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-   -   Blockmesh problem about skewness (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/61841-blockmesh-problem-about-skewness.html)

aderliner December 1, 2006 22:04

Hi everyone~~ I wrote a cyl
 
Hi everyone~~

I wrote a cylinder case, and used checkmesh to check it ,it is ok~! But, after I refined it, and the terminal show as below:

--> FOAM Warning :
From function primitiveMesh::checkFaceSkewness(const bool report, labelHashSet* setPtr) const
in file meshes/primitiveMesh/primitiveMeshCheck.C at line 838
Large face skewness detected. Max skewness = 261.67262 percent.
This may impair the quality of the result.
400 highly skew faces detected.
Writing 400 skew faces to set skewFaces

Minumum edge length = 1.0466153e-05. Maximum edge length = 4.1864613e-05.

All angles in faces are convex or less than 10 degrees concave.

Face flatness (1 = flat, 0 = butterfly) : average = 1 min = 1
All faces are flat in that the ratio between projected and actual area is > 0.8

Geometry check done.

Number of cells by type:
hexahedra: 123750
prisms: 0
wedges: 0
pyramids: 0
tet wedges: 0
tetrahedra: 0
polyhedra: 0
Number of regions: 1 (OK).
Failed 1 mesh checks.


Then I try to calculate this case, but, the deltaT become to 0 soon.

How can I refine the mesh ?

Best regards~~!

Bobby
12.2


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