Large space simulation

Yazhuo Qian

Dear all,

I met a problem in Large space simulation.

I simulate the outdoor airflow around buildings, and the domain height is about 100m height. Since I set the Gravity force to be constant, and Outlet external pressure 0 relative to 1E+05 pa.

Then the pressure stratified in the domain because of the height, and most of the area is negative pressure. That makes sense since the higher the position, the lower the pressure. Then the problem is the flow can not go out of the outlet, because the pressure inside the domain is lower than outside.

Could anyone help me with that problem?