segregated.C

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-------------------------------------------------------------------------------
    Copyright (C) 2014-2018 OpenFOAM Foundation
-------------------------------------------------------------------------------
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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    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 "segregated.H"
#include "phasePair.H"
#include "fvcGrad.H"
#include "surfaceInterpolate.H"
#include "zeroGradientFvPatchFields.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(segregated, 0);
    addToRunTimeSelectionTable(dragModel, segregated, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::segregated::segregated
(
    const dictionary& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject),
    m_("m", dimless, dict),
    n_("n", dimless, dict)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::segregated::~segregated()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::segregated::CdRe() const
{
    FatalErrorInFunction
        << "Not implemented."
        << "Drag coefficient not defined for the segregated model."
        << exit(FatalError);
 
    return pair_.phase1();
}
 
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::segregated::K() const
{
    const fvMesh& mesh(pair_.phase1().mesh());
 
    const volScalarField& alpha1(pair_.phase1());
    const volScalarField& alpha2(pair_.phase2());
 
    const volScalarField& rho1(pair_.phase1().rho());
    const volScalarField& rho2(pair_.phase2().rho());
 
    tmp<volScalarField> tnu1(pair_.phase1().nu());
    tmp<volScalarField> tnu2(pair_.phase2().nu());
 
    const volScalarField& nu1(tnu1());
    const volScalarField& nu2(tnu2());
 
    volScalarField L
    (
        IOobject
        (
            "L",
            mesh.time().timeName(),
            mesh
        ),
        mesh,
        dimensionedScalar(dimLength),
        zeroGradientFvPatchField<scalar>::typeName
    );
    L.primitiveFieldRef() = cbrt(mesh.V());
    L.correctBoundaryConditions();
 
    const volScalarField I
    (
        alpha1
       /max
        (
            alpha1 + alpha2,
            pair_.phase1().residualAlpha() + pair_.phase2().residualAlpha()
        )
    );
    const volScalarField magGradI
    (
        max
        (
            mag(fvc::grad(I)),
            (pair_.phase1().residualAlpha() + pair_.phase2().residualAlpha())/L
        )
    );
 
    const volScalarField muI
    (
        rho1*nu1*rho2*nu2
       /(rho1*nu1 + rho2*nu2)
    );
 
    const volScalarField limitedAlpha1
    (
        max(alpha1, pair_.phase1().residualAlpha())
    );
 
    const volScalarField limitedAlpha2
    (
        max(alpha2, pair_.phase2().residualAlpha())
    );
 
    const volScalarField muAlphaI
    (
        alpha1*rho1*nu1*alpha2*rho2*nu2
       /(limitedAlpha1*rho1*nu1 + limitedAlpha2*rho2*nu2)
    );
 
    const volScalarField ReI
    (
        pair_.rho()
       *pair_.magUr()
       /(magGradI*limitedAlpha1*limitedAlpha2*muI)
    );
 
    const volScalarField lambda(m_*ReI + n_*muAlphaI/muI);
 
    return lambda*sqr(magGradI)*muI;
}
 
 
Foam::tmp<Foam::surfaceScalarField> Foam::dragModels::segregated::Kf() const
{
    return fvc::interpolate(K());
}
 
 
// ************************************************************************* //