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Skin friction in fluent is wrong

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Old   March 24, 2011, 01:34
Default Skin friction in fluent is wrong
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ralph
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hi,
I am running a simulation for low reynolds number aerofoil flow. I used the k omega sst model with great effect. only problem is the coefficient of skin friction plot does not make sense. I should have negative values of skin friction but it seems that the lowest value of coefficient of skin friction is 0. Can any CFD or Fluent expert tell me where i might possibly make a mistake?
Thanks .. appreciate all the help i can get
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Old   March 24, 2011, 02:47
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Raashid Baig
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Quote:
Originally Posted by syler3321 View Post
hi,
I am running a simulation for low reynolds number aerofoil flow. I used the k omega sst model with great effect. only problem is the coefficient of skin friction plot does not make sense. I should have negative values of skin friction but it seems that the lowest value of coefficient of skin friction is 0. Can any CFD or Fluent expert tell me where i might possibly make a mistake?
Thanks .. appreciate all the help i can get
Please see the discussion on a similar topic of low speed airfoil it might be of help.
Two-equation turbulent models: low re airfoils
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Old   March 24, 2011, 09:05
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hi rashid,
thanks for pointing to that discussion . unfortunately it didnt help me. i cant seem to get negative skin friction on my plots despite having reversed flow appear when i looked at the velocity vectors in the immediate vicinity of the aerofoil surface
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