VoFSolidificationMeltingSource.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    Copyright (C) 2017 OpenFOAM Foundation
    Copyright (C) 2020-2021 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
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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\*---------------------------------------------------------------------------*/
 
#include "VoFSolidificationMeltingSource.H"
#include "twoPhaseMixtureThermo.H"
#include "zeroGradientFvPatchFields.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
namespace Foam
{
    namespace fv
    {
        defineTypeNameAndDebug(VoFSolidificationMeltingSource, 0);
 
        addToRunTimeSelectionTable
        (
            option,
            VoFSolidificationMeltingSource,
            dictionary
        );
    }
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
void Foam::fv::VoFSolidificationMeltingSource::update()
{
    if (curTimeIndex_ == mesh_.time().timeIndex())
    {
        return;
    }
 
    if (debug)
    {
        Info<< type() << ": " << name_
            << " - updating solid phase fraction" << endl;
    }
 
    alphaSolid_.oldTime();
 
    const twoPhaseMixtureThermo& thermo
    (
        mesh_.lookupObject<twoPhaseMixtureThermo>
        (
            twoPhaseMixtureThermo::dictName
        )
    );
 
    const volScalarField& TVoF = thermo.thermo1().T();
    const volScalarField CpVoF(thermo.thermo1().Cp());
    const volScalarField& alphaVoF = thermo.alpha1();
 
    forAll(cells_, i)
    {
        const label celli = cells_[i];
 
        alphaSolid_[celli] = min
        (
            relax_*alphaVoF[celli]*alphaSolidT_->value(TVoF[celli])
          + (1 - relax_)*alphaSolid_[celli],
            alphaVoF[celli]
        );
    }
 
    alphaSolid_.correctBoundaryConditions();
 
    curTimeIndex_ = mesh_.time().timeIndex();
}
 
 
Foam::word Foam::fv::VoFSolidificationMeltingSource::alphaSolidName() const
{
    const twoPhaseMixtureThermo& thermo
    (
        mesh_.lookupObject<twoPhaseMixtureThermo>
        (
            twoPhaseMixtureThermo::dictName
        )
    );
 
    const volScalarField& alphaVoF = thermo.alpha1();
 
    return IOobject::groupName(alphaVoF.name(), "solid");
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::VoFSolidificationMeltingSource::VoFSolidificationMeltingSource
(
    const word& sourceName,
    const word& modelType,
    const dictionary& dict,
    const fvMesh& mesh
)
:
    fv::cellSetOption(sourceName, modelType, dict, mesh),
    alphaSolidT_(Function1<scalar>::New("alphaSolidT", coeffs_, &mesh)),
    L_("L", dimEnergy/dimMass, coeffs_),
    relax_(coeffs_.getOrDefault("relax", 0.9)),
    Cu_(coeffs_.getOrDefault<scalar>("Cu", 100000)),
    q_(coeffs_.getOrDefault<scalar>("q", 0.001)),
    alphaSolid_
    (
        IOobject
        (
            alphaSolidName(),
            mesh.time().timeName(),
            mesh,
            IOobject::READ_IF_PRESENT,
            IOobject::AUTO_WRITE
        ),
        mesh,
        dimensionedScalar(dimless, Zero),
        fvPatchFieldBase::zeroGradientType()
    ),
    curTimeIndex_(-1)
{
    fieldNames_.resize(2);
    fieldNames_[0] = "U";
    fieldNames_[1] = "T";
 
    fv::option::resetApplied();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
void Foam::fv::VoFSolidificationMeltingSource::addSup
(
    fvMatrix<scalar>& eqn,
    const label fieldi
)
{
    apply(geometricOneField(), eqn);
}
 
 
void Foam::fv::VoFSolidificationMeltingSource::addSup
(
    const volScalarField& rho,
    fvMatrix<scalar>& eqn,
    const label fieldi
)
{
    apply(rho, eqn);
}
 
 
void Foam::fv::VoFSolidificationMeltingSource::addSup
(
    fvMatrix<vector>& eqn,
    const label fieldi
)
{
    if (debug)
    {
        Info<< type() << ": applying source to " << eqn.psi().name() << endl;
    }
 
    update();
 
    scalarField& Sp = eqn.diag();
    const scalarField& V = mesh_.V();
 
    forAll(cells_, i)
    {
        const label celli = cells_[i];
        const scalar Vc = V[celli];
        const scalar alphaFluid = 1 - alphaSolid_[celli];
 
        const scalar S = Cu_*sqr(1 - alphaFluid)/(pow3(alphaFluid) + q_);
 
        Sp[celli] -= Vc*S;
    }
}
 
 
void Foam::fv::VoFSolidificationMeltingSource::addSup
(
    const volScalarField& rho,
    fvMatrix<vector>& eqn,
    const label fieldi
)
{
    // Momentum source uses a Boussinesq approximation - redirect
    addSup(eqn, fieldi);
}
 
 
// ************************************************************************* //