[rdrohit20]

Hello,
I want to design a room which has a fresh air inlet, outlet and a recirculation zone so that certain amount of air can be recirculated in to the room.
I have my inlet as a velocity inlet, my outlet as pressure outlet, but i am really confused with the recirculating path boundary condition.
The geometry of the room is attached.
Can someone please help me with this problem. what boundary conditions should i use so that i can have a required amount (say 10% or 20%) of return air.