constant.C

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    Copyright (C) 2016-2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "constant.H"
#include "addToRunTimeSelectionTable.H"
#include "fvcGrad.H"
#include "twoPhaseMixtureEThermo.H"
#include "fvmSup.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace temperaturePhaseChangeTwoPhaseMixtures
{
    defineTypeNameAndDebug(constant, 0);
    addToRunTimeSelectionTable
    (
        temperaturePhaseChangeTwoPhaseMixture,
        constant,
        components
    );
}
}
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::constant
(
    const thermoIncompressibleTwoPhaseMixture& mixture,
    const fvMesh& mesh
)
:
    temperaturePhaseChangeTwoPhaseMixture(mixture, mesh),
    coeffC_
    (
        "coeffC",
        dimless/dimTime/dimTemperature,
        optionalSubDict(type() + "Coeffs")
    ),
    coeffE_
    (
        "coeffE",
        dimless/dimTime/dimTemperature,
        optionalSubDict(type() + "Coeffs")
    )
{}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
Foam::Pair<Foam::tmp<Foam::volScalarField>>
Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::mDotAlphal() const
{
    const volScalarField& T = mesh_.lookupObject<volScalarField>("T");
 
    const twoPhaseMixtureEThermo& thermo =
        refCast<const twoPhaseMixtureEThermo>
        (
            mesh_.lookupObject<basicThermo>(basicThermo::dictName)
        );
 
    const dimensionedScalar& TSat = thermo.TSat();
 
    const dimensionedScalar T0(dimTemperature, Zero);
 
    return Pair<tmp<volScalarField>>
    (
        coeffC_*mixture_.rho2()*max(TSat - T, T0),
       -coeffE_*mixture_.rho1()*max(T - TSat, T0)
    );
}
 
 
Foam::Pair<Foam::tmp<Foam::volScalarField>>
Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::mDot() const
{
 
    volScalarField limitedAlpha1
    (
        min(max(mixture_.alpha1(), scalar(0)), scalar(1))
    );
 
    volScalarField limitedAlpha2
    (
        min(max(mixture_.alpha2(), scalar(0)), scalar(1))
    );
 
    const volScalarField& T = mesh_.lookupObject<volScalarField>("T");
 
    const twoPhaseMixtureEThermo& thermo =
        refCast<const twoPhaseMixtureEThermo>
        (
            mesh_.lookupObject<basicThermo>(basicThermo::dictName)
        );
 
    const dimensionedScalar& TSat = thermo.TSat();
 
    const dimensionedScalar T0(dimTemperature, Zero);
 
    volScalarField mDotE
    (
        "mDotE", coeffE_*mixture_.rho1()*limitedAlpha1*max(T - TSat, T0)
    );
    volScalarField mDotC
    (
        "mDotC", coeffC_*mixture_.rho2()*limitedAlpha2*max(TSat - T, T0)
    );
 
    if (mesh_.time().outputTime())
    {
        mDotC.write();
        mDotE.write();
    }
 
    return Pair<tmp<volScalarField>>
    (
        tmp<volScalarField>(new volScalarField(mDotC)),
        tmp<volScalarField>(new volScalarField(-mDotE))
    );
}
 
 
Foam::Pair<Foam::tmp<Foam::volScalarField>>
Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::mDotDeltaT() const
{
    volScalarField limitedAlpha1
    (
        min(max(mixture_.alpha1(), scalar(0)), scalar(1))
    );
 
    volScalarField limitedAlpha2
    (
        min(max(mixture_.alpha2(), scalar(0)), scalar(1))
    );
 
    const volScalarField& T = mesh_.lookupObject<volScalarField>("T");
 
    const twoPhaseMixtureEThermo& thermo =
        refCast<const twoPhaseMixtureEThermo>
        (
            mesh_.lookupObject<basicThermo>(basicThermo::dictName)
        );
 
    const dimensionedScalar& TSat = thermo.TSat();
 
    return Pair<tmp<volScalarField>>
    (
        coeffC_*mixture_.rho2()*limitedAlpha2*pos(TSat - T),
        coeffE_*mixture_.rho1()*limitedAlpha1*pos(T - TSat)
    );
}
 
 
Foam::tmp<Foam::fvScalarMatrix>
Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::TSource() const
{
 
    const volScalarField& T = mesh_.lookupObject<volScalarField>("T");
 
    tmp<fvScalarMatrix> tTSource
    (
        new fvScalarMatrix
        (
            T,
            dimEnergy/dimTime
        )
    );
 
    fvScalarMatrix& TSource = tTSource.ref();
 
    const twoPhaseMixtureEThermo& thermo =
        refCast<const twoPhaseMixtureEThermo>
        (
            mesh_.lookupObject<basicThermo>(basicThermo::dictName)
        );
 
    const dimensionedScalar& TSat = thermo.TSat();
 
    dimensionedScalar L = mixture_.Hf2() - mixture_.Hf1();
 
    volScalarField limitedAlpha1
    (
        min(max(mixture_.alpha1(), scalar(0)), scalar(1))
    );
 
    volScalarField limitedAlpha2
    (
        min(max(mixture_.alpha2(), scalar(0)), scalar(1))
    );
 
    const volScalarField Vcoeff
    (
        coeffE_*mixture_.rho1()*limitedAlpha1*L*pos(T - TSat)
    );
    const volScalarField Ccoeff
    (
        coeffC_*mixture_.rho2()*limitedAlpha2*L*pos(TSat - T)
    );
 
    TSource =
        fvm::Sp(Vcoeff, T) - Vcoeff*TSat
      + fvm::Sp(Ccoeff, T) - Ccoeff*TSat;
 
    return tTSource;
}
 
 
void Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::correct()
{
}
 
 
bool Foam::temperaturePhaseChangeTwoPhaseMixtures::constant::read()
{
    if (temperaturePhaseChangeTwoPhaseMixture::read())
    {
        subDict(type() + "Coeffs").readEntry("coeffC", coeffC_);
        subDict(type() + "Coeffs").readEntry("coeffE", coeffE_);
 
        return true;
    }
 
    return false;
}
 
 
// ************************************************************************* //