What boundary condition should i use?
 

I am designing low speed open type sub sonic wind tunnel(Mach NO~0.1). I completed my geometry and meshing i got struck at what boundary conditions should i use? Currently I am using Patm(static pressure inlet= atmospheric gauge pressure i.e Patm=0 pa) and mass flow rate boundary condition as outlet. Along with pressure inlet I am giving 0.5% turbulent intensity and 1 cm turbulent length scale. Are these boundary conditions correct?
please help me your help is much appreciated.

In this case fan is driving the flow. Total pressure at inlet and static pressure at exit would be atmospheric. The fan model has to supply the total pressure jump. Mass flow is controlled by total pressure at exit.