So I have a "kinda" spherical but symmetric pressure vessel.
Inside this pressure vessel there is water.
I have a series of (lets call them) soda straws blowing air through the water.
And then an exhaust a the top of the tank.
I am trying capture what configuration of "soda straws" creates the lowest pressure drop. I am not looking to do multi-phase flow.
My problem/question stems from the fact that for the life of me, I cannot figure out how to model the water level in this vessel as it has an air-gap at the top.
I've tried using a cap and fluid subdomain and have tried putting a solid in that would be the water volume and disable that solid.
Neither approach worked.
Thanks in advance.