what's the best commerical CFD software for fire?

yin rumin

Now I'm doing my research on the fire simulation in atrium. I need to simulate the fire happened in an atrium with complex geometry, I want to include the combustion, which could give the shape of fire plume, and the sprinkler water spray interaction. I have used the commerical software such as CFX and PHOENICS and SOFIE for such things. I also develop the software myself. but all are not so good. I want to try the FIDAP, but I don't know whether it is good enough for such situation. I heard from one guy that there are one software was developed especially for fire simulation. Could any experts tell me that which is the best software for such simulation, especially easy for generating grid system of complex atrium geometry.

Thanks in advance!