How to analyze and simulate a close loop airflow with a heating source and airblower

Hi , and Happy New Year to every one.

I want to analyze and simulate a close loop airflow with a heating source and airblower.

airblower sucks air from lower chamber and blows to upper chamber,

where the air passes from the flame of the burner, and comes again to lower chamber.

kindly see the attached picture.

plz guide me to do this in a proper way, as i want to simulate with time dependent option,

and see temperature at different zones,  and to calculate the rise in temperature per time,

hope for the best from forum guys.

thnx in advance.