Evaluating heat transfer coefficient for a cylinder

  • Thread starter Laurry
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I'm doing a steady-state thermal analysis for a cylinder geometry.

Inside the cylinder is a heat source and this heat is going to water channel
(modelled with FLUID116 elements) and the air.

For air convection I have to define a heat transfer coefficient which is
dependent on the flow of air around the cylinder.

I'd want to evaluate the HTC analytically and with Ansys CFX.

The cylinder is in a room with known dimensions and the velocity of air
is also known.

1) How do I evaluate HTC analytically? I know I have to calculate
at least Reynolds number and Prandtl number and then Nusselt's number.
After this I'm lost.



2) I have modelled the room with the cylinder in Ansys CFX. Do I somehow
get the HTC as an output from CFX for the elements on the surface of cylinder?

https://www.dropbox.com/s/qxlvtyrtchz46yu/cylinder.JPG
 
Last edited:

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