OpenFOAM-1.5-extend checkMesh problem

josp · June 23, 2009, 06:50

In openfoam extend:

cd $FOAM_TUTORIALS/icoFoam/cavity
blockMesh
checkMesh
...
Mesh OK.

transformPoints -scale "(0.001 0.001 0.001)"
checkMesh
...
***Max skewness = 116.905, 1542 highly skew faces detected which may impair the quality of the results Threshold = 4
<<Writing 1542 skew faces to set skewFaces
Failed 1 mesh checks.

The same procedure works fine under 1.5.x with no errors and the mesh looks ok (which it doesn't in -extend) I did recompile everything but the problem persists. Is there some tolerance settings that I have to change? -scale "(0.01 0.01 0.01)" works fine?

mbeaudoin · June 23, 2009, 18:03

Hi,

I did the exact same sequence of commands you did with my local installation of OpenFOAM-1.5-dev (revision 1294). No tolerances tweaking.

Got no error messages, and the mesh I got after calling transformPoints looks fine too.

My max skewness went from 1e-08 (before transformPoints) to 2 (after transformPoints), which seems to be OK for checkMesh.

" Max skewness = 2 OK. "

Martin

Quote:

Originally Posted by josp

In openfoam extend:

cd $FOAM_TUTORIALS/icoFoam/cavity
blockMesh
checkMesh
...
Mesh OK.

transformPoints -scale "(0.001 0.001 0.001)"
checkMesh
...
***Max skewness = 116.905, 1542 highly skew faces detected which may impair the quality of the results Threshold = 4
<<Writing 1542 skew faces to set skewFaces
Failed 1 mesh checks.

The same procedure works fine under 1.5.x with no errors and the mesh looks ok (which it doesn't in -extend) I did recompile everything but the problem persists. Is there some tolerance settings that I have to change? -scale "(0.01 0.01 0.01)" works fine?

josp · June 24, 2009, 12:41

Hi Martin,

I just tried with a fresh opensuse (x64) install + latest version from svn and now I get the same output as you. Problem was on my side but it's unclear what caused it.

Thank you for your attention!

Regards

Johan

Quote:

Originally Posted by mbeaudoin

Hi,

I did the exact same sequence of commands you did with my local installation of OpenFOAM-1.5-dev (revision 1294). No tolerances tweaking.

Got no error messages, and the mesh I got after calling transformPoints looks fine too.

My max skewness went from 1e-08 (before transformPoints) to 2 (after transformPoints), which seems to be OK for checkMesh.

" Max skewness = 2 OK. "

Martin

June 23, 2009, 06:50	OpenFOAM-1.5-extend checkMesh problem	#1
josp Member Johan Spång Join Date: Mar 2009 Location: Stockholm, Sweden Posts: 35 Rep Power: 17	In openfoam extend: cd $FOAM_TUTORIALS/icoFoam/cavity blockMesh checkMesh ... Mesh OK. transformPoints -scale "(0.001 0.001 0.001)" checkMesh ... ***Max skewness = 116.905, 1542 highly skew faces detected which may impair the quality of the results Threshold = 4 <<Writing 1542 skew faces to set skewFaces Failed 1 mesh checks. The same procedure works fine under 1.5.x with no errors and the mesh looks ok (which it doesn't in -extend) I did recompile everything but the problem persists. Is there some tolerance settings that I have to change? -scale "(0.01 0.01 0.01)" works fine?

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