Two Flow region in One Simulation

Can I make two flow region in one simulation.
I want to simulate one Dyson fan which has internal flow and external flow also.
this is the one link which explain a Dyson Fan.(1:30 min video)

Hi, thanks for reaching out to us here in the Forum.

What you can do instead of two separate flow regions is to use a momentum source option.

With that, you can create the regions to accelerate the air in the handle.

Best regards