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Old   September 27, 2016, 08:13
Question Heat transfer coefficient calculation h
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Hello guys,

Please, anyone can tell me how cfx calculate the convective heat transfer coefficient h(W/m2-K) in the case of adiabatic wall cooling by air ? In the tutorial they said that it can be calculated by this equation h=q/(T0-Tw), T0= flow temperature , Tw = Wall temperature. so how cfx can calculate q ?

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Old   September 27, 2016, 14:48
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Info on this is in the FAQ.
http://www.cfd-online.com/Wiki/Ansys...ficient_in_CFX

But for an adiabatic wall, the equation becomes 0/0, so there should be no heat transfer coefficient?
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Old   September 28, 2016, 03:22
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Quote:
Originally Posted by evcelica View Post
Info on this is in the FAQ.
http://www.cfd-online.com/Wiki/Ansys...ficient_in_CFX

But for an adiabatic wall, the equation becomes 0/0, so there should be no heat transfer coefficient?
Thank you Evcelica for your answer, but i wanna know which equation cfx use to calculate q (heat flux) if h=q(To-Tw) ?
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Old   September 28, 2016, 15:56
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Sorry, but I don't know what you mean.
Wall Heat Flux would be (heat flow normal to wall) / (cell area)
For adiabatic it should be 0 / area = 0.
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