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Old   January 26, 2009, 06:09
Default Wall function
  #1
Lottar
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Hi guys!

I have a question related to wall functions...i was reading the FLUENT guide and i found u can apply wall functions to solve the boundary layer when ur grid is coarse and cannot catch all of it...

in my case i have to work with a size cell of y+=100!!! so, which way do u suggest me to catch better the boundary layer??

thanks a lot! please i need help so any advice will be welcome!

cheers

Lottar
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Old   January 26, 2009, 11:37
Default Re: Wall function
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zongtwi
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If your Y+ is around 100, then you should be using the standard wall function or the non equilibrium wall function, both with the k-e model. I'd recommend the realizable k-e model.

hope that helps.
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Old   January 26, 2009, 18:13
Default Re: Wall function
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Lottar
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Hi zongtwi!

thanks for answering so quickly, yes i was thinking the same, to apply standard wall function, but i wasnt sure of being enough to catch the BL working with such a high y+... what do u think??

cheers!
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Old   January 27, 2009, 07:36
Default Re: Wall function
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zongtwi
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That's the whole point of using wall functions! Just follow the recommendations in the User's Guide, and you'll be fine.

Hope that helps.
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