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why heat transfer coefficient has a minus?

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Old   August 15, 2007, 04:57
Default why heat transfer coefficient has a minus?
  #1
eve
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Hello Everyone

I have a problem again.I check heat transfer coefficient by Report- surface integral- area-weighted average- surface heat transfer coefficient. And i have a minus i want to know what's it means?

Thank you everyone.
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Old   August 15, 2007, 08:50
Default Re: why heat transfer coefficient has a minus?
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Prasad
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http://electronics-cooling.com/artic..._techbrief.php

Have a look at this link. It might help you!
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Old   August 15, 2007, 09:06
Default Re: why heat transfer coefficient has a minus?
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Prasad
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Also make sure you have correct reference Temperature Report>Referencevalues Temperature

If this is higher than Tmean, you may endup having negative HTC.
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Old   August 16, 2007, 00:44
Default Re: why heat transfer coefficient has a minus?
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eve
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Ok,thank you very much.
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Old   August 16, 2007, 00:52
Default Re: why heat transfer coefficient has a minus?
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eve
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I'm again

When i have a negative HTC.It's means my simmulation was wrong or not? And the solution is?

Thank,Eve
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