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Hi guys,

I'm currently trying to compute an diagonal pump using Fine/Turbo with incompressible fluid under low Re number. Due to it's incompressibility and low Re number, I'm having a hard time procuring convergence. The global performance is very unstable, with a pattern of constant vibration and sometimes it diverges. How can I improve the stability and convergence of my computation under these circumstances? I need some tips on smoothing residuals and procuring convergence under low Re and incompressible.

Here are some of my parameters used:
Reynolds number: 147 ~ 884
Ref. Velocity: 0.03275 ~ 0.1965 m/s²
Hakimi Preconditioning Beta: 6000
Sweep scheme definition: Increase on higher level
CFL: 3

Thanks in advance for any help! Would really appreciate it.