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-   -   Skin friction in fluent is wrong (http://www.cfd-online.com/Forums/fluent/86493-skin-friction-fluent-wrong.html)

syler3321 March 24, 2011 01:34

Skin friction in fluent is wrong
 
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:)

cfd_newbie March 24, 2011 02:47

Quote:

Originally Posted by syler3321 (Post 300816)
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.
http://www.cfd-online.com/Forums/mai...-airfoils.html

syler3321 March 24, 2011 09:05

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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