Discrete Phase and multiphase
 

(1)I am using smoke particle and air . Can anyone tell me whether I should use multiphase or discrete phase model? (2)If at the pressure-outlet of a pipe the pressure is atmospheric and I am taking operating condition(in FLUENT) to be atmosphere then Can I take the pressure-outlet to be at 0 gage pressure in the boundary conditions panel?

Re: Discrete Phase and multiphase
 

Whatever the pressure u eneter in is always with respect to the operating pressure. So u have to use o only in the condition.