Hi.. During iteration...I got a message in Browse additional output file.

"Warning #001 fluid inflow detected at some outflow boundaries where mass fluxes are forced to zero if this condition persists,your results might be wrong. The outflow boundary might not be well specified or the grid might be too corse near the out flow boundary"

My grid is not corse.. What I need to do...

thank for your help.

Try a pressure condition in place of outlet or extend the length of your domain.

HV

correct, it not allowed to put an outlet b.c. in a recirculation zone. try a pressure b.c. or extend the domain as HVN proposed

Isn't it influenced on reference pressure cell??

thank you for your answer.

no