variableHeightFlowRateInletVelocityFvPatchVectorField.C

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#include "variableHeightFlowRateInletVelocityFvPatchVectorField.H"
#include "addToRunTimeSelectionTable.H"
#include "volFields.H"

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

Foam::variableHeightFlowRateInletVelocityFvPatchVectorField::
variableHeightFlowRateInletVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchField<vector>(p, iF),
    flowRate_(),
    alphaName_("none")
{}


Foam::variableHeightFlowRateInletVelocityFvPatchVectorField::
variableHeightFlowRateInletVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const dictionary& dict
)
:
    fixedValueFvPatchField<vector>(p, iF, dict),
    flowRate_(Function1<scalar>::New("flowRate", dict)),
    alphaName_(dict.lookup("alpha"))
{}


Foam::variableHeightFlowRateInletVelocityFvPatchVectorField::
variableHeightFlowRateInletVelocityFvPatchVectorField
(
    const variableHeightFlowRateInletVelocityFvPatchVectorField& ptf,
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    fixedValueFvPatchField<vector>(ptf, p, iF, mapper),
    flowRate_(ptf.flowRate_, false),
    alphaName_(ptf.alphaName_)
{}


Foam::variableHeightFlowRateInletVelocityFvPatchVectorField::
variableHeightFlowRateInletVelocityFvPatchVectorField
(
    const variableHeightFlowRateInletVelocityFvPatchVectorField& ptf,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchField<vector>(ptf, iF),
    flowRate_(ptf.flowRate_, false),
    alphaName_(ptf.alphaName_)
{}


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

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

    scalarField alphap =
        patch().lookupPatchField<volScalarField, scalar>(alphaName_);

    alphap = max(alphap, scalar(0));
    alphap = min(alphap, scalar(1));

    const scalar t = db().time().userTimeValue();
    scalar flowRate = flowRate_->value(t);

    // a simpler way of doing this would be nice
    scalar avgU = -flowRate/gSum(patch().magSf()*alphap);

    vectorField n(patch().nf());

    operator==(n*avgU*alphap);

    fixedValueFvPatchField<vector>::updateCoeffs();
}


void Foam::variableHeightFlowRateInletVelocityFvPatchVectorField::write
(
    Ostream& os
) const
{
    fvPatchField<vector>::write(os);
    writeEntry(os, flowRate_());
    writeEntry(os, "alpha", alphaName_);
    writeEntry(os, "value", *this);
}


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

namespace Foam
{
   makePatchTypeField
   (
       fvPatchVectorField,
       variableHeightFlowRateInletVelocityFvPatchVectorField
   );
}


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