Bromley.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 "Bromley.H"
#include "addToRunTimeSelectionTable.H"
#include "uniformDimensionedFields.H"
#include "constants.H"
 
using namespace Foam::constant;
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace wallBoilingModels
{
namespace filmBoilingModels
{
    defineTypeNameAndDebug(Bromley, 0);
    addToRunTimeSelectionTable
    (
        filmBoilingModel,
        Bromley,
        dictionary
    );
}
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::wallBoilingModels::filmBoilingModels::Bromley::Bromley
(
    const dictionary& dict
)
:
    filmBoilingModel(),
    Cn_(dict.getOrDefault<scalar>("Cn", 0.62)),
    emissivity_(dict.getOrDefault<scalar>("emissivity", 1)),
    L_(dict.get<scalar>("L"))
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::scalarField>
Foam::wallBoilingModels::filmBoilingModels::Bromley::htcFilmBoil
(
    const phaseModel& liquid,
    const phaseModel& vapor,
    const label patchi,
    const scalarField& Tl,
    const scalarField& Tsatw,
    const scalarField& L
) const
{
    const fvPatchScalarField& Tw =
        liquid.thermo().T().boundaryField()[patchi];
    const auto& g =
        liquid.mesh().time().lookupObject<uniformDimensionedVectorField>("g");
 
    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();
 
 
    const scalarField kappaVapor(vapor.kappa(patchi));
 
    tmp<scalarField> tCp = vapor.thermo().Cp(pw, Tsatw, cells);
    const scalarField& CpVapor = tCp();
 
    const scalarField muVapor(vapor.mu(patchi));
 
    const scalarField htcRad
    (
        emissivity_*physicoChemical::sigma.value()*(pow4(Tw) - pow4(Tsatw))
      / max((Tw - Tsatw), scalar(1e-4))
    );
 
    return
        Cn_*pow025
        (
            pow3(kappaVapor)
           *rhoVapor*(rhoLiq - rhoVapor)*mag(g.value())
           *(L + scalar(0.4)*CpVapor*max((Tw-Tsatw), scalar(0)))
           /(L_*muVapor*max((Tw-Tsatw), scalar(1e-4)))
        ) + scalar(0.75)*htcRad;
}
 
 
void Foam::wallBoilingModels::filmBoilingModels::Bromley::write
(
    Ostream& os
) const
{
    filmBoilingModel::write(os);
    os.writeEntry("Cn", Cn_);
    os.writeEntry("L", L_);
    os.writeEntry("emissivity", emissivity_);
}
 
 
// ************************************************************************* //