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heat transfer coefficient ?????

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Old   March 23, 2005, 17:15
Default heat transfer coefficient ?????
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Babu
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Hi all:

When I was plotting htc's (wall heat transfer coeffecient's) in Fluent I see strange numbers (-ve values in 1000's when flow is incompressible having mach number < 0.1). I checked fluid and wall temepratues, it was showing correct values. I used references tables to plug values from there. I suspect something went wrong somewhere. Can anybody help me in this regards.

thanks in advance (very urgent to me) Babu
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Old   March 25, 2005, 06:44
Default Re: heat transfer coefficient ?????
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Alex
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Fluent calculates h through the reference temperature in "report" -> "reference values". You should first calculate mass-average temperature in the section where you r interested in h calc-s. Then, plug it into the reference value. Hope it helps.
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Old   March 27, 2005, 03:47
Default Re: heat transfer coefficient ?????
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dpshaka
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fluent is not a very smart animal.

i often let fluent caulate heat flux first ,then the temperature difference ,and area . then i get the value of h
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Old   April 1, 2005, 02:42
Default Re: heat transfer coefficient ?????
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Alex
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dpshaka if you have a heat flux, what do you need the area for?
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Old   April 3, 2005, 04:27
Default Re: heat transfer coefficient ?????
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dpshaka
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i am sorry ,i give a wrong concept
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