Hello, I want to simulate air being sucked into a pipe connected to pump. I want to see how the velocity vectors are formed and what will be the plume of air being sucked in.

Example: I want to see how air around a vacuum cleaner duct behaves as it gets sucked in when you switch on the machine.

What kind of boundary condition can I give to the domain.

Thank you.

Pressure inlet with total pressure of 1 atmosphere (abs). Make sure it is far enough away from the device.