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WALL thermal condition = CONVECTION

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Old   October 3, 2012, 16:11
Default WALL thermal condition = CONVECTION
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sagila
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Dear all,

I have to choose “convection” as the thermal condition for my WALL boundary condition.

Then, what shall be used for “heat transfer coefficient (W/m2.K)”? Does it mean “convection heat transfer coefficient (h)” or “overall heat transfer coefficient (U)”?

Another question: when a wall thickness is defined and there is NO shell conduction, shall I define “heat transfer coefficient” and “free stream temperature” on the wall surface and zone which is NOT facing my fluid zone?

Thanks in advance.
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Old   October 4, 2012, 00:53
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Dear All,
I would appreciate if anyone could help me.
Thanks.
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Old   October 4, 2012, 01:43
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In order to take care of wall conduction, you'll have to user 'U' otherwise consider 'h'.
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Old   October 4, 2012, 02:08
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Hi Mahesh,
Thank you for your reply.
Do you mean I should use "U" for my second question, otherwise I should use "h"?
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Old   October 4, 2012, 03:26
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When you define wall thickness in Fluent, use 'h', if not then use 'U'.
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