Merkle.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2019 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
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#include "Merkle.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace phaseChangeTwoPhaseMixtures
{
    defineTypeNameAndDebug(Merkle, 0);
    addToRunTimeSelectionTable(phaseChangeTwoPhaseMixture, Merkle, components);
}
}

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::phaseChangeTwoPhaseMixtures::Merkle::Merkle
(
    const volVectorField& U,
    const surfaceScalarField& phi
)
:
    phaseChangeTwoPhaseMixture(typeName, U, phi),

    UInf_("UInf", dimVelocity, phaseChangeTwoPhaseMixtureCoeffs_),
    tInf_("tInf", dimTime, phaseChangeTwoPhaseMixtureCoeffs_),
    Cc_("Cc", dimless, phaseChangeTwoPhaseMixtureCoeffs_),
    Cv_("Cv", dimless, phaseChangeTwoPhaseMixtureCoeffs_),

    p0_("0", pSat().dimensions(), 0.0),

    mcCoeff_(Cc_/(0.5*sqr(UInf_)*tInf_)),
    mvCoeff_(Cv_*rho1()/(0.5*sqr(UInf_)*tInf_*rho2()))
{
    correct();
}


// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

Foam::Pair<Foam::tmp<Foam::volScalarField>>
Foam::phaseChangeTwoPhaseMixtures::Merkle::mDotAlphal() const
{
    const volScalarField& p = alpha1().db().lookupObject<volScalarField>("p");

    return Pair<tmp<volScalarField>>
    (
        mcCoeff_*max(p - pSat(), p0_),
        mvCoeff_*min(p - pSat(), p0_)
    );
}


Foam::Pair<Foam::tmp<Foam::volScalarField>>
Foam::phaseChangeTwoPhaseMixtures::Merkle::mDotP() const
{
    const volScalarField& p = alpha1().db().lookupObject<volScalarField>("p");
    volScalarField limitedAlpha1(min(max(alpha1(), scalar(0)), scalar(1)));

    return Pair<tmp<volScalarField>>
    (
        mcCoeff_*(1.0 - limitedAlpha1)*pos0(p - pSat()),
        (-mvCoeff_)*limitedAlpha1*neg(p - pSat())
    );
}


void Foam::phaseChangeTwoPhaseMixtures::Merkle::correct()
{
    phaseChangeTwoPhaseMixture::correct();
}


bool Foam::phaseChangeTwoPhaseMixtures::Merkle::read()
{
    if (phaseChangeTwoPhaseMixture::read())
    {
        phaseChangeTwoPhaseMixtureCoeffs_ = optionalSubDict(type() + "Coeffs");

        phaseChangeTwoPhaseMixtureCoeffs_.lookup("UInf") >> UInf_;
        phaseChangeTwoPhaseMixtureCoeffs_.lookup("tInf") >> tInf_;
        phaseChangeTwoPhaseMixtureCoeffs_.lookup("Cc") >> Cc_;
        phaseChangeTwoPhaseMixtureCoeffs_.lookup("Cv") >> Cv_;

        mcCoeff_ = Cc_/(0.5*sqr(UInf_)*tInf_);
        mvCoeff_ = Cv_*rho1()/(0.5*sqr(UInf_)*tInf_*rho2());

        return true;
    }
    else
    {
        return false;
    }
}


// ************************************************************************* //