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Lottar January 26, 2009 06:09

Wall function
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!



zongtwi January 26, 2009 11:37

Re: Wall function
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.

Lottar January 26, 2009 18:13

Re: Wall function
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??


zongtwi January 27, 2009 07:36

Re: Wall function
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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