[adamt1991]

Hello everyone

I am trying to model heat transfer in power cable. It consist of the ring-shaped isolation (pvc) and heatflux inside the ring that reflects the heat generated by the electric current inside the wire. I have created 2d model without solar load and everything works fine. Then I decided to include solar radiation in my model. It is only available in 3d so I created the new 3d model and heat transfer is modelled properly but fluent doesn't include the solar radiation effect. The program says that the surface between isolation and surrounding air is not the right kind of surface. I created mesh interfaces (coupled wall) in this place. It looks like the program is ignoring this surface.

Please help me in finding the right sollution. How do you create the typical solar load model like in this tutorial:
https://www.youtube.com/watch?v=ZEzvVhhYqCc
Is there any chance to avoid the interface problem in such cases?
Can I model the solar effect in 2d by creating a wall which radiates similar to sun?

Thank you in advance for any hints.
Regards
Adam