GidaspowSchillerNaumann.C

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    Copyright (C) 2011-2017 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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#include "GidaspowSchillerNaumann.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(GidaspowSchillerNaumann, 0);
 
    addToRunTimeSelectionTable
    (
        dragModel,
        GidaspowSchillerNaumann,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::dragModels::GidaspowSchillerNaumann::GidaspowSchillerNaumann
(
    const dictionary& interfaceDict,
    const phaseModel& phase1,
    const phaseModel& phase2
)
:
    dragModel(interfaceDict, phase1, phase2)
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::dragModels::GidaspowSchillerNaumann::~GidaspowSchillerNaumann()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField> Foam::dragModels::GidaspowSchillerNaumann::K
(
    const volScalarField& Ur
) const
{
    volScalarField alpha2(max(phase2_, scalar(1e-6)));
    volScalarField bp(pow(alpha2, -2.65));
 
    volScalarField Re(max(alpha2*Ur*phase1_.d()/phase2_.nu(), scalar(1.0e-3)));
    volScalarField Cds
    (
        neg(Re - 1000)*(24.0*(1.0 + 0.15*pow(Re, 0.687))/Re)
      + pos0(Re - 1000)*0.44
    );
 
    return 0.75*Cds*phase2_.rho()*Ur*bp/phase1_.d();
}
 
 
// ************************************************************************* //