Combustion
 

Hi guys,

I am modeling a compressible turbulent non-premixed combustion in a nozzle.
I have some problems with boundary conditions and solver:
I set pressure inlnet for Air Inlet, pressure far-field for Outlet, velocity inlet for
Fuel Inlet. But for the walls I have no idea. Should I set all of them Heat Flux Zero? Should I let fluent to solve it by deafault conditions?

+

Fluent does not let me to solve it by density based solver. Why? What should I do for this problem?

Thanks in advance.