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SyamlalOBrien.C
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SyamlalOBrien.C
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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "SyamlalOBrien.H"
#include "addToRunTimeSelectionTable.H"
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
namespace Foam
{
defineTypeNameAndDebug(SyamlalOBrien, 0);
addToRunTimeSelectionTable
(
dragModel,
SyamlalOBrien,
dictionary
);
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::SyamlalOBrien::SyamlalOBrien
(
const dictionary& interfaceDict,
const phaseModel& phasea,
const phaseModel& phaseb
)
:
dragModel(interfaceDict, phasea, phaseb)
{}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::SyamlalOBrien::~SyamlalOBrien()
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
Foam::tmp<Foam::volScalarField> Foam::SyamlalOBrien::K
(
const volScalarField& Ur
) const
{
volScalarField beta(max(scalar(1) - alpha_, scalar(1.0e-6)));
volScalarField A(pow(beta, 4.14));
volScalarField B
(
neg(beta - 0.85)*(0.8*pow(beta, 1.28))
+ pos(beta - 0.85)*(pow(beta, 2.65))
);
volScalarField Re(max(Ur*phasea_.d()*phasea_.sF()/
phaseb_.nu(), scalar(1.0e-3)));
volScalarField Vr
(
0.5*
(
A - 0.06*Re + sqrt(sqr(0.06*Re) + 0.12*Re*(2.0*B - A) + sqr(A))
)
);
volScalarField Cds(sqr(0.63 + 4.8*sqrt(Vr/Re)));
return 0.75*Cds*phaseb_.rho()*Ur/(phasea_.d()*phasea_.sF()*sqr(Vr));
}
// ************************************************************************* //