[Atze]

Hi all.

I've a problem in simulating a Buoyant Ideal gas inside a closed domain.
Here is the problem.

If I use Air Ideal Gas I obtain a constant absolute pressure field, with a variable density and velocity field

If I use a constant density gas I obtain a Isochoric compression with no buoyancy.

How can I simulate a buoyant gas AND an increase in internal pressure due to temperature increase? Have I to use real gas model?

Thank you