FreeFOAM The Cross-Platform CFD Toolkit
CourantNo.H
Go to the documentation of this file.
1 /*---------------------------------------------------------------------------*\
2  ========= |
3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
4  \\ / O peration |
5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
6  \\/ M anipulation |
7 -------------------------------------------------------------------------------
8 License
9  This file is part of OpenFOAM.
10 
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.
15 
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
19  for more details.
20 
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/>.
23 
24 Global
25  CourantNo
26 
27 Description
28  Calculates and outputs the maximum Courant Number.
29 
30 \*---------------------------------------------------------------------------*/
31 
32 
33 scalar CoNum = 0.0;
34 scalar meanCoNum = 0.0;
35 scalar waveCoNum = 0.0;
36 
37 if (mesh.nInternalFaces())
38 {
39  surfaceScalarField SfUfbyDelta =
40  mesh.surfaceInterpolation::deltaCoeffs()
42 
43  CoNum = max(SfUfbyDelta/mesh.magSf())
44  .value()*runTime.deltaT().value();
45 
46  meanCoNum = (sum(SfUfbyDelta)/sum(mesh.magSf()))
47  .value()*runTime.deltaT().value();
48 
49  // Gravity wave Courant number
50  waveCoNum =
51  0.5*max
52  (
53  mesh.surfaceInterpolation::deltaCoeffs()
55  ).value()*sqrt(magg).value()*runTime.deltaT().value();
56 }
57 
58 Info<< "Courant number mean: " << meanCoNum
59  << " max: " << CoNum << endl;
60 
61 Info<< "Gravity wave Courant number max: " << waveCoNum
62  << endl;
63 
64 
65 // ************************ vim: set sw=4 sts=4 et: ************************ //