externalHeatFluxSource.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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     \\/     M anipulation  |
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    Copyright (C) 2019-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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#include "externalHeatFluxSource.H"
#include "fam.H"
#include "faScalarMatrix.H"
#include "physicoChemicalConstants.H"
#include "zeroGradientFaPatchFields.H"
#include "addToRunTimeSelectionTable.H"
 
using Foam::constant::physicoChemical::sigma;
 
// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
namespace Foam
{
namespace fa
{
    defineTypeNameAndDebug(externalHeatFluxSource, 0);
    addToRunTimeSelectionTable(option, externalHeatFluxSource, dictionary);
}
}
 
 
const Foam::Enum
<
    Foam::fa::externalHeatFluxSource::operationMode
>
Foam::fa::externalHeatFluxSource::operationModeNames
({
    { operationMode::fixedPower, "power" },
    { operationMode::fixedHeatFlux, "flux" },
    { operationMode::fixedHeatTransferCoeff, "coefficient" },
});
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fa::externalHeatFluxSource::externalHeatFluxSource
(
    const word& sourceName,
    const word& modelType,
    const dictionary& dict,
    const fvPatch& patch
)
:
    fa::faceSetOption(sourceName, modelType, dict, patch),
    mode_(operationModeNames.get("mode", dict)),
    TName_(dict.getOrDefault<word>("T", "T")),
    Q_(0),
    q_(0),
    h_(0),
    Ta_(nullptr),
    emissivity_(dict.getOrDefault<scalar>("emissivity", 0))
{
    fieldNames_.resize(1, TName_);
 
    fa::option::resetApplied();
 
    read(dict);
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::fa::externalHeatFluxSource::addSup
(
    const areaScalarField& h,
    const areaScalarField& rho,
    faMatrix<scalar>& eqn,
    const label fieldi
)
{
    if (isActive())
    {
        DebugInfo<< name() << ": applying source to "
            << eqn.psi().name() << endl;
 
        IOobject io
        (
            "Q",
            mesh_.time().timeName(),
            mesh_,
            IOobject::NO_READ,
            IOobject::NO_WRITE,
            false
        );
 
        auto tQ = new areaScalarField
        (
            io,
            regionMesh(),
            dimensionedScalar("q", dimPower/sqr(dimLength), 0),
            zeroGradientFaPatchScalarField::typeName
        );
        areaScalarField& Q = *tQ;
 
        switch (mode_)
        {
            case fixedPower:
            {
                Q.primitiveFieldRef() = Q_/regionMesh().S().field();
                eqn += Q;
 
                break;
            }
            case fixedHeatFlux:
            {
                Q.primitiveFieldRef() = q_;
                eqn += Q;
                break;
            }
            case fixedHeatTransferCoeff:
            {
                const dimensionedScalar Ta
                (
                    "Ta",
                    dimTemperature,
                    Ta_->value(mesh_.time().timeOutputValue())
                );
 
                areaScalarField hp
                (
                    io,
                    regionMesh(),
                    dimensionedScalar
                    (
                        "h",
                        dimPower/sqr(dimLength)/dimTemperature,
                        h_
                    )
                );
 
                const areaScalarField hpTa(hp*Ta);
 
                if (emissivity_ > 0)
                {
                    hp -= emissivity_*sigma.value()*pow3(eqn.psi());
                }
 
                eqn -= fam::SuSp(hp, eqn.psi()) - hpTa;
 
            }
        }
    }
}
 
 
bool Foam::fa::externalHeatFluxSource::read(const dictionary& dict)
{
    if (fa::option::read(dict))
    {
        dict.readIfPresent("T", TName_);
        dict.readIfPresent("emissivity", emissivity_);
 
        mode_ = operationModeNames.get("mode", dict);
 
        switch (mode_)
        {
            case fixedPower:
            {
                dict.readEntry("Q", Q_);
                break;
            }
            case fixedHeatFlux:
            {
                dict.readEntry("q", q_);
                break;
            }
            case fixedHeatTransferCoeff:
            {
                dict.readEntry("h", h_);
                Ta_ = Function1<scalar>::New("Ta", dict, &mesh_);
                break;
            }
        }
 
        return true;
    }
 
     return false;
}
 
 
// ************************************************************************* //