Automatic Wall Function

December 8, 2004, 23:55

Under the section of "Automatic Near-Wall Treatment for k-omega Based Models" on page 91 of CFX 5.7 user manual, a1 is used in the equation for ustar. What is that constant? I can't find it anywhere in the user manual. Is it the same as alpha1 = 5/9?

Thanks for the help.

Craig

Lukas90 · March 12, 2014, 09:29

I know this is a very old thread but I have the same problem and want to know what a1 in the equation of u_star should be?
Is it the same constant as used in the SST-Model? a1=0,31?

Thank you for your help.

December 8, 2004, 23:55	Automatic Wall Function	#1
Craig Johansen Guest Posts: n/a	Under the section of "Automatic Near-Wall Treatment for k-omega Based Models" on page 91 of CFX 5.7 user manual, a1 is used in the equation for ustar. What is that constant? I can't find it anywhere in the user manual. Is it the same as alpha1 = 5/9? Thanks for the help. Craig

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March 12, 2014, 09:29		#2
Lukas90 New Member Join Date: Jan 2014 Posts: 13 Rep Power: 12	I know this is a very old thread but I have the same problem and want to know what a1 in the equation of u_star should be? Is it the same constant as used in the SST-Model? a1=0,31? Thank you for your help.