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Old   March 22, 2010, 20:19
Default wall heat transfer coefficient
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elsa
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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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Old   March 23, 2010, 07:28
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Glenn Horrocks
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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?
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