1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 2004-2010 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
11 OpenFOAM is free software: you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation, either version 3 of the License, or
14 (at your option) any later version.
16 OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
24 \*---------------------------------------------------------------------------*/
27 #include "addToRunTimeSelectionTable.H"
29 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
33 defineTypeNameAndDebug(Ergun, 0);
35 addToRunTimeSelectionTable
44 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
48 const dictionary& interfaceDict,
49 const volScalarField& alpha,
50 const phaseModel& phasea,
51 const phaseModel& phaseb
54 dragModel(interfaceDict, alpha, phasea, phaseb)
58 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
64 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
66 Foam::tmp<Foam::volScalarField> Foam::Ergun::K
68 const volScalarField& Ur
71 volScalarField beta(max(scalar(1) - alpha_, scalar(1.0e-6)));
74 150.0*alpha_*phaseb_.nu()*phaseb_.rho()
75 /sqr(beta*phasea_.d())
76 + 1.75*phaseb_.rho()*Ur/(beta*phasea_.d());
80 // ************************************************************************* //