Thermo-mechanical analysis ( Heat transfer due to radiation and convection)

[manishkrsharma]

Hi,
I know you place tremendous value on your time so I’ll be brief.
I am trying to do a thermo-mechanical analysis of a closed region (H=75cm). In this region, at the bottom, the Temperature is around 700 degree. A structural beam is placed at the height of 25 cm from the bottom surface in closed region.
I want to simulate the heat transfer from the bottom surface to beam due to convection (because air is there as a medium in closed region) and radiation.
So, I am looking forward valuable suggestions from everyone to solve this problem and to understand the following points:-
1. Can we define air as a medium for heat transfer in abaqus? , if yes then How?
2. How can I define heat transfer by radiation and convection simultaneously to beam?
I am a newcomer for thermo-mechanical analysis. I am waiting for your valuable response.

Thanks
Manish