turbulentTemperatureCoupledBaffleMixedFvPatchScalarField.C

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#include "turbulentTemperatureCoupledBaffleMixedFvPatchScalarField.H"
#include "addToRunTimeSelectionTable.H"
#include "fvPatchFieldMapper.H"
#include "volFields.H"
#include "mappedPatchBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace compressible
{
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mixedFvPatchScalarField(p, iF),
    temperatureCoupledBase
    (
        patch(),
        "undefined",
        "undefined",
        "undefined-K",
        "undefined-alpha"
    ),
    TnbrName_("undefined-Tnbr"),
    thicknessLayers_(0),
    kappaLayers_(0),
    contactRes_(0)
{
    this->refValue() = 0.0;
    this->refGrad() = 0.0;
    this->valueFraction() = 1.0;
}
 
 
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
(
    const turbulentTemperatureCoupledBaffleMixedFvPatchScalarField& ptf,
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    mixedFvPatchScalarField(ptf, p, iF, mapper),
    temperatureCoupledBase(patch(), ptf),
    TnbrName_(ptf.TnbrName_),
    thicknessLayers_(ptf.thicknessLayers_),
    kappaLayers_(ptf.kappaLayers_),
    contactRes_(ptf.contactRes_)
{}
 
 
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
:
    mixedFvPatchScalarField(p, iF),
    temperatureCoupledBase(patch(), dict),
    TnbrName_(dict.get<word>("Tnbr")),
    thicknessLayers_(0),
    kappaLayers_(0),
    contactRes_(0.0)
{
    if (!isA<mappedPatchBase>(this->patch().patch()))
    {
        FatalErrorInFunction
            << "' not type '" << mappedPatchBase::typeName << "'"
            << "\n    for patch " << p.name()
            << " of field " << internalField().name()
            << " in file " << internalField().objectPath()
            << exit(FatalError);
    }
 
    if (dict.readIfPresent("thicknessLayers", thicknessLayers_))
    {
        dict.readEntry("kappaLayers", kappaLayers_);
 
        if (thicknessLayers_.size() > 0)
        {
            // Calculate effective thermal resistance by harmonic averaging
            forAll(thicknessLayers_, iLayer)
            {
                contactRes_ += thicknessLayers_[iLayer]/kappaLayers_[iLayer];
            }
            contactRes_ = 1.0/contactRes_;
        }
    }
 
    fvPatchScalarField::operator=(scalarField("value", dict, p.size()));
 
    if (dict.found("refValue"))
    {
        // Full restart
        refValue() = scalarField("refValue", dict, p.size());
        refGrad() = scalarField("refGradient", dict, p.size());
        valueFraction() = scalarField("valueFraction", dict, p.size());
    }
    else
    {
        // Start from user entered data. Assume fixedValue.
        refValue() = *this;
        refGrad() = 0.0;
        valueFraction() = 1.0;
    }
}
 
 
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::
turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
(
    const turbulentTemperatureCoupledBaffleMixedFvPatchScalarField& wtcsf,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mixedFvPatchScalarField(wtcsf, iF),
    temperatureCoupledBase(patch(), wtcsf),
    TnbrName_(wtcsf.TnbrName_),
    thicknessLayers_(wtcsf.thicknessLayers_),
    kappaLayers_(wtcsf.kappaLayers_),
    contactRes_(wtcsf.contactRes_)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::updateCoeffs()
{
    if (updated())
    {
        return;
    }
 
    // Since we're inside initEvaluate/evaluate there might be processor
    // comms underway. Change the tag we use.
    int oldTag = UPstream::msgType();
    UPstream::msgType() = oldTag+1;
 
    // Get the coupling information from the mappedPatchBase
    const mappedPatchBase& mpp =
        refCast<const mappedPatchBase>(patch().patch());
    const polyMesh& nbrMesh = mpp.sampleMesh();
    const label samplePatchi = mpp.samplePolyPatch().index();
    const fvPatch& nbrPatch =
        refCast<const fvMesh>(nbrMesh).boundary()[samplePatchi];
 
    // Calculate the temperature by harmonic averaging
    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
    const turbulentTemperatureCoupledBaffleMixedFvPatchScalarField& nbrField =
    refCast
    <
        const turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
    >
    (
        nbrPatch.lookupPatchField<volScalarField, scalar>
        (
            TnbrName_
        )
    );
 
    // Swap to obtain full local values of neighbour internal field
    tmp<scalarField> nbrIntFld(new scalarField(nbrField.size(), Zero));
    tmp<scalarField> nbrKDelta(new scalarField(nbrField.size(), Zero));
 
    if (contactRes_ == 0.0)
    {
        nbrIntFld.ref() = nbrField.patchInternalField();
        nbrKDelta.ref() = nbrField.kappa(nbrField)*nbrPatch.deltaCoeffs();
    }
    else
    {
        nbrIntFld.ref() = nbrField;
        nbrKDelta.ref() = contactRes_;
    }
 
    mpp.distribute(nbrIntFld.ref());
    mpp.distribute(nbrKDelta.ref());
 
    tmp<scalarField> myKDelta = kappa(*this)*patch().deltaCoeffs();
 
 
    // Both sides agree on
    // - temperature : (myKDelta*fld + nbrKDelta*nbrFld)/(myKDelta+nbrKDelta)
    // - gradient    : (temperature-fld)*delta
    // We've got a degree of freedom in how to implement this in a mixed bc.
    // (what gradient, what fixedValue and mixing coefficient)
    // Two reasonable choices:
    // 1. specify above temperature on one side (preferentially the high side)
    //    and above gradient on the other. So this will switch between pure
    //    fixedvalue and pure fixedgradient
    // 2. specify gradient and temperature such that the equations are the
    //    same on both sides. This leads to the choice of
    //    - refGradient = zero gradient
    //    - refValue = neighbour value
    //    - mixFraction = nbrKDelta / (nbrKDelta + myKDelta())
 
    this->refValue() = nbrIntFld();
    this->refGrad() = 0.0;
    this->valueFraction() = nbrKDelta()/(nbrKDelta() + myKDelta());
 
    mixedFvPatchScalarField::updateCoeffs();
 
    if (debug)
    {
        scalar Q = gSum(kappa(*this)*patch().magSf()*snGrad());
 
        Info<< patch().boundaryMesh().mesh().name() << ':'
            << patch().name() << ':'
            << this->internalField().name() << " <- "
            << nbrMesh.name() << ':'
            << nbrPatch.name() << ':'
            << this->internalField().name() << " :"
            << " heat transfer rate:" << Q
            << " walltemperature "
            << " min:" << gMin(*this)
            << " max:" << gMax(*this)
            << " avg:" << gAverage(*this)
            << endl;
    }
 
    // Restore tag
    UPstream::msgType() = oldTag;
}
 
 
void turbulentTemperatureCoupledBaffleMixedFvPatchScalarField::write
(
    Ostream& os
) const
{
    mixedFvPatchScalarField::write(os);
    os.writeEntry("Tnbr", TnbrName_);
    thicknessLayers_.writeEntry("thicknessLayers", os);
    kappaLayers_.writeEntry("kappaLayers", os);
 
    temperatureCoupledBase::write(os);
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
makePatchTypeField
(
    fvPatchScalarField,
    turbulentTemperatureCoupledBaffleMixedFvPatchScalarField
);
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace compressible
} // End namespace Foam
 
 
// ************************************************************************* //