How to apply CSURf in 3D polar problem?

[Natt]

Hello,

I am working on a 3D heat problem. I am trying to impose thermal flux in the internal part of the hollow cylinder and temperature on the external part (Icili_1). I used CSURF but it doesn't work maybe I define wrongly the area where I want to impose flux. Also, I don't know if I need to use CBOUN before CSURF or when I use CSURF I don't need to restrain the boundaries before.
As CSURF wasn't working with polar coordinates I made a second mesh (Icili_sides) with cartesian coordinates and applying the SIDE command but It doesn't work with flux.
I attach both of them.

Thanks in advance.

Natalia

[Natt]

I forgot to attach the first mesh

[Prof. S. Govindjee]

Here is an example you can work off:  http://feap.berkeley.edu/wiki/index.php?title=Hollow_thermal_tube

[Prof. S. Govindjee]

Here is a 3D version: http://feap.berkeley.edu/wiki/index.php?title=3D_hollow_thermal_tube

[Natt]

Dear Prof. S. Govindjee,
Thank you very much for your help and quick response.
Natalia