GidaspowSchillerNaumann.C

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#include "GidaspowSchillerNaumann.H"
#include "phasePair.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& dict,
    const phasePair& pair,
    const bool registerObject
)
:
    dragModel(dict, pair, registerObject),
    residualRe_("residualRe", dimless, dict)
{}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::dragModels::GidaspowSchillerNaumann::~GidaspowSchillerNaumann()
{}


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

Foam::tmp<Foam::volScalarField>
Foam::dragModels::GidaspowSchillerNaumann::CdRe() const
{
    volScalarField alpha2
    (
        max(scalar(1) - pair_.dispersed(), pair_.continuous().residualAlpha())
    );

    volScalarField Re(alpha2*pair_.Re());

    volScalarField CdsRe
    (
        neg(Re - 1000)*24*(1.0 + 0.15*pow(Re, 0.687))/alpha2
      + pos0(Re - 1000)*0.44*max(Re, residualRe_)
    );

    return
        CdsRe
       *pow(alpha2, -2.65)
       *max(pair_.continuous(), pair_.continuous().residualAlpha());
}


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