (
        fvPatchScalarField,
        inclinedFilmNusseltHeightFvPatchScalarField
    );
}


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