[sy2516]

Hello,

I am going to create a box to represent the environment and a other box to represent a room where there is one face is open but other faces are. When I using boolean operation, the software will identify all the box faces as walls. How can I make one face as open face? which boundary condition should I assign to the face? It seems that fluent treat them as two separate fluid domain but it should have a connection face where fluid can pass through without barrier.