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March 10, 2015, 22:11 |
Wall function
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#1 |
Senior Member
Join Date: Aug 2014
Posts: 160
Rep Power: 11 |
Does anyone know the equivalence of scalable wall function of CFX in STARCCM+ for k-epsilon turbulence model ?
(In CFX, The scalable approach assumes that if on the first node y+<11 then it just makes it 11.) Thank you for your help |
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March 11, 2015, 10:03 |
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#2 |
Senior Member
Matt
Join Date: Aug 2014
Posts: 947
Rep Power: 17 |
I don't think there is one. From what I can tell, the scalable wall function in CFX is only intended to keep y+ manageble when doing grid refinement. Star-ccm+ has an all y+ wall treatment that blends near and far wall and is more flexible in terms of cell size/y+ requirements. For a typical k-e run with all wall y+ you should keep your y+ betwen 1 and 5 or 30 and 60 for best results and try to avoid y+ > 120. Those y+ values come straight from technical support engineers at CD-adapco.
I had never actually heard of the scalable wall function before, so I apologize if my quick research on the subject is incorrect. Last edited by fluid23; March 11, 2015 at 12:25. |
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