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-   -   [ANSYS Meshing] fluent cutcell grid and skeweness criterion (http://www.cfd-online.com/Forums/ansys-meshing/96286-fluent-cutcell-grid-skeweness-criterion.html)

laxwendrofzx9r January 18, 2012 05:46

fluent cutcell grid and skeweness criterion
 
Dear,
I have a strange problem with cutcell mesh in Fluent. My question is, does the cutcell mesh should be only evaluate base on the orthogonal quality and no skewness? In Fluent the cutcell mesh appears with vh skewness around 0.98 in some regions but the orthogonal quality is acceptable.


Regards,

TOM

everdimension May 28, 2012 15:17

I'd like to hear the answer, too.

It seems as if no matter how much better the cutsell mesh is compared to the ordinary tetrahedron mesh, the skewness criterion is worse and almost 1.

gfoam June 1, 2012 08:41

Quote:

Originally Posted by everdimension (Post 363462)
I'd like to hear the answer, too.

It seems as if no matter how much better the cutsell mesh is compared to the ordinary tetrahedron mesh, the skewness criterion is worse and almost 1.

this hapened to me too, but my support told me that don't care of the skewness, but the orthogonal quality should be over 0.2

everdimension June 1, 2012 13:58

Yep, found this in the Meshing User's Guide:

"Orthogonal quality, which is the recommended quality criterion for CFD simulations, can be used for all types of meshes including CutCell and polyhedral. Note that the skewness quality criterion is not recommended for CutCell meshes."

gfoam June 3, 2012 11:45

OK, thanks, I'll keep it in mind


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