107 lines
3 KiB
C
107 lines
3 KiB
C
/*---------------------------------------------------------------------------*\
|
|
========= |
|
|
\\ / F ield | foam-extend: Open Source CFD
|
|
\\ / O peration |
|
|
\\ / A nd | For copyright notice see file Copyright
|
|
\\/ M anipulation |
|
|
-------------------------------------------------------------------------------
|
|
License
|
|
This file is part of foam-extend.
|
|
|
|
foam-extend 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.
|
|
|
|
foam-extend 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
\*---------------------------------------------------------------------------*/
|
|
|
|
#include "GidaspowErgunWenYu.H"
|
|
#include "addToRunTimeSelectionTable.H"
|
|
|
|
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
|
|
|
|
namespace Foam
|
|
{
|
|
defineTypeNameAndDebug(GidaspowErgunWenYu, 0);
|
|
|
|
addToRunTimeSelectionTable
|
|
(
|
|
dragModel,
|
|
GidaspowErgunWenYu,
|
|
dictionary
|
|
);
|
|
}
|
|
|
|
|
|
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
|
|
|
|
Foam::GidaspowErgunWenYu::GidaspowErgunWenYu
|
|
(
|
|
const dictionary& interfaceDict,
|
|
const volScalarField& alpha,
|
|
const phaseModel& phasea,
|
|
const phaseModel& phaseb
|
|
)
|
|
:
|
|
dragModel(interfaceDict, alpha, phasea, phaseb)
|
|
{}
|
|
|
|
|
|
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
|
|
|
|
Foam::GidaspowErgunWenYu::~GidaspowErgunWenYu()
|
|
{}
|
|
|
|
|
|
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
|
|
|
|
Foam::tmp<Foam::volScalarField> Foam::GidaspowErgunWenYu::K
|
|
(
|
|
const volScalarField& Ur
|
|
) const
|
|
{
|
|
volScalarField beta = max(scalar(1) - alpha_, scalar(1.0e-6));
|
|
|
|
volScalarField bp = pow(beta, -2.65);
|
|
volScalarField Re = max(Ur*phasea_.d()/phaseb_.nu(), scalar(1.0e-3));
|
|
|
|
volScalarField Cds = 24.0*(1.0 + 0.15*pow(Re, 0.687))/Re;
|
|
|
|
forAll(Re, celli)
|
|
{
|
|
if(Re[celli] > 1000.0)
|
|
{
|
|
Cds[celli] = 0.44;
|
|
}
|
|
}
|
|
|
|
// Wen and Yu (1966)
|
|
tmp<volScalarField> tKWenYu = 0.75*Cds*phaseb_.rho()*Ur*bp/phasea_.d();
|
|
volScalarField& KWenYu = tKWenYu();
|
|
|
|
// Ergun
|
|
forAll (beta, cellj)
|
|
{
|
|
if (beta[cellj] <= 0.8)
|
|
{
|
|
KWenYu[cellj] =
|
|
150.0*alpha_[cellj]*phaseb_.nu().value()*phaseb_.rho().value()
|
|
/sqr(beta[cellj]*phasea_.d().value())
|
|
+ 1.75*phaseb_.rho().value()*Ur[cellj]
|
|
/(beta[cellj]*phasea_.d().value());
|
|
}
|
|
}
|
|
|
|
return tKWenYu;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|