SchillerNaumannDrag.C

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#include "SchillerNaumannDrag.H"
#include "addToRunTimeSelectionTable.H"
#include "coupledToConstantDensityFluid.H"
#include "coupledToFluid.H"
#include "sphericalCoupled.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Lagrangian
{
    defineTypeNameAndDebug(SchillerNaumannDrag, 0);
    addToRunTimeSelectionTable
    (
        LagrangianModel,
        SchillerNaumannDrag,
        dictionary
    );
}
}
 
 
// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
Foam::tmp<Foam::LagrangianSubScalarField>
Foam::Lagrangian::SchillerNaumannDrag::calcD
(
    const LagrangianModelRef& model,
    const LagrangianSubMesh& subMesh
) const
{
    const clouds::spherical& sCloud = cloud<clouds::spherical>();
    const clouds::sphericalCoupled& scCloud = cloud<clouds::sphericalCoupled>();
 
    tmp<LagrangianSubScalarSubField> td = sCloud.d(model, subMesh);
    const LagrangianSubScalarSubField& d = td();
    const LagrangianSubScalarField& Re = scCloud.Re(model, subMesh);
 
    assertCloud
    <
        clouds::coupledToConstantDensityFluid,
        clouds::coupledToFluid
    >();
 
    tmp<LagrangianSubScalarField> tmucByRhoOrMuc =
        isCloud<clouds::coupledToConstantDensityFluid>()
      ? (
            cloud<clouds::coupledToConstantDensityFluid>().nuc(model, subMesh)
           /cloud<clouds::coupledToConstantDensityFluid>().rhoByRhoc
        )
      : tmp<LagrangianSubScalarField>
        (
            cloud<clouds::coupledToFluid>().muc(model, subMesh)
        );
 
    return CdRe(Re)*(constant::mathematical::pi/8)*d*tmucByRhoOrMuc;
}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
Foam::tmp<Foam::LagrangianSubScalarField>
Foam::Lagrangian::SchillerNaumannDrag::CdRe
(
    const LagrangianSubScalarField& Re
)
{
    return
        neg(Re - 1000)*24*(1 + 0.15*pow(Re, 0.687))
      + pos0(Re - 1000)*0.44*Re;
}
 
 
// ************************************************************************* //