[teimur]

Hi guys, I have a Strange Problem I couldn't Resolve.
I have to simulate Flow around a propeller in Fluent in both cavitating and non cavitating states.
I did the non cavitating stage good enough with
K-Omega turbulence model
coupled pressure velocity coupling
least square cell based gradient
Second order pressure
and second order upwind for rest of spatial discretizations.

as long as Multiphase simulations Use PRESTO! when I switched to multiphase the solution Diverged after a while. I understood that even without activating multiphase cavitation settings and Just changing pressure spatial discretizations from "second order" to "Presto!" the solution Diverges.
Is there any Point I am missing?
Where could the problem arise from?
Regards.