Which radiation model for boundary conditions in solid media?
 

Hi,

I'm doing a fairly simple 2D axisymmetric simulation of heat conduction through a solid media, with heat generation.
Boundaries are convection with ambient free stream temperature, and a heat flux.

I know little about radiation modeling and until I learn more about it, I was hoping someone could tell me which of the radiation model is appropriate here.

Please note that all I know is the surface emissivity, but nothing about material absorption, scaterring factors, etc. Although I can probably estimate these.

Thanks for looking.
Florin