1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2010 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/>.
28 Generates an analytical solution for potential flow around a cylinder.
29 Can be compared with the solution from the potentialFlow/cylinder example.
31 \*---------------------------------------------------------------------------*/
36 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
38 int main(int argc, char *argv[])
41 # include "setRootCase.H"
43 # include "createTime.H"
44 # include "createMesh.H"
45 # include "createFields.H"
47 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
49 Info << "\nEvaluating analytical solution" << endl;
51 volVectorField centres = UA.mesh().C();
52 volScalarField magCentres = mag(centres);
53 volScalarField theta = acos((centres & vector(1,0,0))/magCentres);
55 volVectorField cs2theta =
56 cos(2*theta)*vector(1,0,0)
57 + sin(2*theta)*vector(0,1,0);
59 UA = uInfX*(dimensionedVector(vector(1,0,0))
60 - pow((radius/magCentres),2)*cs2theta);
62 // Force writing of UA (since time has not changed)
70 // ************************************************************************* //