variableHeatTransfer.C

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    Copyright (C) 2020 OpenCFD Ltd.
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    This file is part of OpenFOAM.
 
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#include "variableHeatTransfer.H"
#include "turbulentFluidThermoModel.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(variableHeatTransfer, 0);
    addToRunTimeSelectionTable
    (
        option,
        variableHeatTransfer,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::variableHeatTransfer::variableHeatTransfer
(
    const word& name,
    const word& modelType,
    const dictionary& dict,
    const fvMesh& mesh
)
:
    interRegionHeatTransferModel(name, modelType, dict, mesh),
    UNbrName_(coeffs_.getOrDefault<word>("UNbr", "U")),
    a_(0),
    b_(0),
    c_(0),
    ds_(0),
    Pr_(0),
    AoV_()
{
    if (master_)
    {
        coeffs_.readEntry("a", a_);
        coeffs_.readEntry("b", b_);
        coeffs_.readEntry("c", c_);
        coeffs_.readEntry("ds", ds_);
        coeffs_.readEntry("Pr", Pr_);
 
        AoV_.reset
        (
            new volScalarField
            (
                IOobject
                (
                    "AoV",
                    mesh_.time().timeName(),
                    mesh_,
                    IOobject::MUST_READ,
                    IOobject::AUTO_WRITE
                ),
                mesh_
            )
        );
    }
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::fv::variableHeatTransfer::calculateHtc()
{
    const fvMesh& nbrMesh =
        mesh_.time().lookupObject<fvMesh>(nbrRegionName());
 
    const compressible::turbulenceModel& nbrTurb =
        nbrMesh.lookupObject<compressible::turbulenceModel>
        (
            turbulenceModel::propertiesName
        );
 
    const fluidThermo& nbrThermo =
        nbrMesh.lookupObject<fluidThermo>(basicThermo::dictName);
 
    const volVectorField& UNbr =
        nbrMesh.lookupObject<volVectorField>(UNbrName_);
 
    const volScalarField ReNbr(mag(UNbr)*ds_*nbrThermo.rho()/nbrTurb.mut());
 
    const volScalarField NuNbr(a_*pow(ReNbr, b_)*pow(Pr_, c_));
 
    const scalarField htcNbr(NuNbr*nbrTurb.kappaEff()/ds_);
 
    const scalarField htcNbrMapped(interpolate(htcNbr));
 
    htc_.primitiveFieldRef() = htcNbrMapped * AoV_();
}
 
 
bool Foam::fv::variableHeatTransfer::read(const dictionary& dict)
{
    if (interRegionHeatTransferModel::read(dict))
    {
        coeffs_.readIfPresent("UNbr", UNbrName_);
 
        coeffs_.readIfPresent("a", a_);
        coeffs_.readIfPresent("b", b_);
        coeffs_.readIfPresent("c", c_);
        coeffs_.readIfPresent("ds", ds_);
        coeffs_.readIfPresent("Pr", Pr_);
 
        return true;
    }
 
    return false;
}
 
 
// ************************************************************************* //