HuaXu.C

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    Copyright (C) 2018-2021 OpenCFD Ltd
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License
    This file is part of OpenFOAM.
 
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#include "HuaXu.H"
#include "addToRunTimeSelectionTable.H"
#include "uniformDimensionedFields.H"
#include "phasePairKey.H"
#include "phaseSystem.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace wallBoilingModels
{
namespace CHFModels
{
    defineTypeNameAndDebug(HuaXu, 0);
    addToRunTimeSelectionTable
    (
        CHFSubCoolModel,
        HuaXu,
        dictionary
    );
}
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::wallBoilingModels::CHFModels::HuaXu::HuaXu
(
    const dictionary& dict
)
:
    CHFSubCoolModel(),
    Kburn_(dict.getOrDefault<scalar>("Kburn", 1.5))
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::scalarField>
Foam::wallBoilingModels::CHFModels::HuaXu::CHFSubCool
(
    const phaseModel& liquid,
    const phaseModel& vapor,
    const label patchi,
    const scalarField& Tl,
    const scalarField& Tsatw,
    const scalarField& L
) const
{
    const auto& g =
        liquid.mesh().time().lookupObject<uniformDimensionedVectorField>("g");
 
    const scalarField alphaLiq(liquid.alpha(patchi));
 
    const labelUList& cells = liquid.mesh().boundary()[patchi].faceCells();
 
    const scalarField& pw = liquid.thermo().p().boundaryField()[patchi];
 
    tmp<scalarField> trhoVapor = vapor.thermo().rhoEoS(pw, Tsatw, cells);
    const scalarField& rhoVapor = trhoVapor.ref();
 
    tmp<scalarField> trhoLiq = liquid.thermo().rhoEoS(pw, Tsatw, cells);
    const scalarField& rhoLiq = trhoLiq.ref();
 
 
    tmp<volScalarField> tCp = liquid.thermo().Cp();
    const volScalarField& Cp = tCp();
    const fvPatchScalarField& Cpw = Cp.boundaryField()[patchi];
 
    const phasePairKey pair(liquid.name(), vapor.name());
    const scalarField sigma
    (
        liquid.fluid().sigma(pair)().boundaryField()[patchi]
    );
 
    const scalarField Pe
    (
        pow(sigma, 0.75)
       /
        (
            alphaLiq
          * pow025(mag(g.value())*(rhoLiq-rhoVapor))
          * sqrt(rhoVapor)
        )
    );
 
    const scalarField Ja
    (
        rhoLiq*Cpw*max(Tsatw - Tl, scalar(0))/(rhoVapor*L)
    );
 
    return Kburn_*(scalar(1) + 0.345*Ja/pow025(Pe));
}
 
 
void Foam::wallBoilingModels::CHFModels::HuaXu::write
(
    Ostream& os
) const
{
    CHFSubCoolModel::write(os);
    os.writeEntry("Kburn", Kburn_);
}
 
 
// ************************************************************************* //