convergent duct water flow
 

i want to simulate flow in a passage from a duct, in which water enters with a mass flow rate of 25 kg/s and flows out through convergent outlet.

so i meshed in ICEMCFD.. inlet condition is mass flow rate ..25kg/s
outlet static pressure 0 pa with 1 atm reference pressure.
I am solving it in cfx
i want to know whether these BC's are ok?
in another model i introduced a half vane with a shape of airofoil...
with same boundary conditions.. should i give fluid interface?