log-law change - Fluent

C.C · November 2, 2012, 12:23

Hi all,

I want change the log-law function in Fluent...
I changed it, considering the strategy present in the manuals of fluent, by creating an UDF where I give the new expressions for UPLUS_TRB, DUPLUS_TRB and D2UPLUS_TRB. But, someone told me that I need also change the viscosity. But I don't know how I do that. Please, someone can help me? Where I can find information about this? If I just change the Uplus expression as a function of Yplus, is that correct.
Another thing... how I can see/get the values of Uplus to represent it as a function of Yplus? To check what Fluent is assuming.
Regards

C.C · November 5, 2012, 10:25

Anyone can help me?

November 2, 2012, 12:23	log-law change - Fluent	#1
C.C Member CC Join Date: Jun 2011 Posts: 73 Rep Power: 15	Hi all, I want change the log-law function in Fluent... I changed it, considering the strategy present in the manuals of fluent, by creating an UDF where I give the new expressions for UPLUS_TRB, DUPLUS_TRB and D2UPLUS_TRB. But, someone told me that I need also change the viscosity. But I don't know how I do that. Please, someone can help me? Where I can find information about this? If I just change the Uplus expression as a function of Yplus, is that correct. Another thing... how I can see/get the values of Uplus to represent it as a function of Yplus? To check what Fluent is assuming. Regards

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November 5, 2012, 10:25		#2
C.C Member CC Join Date: Jun 2011 Posts: 73 Rep Power: 15	Anyone can help me?