- #1
Laurry
- 16
- 1
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 modeled 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
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 modeled 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: