1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 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 the
13 Free Software Foundation; either version 2 of the License, or (at your
14 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, write to the Free Software Foundation,
23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 \*---------------------------------------------------------------------------*/
28 #include "addToRunTimeSelectionTable.H"
30 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
34 defineTypeNameAndDebug(Ergun, 0);
36 addToRunTimeSelectionTable
45 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
49 const dictionary& interfaceDict,
50 const volScalarField& alpha,
51 const phaseModel& phasea,
52 const phaseModel& phaseb
55 dragModel(interfaceDict, alpha, phasea, phaseb)
59 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
65 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
67 Foam::tmp<Foam::volScalarField> Foam::Ergun::K
69 const volScalarField& Ur
72 volScalarField beta = max(scalar(1) - alpha_, scalar(1.0e-6));
75 150.0*alpha_*phaseb_.nu()*phaseb_.rho()
76 /sqr(beta*phasea_.d())
77 + 1.75*phaseb_.rho()*Ur/(beta*phasea_.d());
81 // ************************************************************************* //