[Other] skewness in checkMesh

fightingfalcon23 · February 1, 2010, 04:47

Hi,

it´s a short question:

Can somebody explain, what "skewness" mean in checkMesh? I know orthogonality and aspect ratio. But skewness......

Thanks
ff23

gwierink · February 2, 2010, 02:54

Hi Sebastian,

Skewness is a measure for grid quality; it tells how skewed (i.e. "non-straight") your cells are. There are several ways to calculate it, have a look at this presentation by Andre Bakker for some explanation.

Robat · May 14, 2010, 07:37

Hi,

Ideally the calculated flux between two cells goes through the center of the intermediate face. But in most cases your cells are not ideal (have nonOrtho and so on), so there is a distance between the linear flux and the face center which is called "skewness". See H.Jasaks PhD for detailed information.

PS: skewness in Fluent is a different thing.

Regards, Robert

February 1, 2010, 04:47	skewness in checkMesh	#1
fightingfalcon23 Member Sebastian Join Date: Mar 2009 Location: Munich, Germany Posts: 30 Rep Power: 17	Hi, it´s a short question: Can somebody explain, what "skewness" mean in checkMesh? I know orthogonality and aspect ratio. But skewness...... Thanks ff23

February 2, 2010, 02:54		#2
gwierink Senior Member Gijsbert Wierink Join Date: Mar 2009 Posts: 383 Rep Power: 18	Hi Sebastian, Skewness is a measure for grid quality; it tells how skewed (i.e. "non-straight") your cells are. There are several ways to calculate it, have a look at this presentation by Andre Bakker for some explanation. __________________ Regards, Gijs

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May 14, 2010, 07:37		#3
Robat New Member Robert Langner Join Date: Dec 2009 Location: Freiburg, Germany Posts: 27 Rep Power: 16	Hi, Ideally the calculated flux between two cells goes through the center of the intermediate face. But in most cases your cells are not ideal (have nonOrtho and so on), so there is a distance between the linear flux and the face center which is called "skewness". See H.Jasaks PhD for detailed information. PS: skewness in Fluent is a different thing. Regards, Robert