Does somebody know what kind of outlet condition is the most correct? Maybe instead this I should use opening condition but dont know anything about temperature behind superheater. Still I find too high temperatures and no convergence. Maybe this is transient phenomena-but even with this I cant find convergence. Helb is strongly needed. If somebody have experience in this I ask very much about contact.

What exactly is the system? How are you modelling 'superheater'?

Chirag

Power of furnace about 1GW. I model particle tracking because furnace is running on pulverized lignite. Superheater I model as few plate with temperature boundary condition. Probably heat flux would be better but I dont have sufficient data. Did you make some simmilar smulations?