Burns.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 2014-2015 OpenFOAM Foundation
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#include "Burns.H"
#include "phasePair.H"
#include "phaseCompressibleTurbulenceModel.H"
#include "addToRunTimeSelectionTable.H"
 
#include "dragModel.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace turbulentDispersionModels
{
    defineTypeNameAndDebug(Burns, 0);
    addToRunTimeSelectionTable
    (
        turbulentDispersionModel,
        Burns,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::turbulentDispersionModels::Burns::Burns
(
    const dictionary& dict,
    const phasePair& pair
)
:
    turbulentDispersionModel(dict, pair),
    sigma_("sigma", dimless, dict),
    residualAlpha_
    (
        "residualAlpha",
        dimless,
        dict.lookupOrDefault<scalar>
        (
            "residualAlpha",
            pair_.dispersed().residualAlpha().value()
        )
    )
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
Foam::turbulentDispersionModels::Burns::~Burns()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
Foam::tmp<Foam::volScalarField>
Foam::turbulentDispersionModels::Burns::D() const
{
    const fvMesh& mesh(pair_.phase1().mesh());
    const dragModel&
        drag
        (
            mesh.lookupObject<dragModel>
            (
                IOobject::groupName(dragModel::typeName, pair_.name())
            )
        );
 
    return
        0.75
       *drag.CdRe()
       *pair_.continuous().nu()
       *pair_.continuous().turbulence().nut()
       /(
            sigma_
           *sqr(pair_.dispersed().d())
        )
       *pair_.continuous().rho()
       *(1.0 + pair_.dispersed()/max(pair_.continuous(), residualAlpha_));
}
 
 
// ************************************************************************* //