1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | foam-extend: Open Source CFD
4 \\ / O peration | Version: 3.2
5 \\ / A nd | Web: http://www.foam-extend.org
6 \\/ M anipulation | For copyright notice see file Copyright
7 -------------------------------------------------------------------------------
9 This file is part of foam-extend.
11 foam-extend 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 3 of the License, or (at your
14 option) any later version.
16 foam-extend is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
25 Calculates the total forces on a patch:
28 total force in each direction (x, y and z)
33 \*---------------------------------------------------------------------------*/
37 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
39 int main(int argc, char *argv[])
41 # include "setRootCase.H"
43 # include "createTime.H"
45 # include "createMesh.H"
49 Info<< "Time: " << runTime.timeName() << nl << endl;
51 volSymmTensorField sigma
66 vector netForce = vector::zero;
68 forAll(mesh.boundary(), patchID)
70 vectorField n = mesh.boundary()[patchID].nf();
71 const vectorField& Sf = mesh.boundary()[patchID].Sf();
72 const symmTensorField& sigmaPatch = sigma.boundaryField()[patchID];
74 vector totalForce = sum(Sf & sigmaPatch);
75 netForce += totalForce;
76 scalar totalNormalForce = sum(n & (Sf & sigmaPatch));
77 vector totalShearForce = sum((I -sqr(n)) & (Sf & sigmaPatch));
79 Info << "Patch: " << mesh.boundary()[patchID].name() << nl
80 << "\tTotal Force:\t\t" << totalForce << " N\n"
81 << "\tTotal Normal Force:\t" << totalNormalForce << " N\n"
82 << "\tTotal Shear Force:\t" << totalShearForce << " N\n" << endl;
85 Info << nl << "Net force on model is " << netForce << " N" << endl;
89 Info << nl << "End" << endl;
95 // ************************************************************************* //