wall heat transfer coefficient

elsa · March 22, 2010, 19:19

I have made a wind tunnel; wall is 60 celsius and the air is 25 degree. But the wall heat transfer coefficient is a fluctuating diagram. I've checked everything.
does anybody know why is happens?

ghorrocks · March 23, 2010, 06:28

Have you tried these tips?

http://www.cfd-online.com/Wiki/Ansys...gence_criteria

What do you mean by "But the wall heat transfer coefficient is a fluctuating diagram"? Are you running steady state or transient? How are you monitoring wall heat transfer coefficient?

March 22, 2010, 19:19	wall heat transfer coefficient	#1
elsa New Member elsa Join Date: Mar 2010 Posts: 7 Rep Power: 16	I have made a wind tunnel; wall is 60 celsius and the air is 25 degree. But the wall heat transfer coefficient is a fluctuating diagram. I've checked everything. does anybody know why is happens?

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March 23, 2010, 06:28		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Have you tried these tips? http://www.cfd-online.com/Wiki/Ansys...gence_criteria What do you mean by "But the wall heat transfer coefficient is a fluctuating diagram"? Are you running steady state or transient? How are you monitoring wall heat transfer coefficient?