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Old   April 5, 2005, 07:21
Default Skewness
  #1
Taskin
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hi, I have a 3D model that have high skewness values. However whatever I do for lowering skewness values didn't work. The worst element has a skewness of 0.82. What should the limits of skewness be for analyzing a turbulent flow of air around a body? is 0.82 anyway ok? Thanks Regards Taskin
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Old   April 5, 2005, 07:29
Default Re: Skewness
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dirk
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I have read that maximum skewness value should be around 0.5.
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Old   April 5, 2005, 07:42
Default Re: Skewness
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Taskin
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then I should decrease it in some way thanks Regards Taskin
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Old   April 5, 2005, 08:32
Default Re: Skewness
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handou
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what? the max skewness should be 0.5? in my mesh ,it often exceeds 0.9. because i use dynamic mesh, sometimes over 0.95, and there will be a warning. so, i should remash it?
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Old   April 5, 2005, 09:25
Default Re: Skewness
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Luca
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Yes, handou is right. The limit should be anyway 0.9 not to have excessive skewness. Luca
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Old   April 6, 2005, 15:21
Default Re: Skewness
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Riaan
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From my experience, try to stay under 0.75.

Up to 0.85 is acceptable, but not good. Above 0.98 - and Fluent Grid check will fail.

Also when you use such skew cells, it makes sense to go to 2nd order methods for density, momentum etc.
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