97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
|
/*---------------------------------------------------------------------------*\
|
||
|
|
========= |
|
||
|
|
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
|
||
|
|
\\ / O peration |
|
||
|
|
\\ / A nd | Copyright held by original author
|
||
|
|
\\/ M anipulation |
|
||
|
|
-------------------------------------------------------------------------------
|
||
|
|
License
|
||
|
|
This file is part of OpenFOAM.
|
||
|
|
|
||
|
|
OpenFOAM is free software; you can redistribute it and/or modify it
|
||
|
|
under the terms of the GNU General Public License as published by the
|
||
|
|
Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
option) any later version.
|
||
|
|
|
||
|
|
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
|
||
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with OpenFOAM; if not, write to the Free Software Foundation,
|
||
|
|
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
|
||
|
|
Description
|
||
|
|
Calculates the total forces on a patch:
|
||
|
|
total force vector
|
||
|
|
total normal force
|
||
|
|
total force in each direction (x, y and z)
|
||
|
|
|
||
|
|
Author
|
||
|
|
philip.cardiff@ucd.ie
|
||
|
|
|
||
|
|
\*---------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#include "fvCFD.H"
|
||
|
|
|
||
|
|
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
# include "setRootCase.H"
|
||
|
|
|
||
|
|
# include "createTime.H"
|
||
|
|
|
||
|
|
# include "createMesh.H"
|
||
|
|
|
||
|
|
while(runTime.loop())
|
||
|
|
{
|
||
|
|
Info<< "Time: " << runTime.timeName() << nl << endl;
|
||
|
|
|
||
|
|
volSymmTensorField sigma
|
||
|
|
(
|
||
|
|
IOobject
|
||
|
|
(
|
||
|
|
"sigma",
|
||
|
|
runTime.timeName(),
|
||
|
|
mesh,
|
||
|
|
IOobject::MUST_READ,
|
||
|
|
IOobject::NO_WRITE
|
||
|
|
),
|
||
|
|
mesh
|
||
|
|
);
|
||
|
|
|
||
|
|
Info << nl;
|
||
|
|
|
||
|
|
vector netForce = vector::zero;
|
||
|
|
|
||
|
|
forAll(mesh.boundary(), patchID)
|
||
|
|
{
|
||
|
|
vectorField n = mesh.boundary()[patchID].nf();
|
||
|
|
const vectorField& Sf = mesh.boundary()[patchID].Sf();
|
||
|
|
const symmTensorField& sigmaPatch = sigma.boundaryField()[patchID];
|
||
|
|
|
||
|
|
vector totalForce = sum(Sf & sigmaPatch);
|
||
|
|
netForce += totalForce;
|
||
|
|
scalar totalNormalForce = sum(n & (Sf & sigmaPatch));
|
||
|
|
vector totalShearForce = sum((I -sqr(n)) & (Sf & sigmaPatch));
|
||
|
|
|
||
|
|
Info << "Patch: " << mesh.boundary()[patchID].name() << nl
|
||
|
|
<< "\tTotal Force:\t\t" << totalForce << " N\n"
|
||
|
|
<< "\tTotal Normal Force:\t" << totalNormalForce << " N\n"
|
||
|
|
<< "\tTotal Shear Force:\t" << totalShearForce << " N\n" << endl;
|
||
|
|
}
|
||
|
|
|
||
|
|
Info << nl << "Net force on model is " << netForce << " N" << endl;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
Info << nl << "End" << endl;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// ************************************************************************* //
|