Air aspiration
 

Hi all,
i'm trying to simulate an extraction of air from a room.i have a rectangular surface in one of the walls i'd like model as an aspirator.Since i want to simulate a fire inside the room,i need to understand if it possible to set a surface as a "velocity outlet" mantaining the information about the Temperaure.
Thanks mates!

set at velocity inlet and use negative value for magnitude.
ok for incompressible flows.
Or specify as mass flow inlet and specify vector direction as outwards.
Must have somewhere to draw mass and momentum in from though so it is balanced!