# Heat transfer coefficient calculation h

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 September 27, 2016, 08:13 Heat transfer coefficient calculation h #1 New Member   Join Date: Sep 2016 Posts: 5 Rep Power: 3 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 ? Thank you.

 September 27, 2016, 14:48 #2 Senior Member   Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 715 Rep Power: 13 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? monkey1 likes this.

September 28, 2016, 03:22
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 Originally Posted by evcelica 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) ?

 September 28, 2016, 15:56 #4 Senior Member   Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 715 Rep Power: 13 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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