96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "SyamlalOBrien.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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defineTypeNameAndDebug(SyamlalOBrien, 0);
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addToRunTimeSelectionTable
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(
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dragModel,
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SyamlalOBrien,
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dictionary
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);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::SyamlalOBrien::SyamlalOBrien
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(
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const dictionary& interfaceDict,
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const volScalarField& alpha,
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const phaseModel& phasea,
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const phaseModel& phaseb
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)
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:
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dragModel(interfaceDict, alpha, phasea, phaseb)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::SyamlalOBrien::~SyamlalOBrien()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::tmp<Foam::volScalarField> Foam::SyamlalOBrien::K
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(
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const volScalarField& Ur
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) const
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{
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volScalarField beta = max(scalar(1) - alpha_, scalar(1.0e-6));
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volScalarField A = pow(beta, 4.14);
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volScalarField B = 0.8*pow(beta, 1.28);
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forAll (beta, celli)
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{
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if (beta[celli] > 0.85)
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{
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B[celli] = pow(beta[celli], 2.65);
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}
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}
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volScalarField Re = max(Ur*phasea_.d()/phaseb_.nu(), scalar(1.0e-3));
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volScalarField Vr = 0.5*
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(
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A - 0.06*Re + sqrt(sqr(0.06*Re) + 0.12*Re*(2.0*B - A) + sqr(A))
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);
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volScalarField Cds = sqr(0.63 + 4.8*sqrt(Vr/Re));
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return 0.75*Cds*phaseb_.rho()*Ur/(phasea_.d()*sqr(Vr));
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}
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// ************************************************************************* //
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