Quasi-static multiphase flow?
 

Hi,

As a part of my thesis work, I'm modeling a cavitating impeller in water.

My thesis advisor recommended me to do a quasi-static investigation in STAR-CCM - but I'm wondering if that would be also feasible in OpenFOAM.

In STAR-CCM, the plan is to model only one blade as a symmetric angular section.
We'd need full multiphasic flow to see real effect - I've been investigating the
interPhaseChangeFoam solver, if that could be somehow applied. We'd however need compressible flow in the gas phase for any accuracy though.

I was wondering is this kind of approach feasible in OpenFOAM, or would I need to do a full unsteady simulation?

local time step (LTS) is the keyword you are looking for. InterFoam has a LTS implementation.


Cheers,
Cyprien

OK, that looks promising. But what about symmetry? We're symmetrical in cylinderical coordinates.

Optimally the whole solver should be in cylinderical coordinates - is that possible?

openfoam uses cartesian coordinates

Thanks, as my system has 6 blades it sounds like only half-plane symmetry would be usable, correct?

//HS