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i´m studying cavitation in a knife valve preceded by 3 plate-horifice devices. The geometry is 2D. I´ve done a steady, turbulent (k-epsilon) simulation to stablish a initial flow field without activating the cavitation model. After have a good convergence I´ve included the cavitation model, changing the pressure-velocity coupling to Simplec and linear pressure discretization.

I´ve been testing many under relaxation factors but I have divergence with every of them. I´ve tried unsteady solution with 0.0001s time step, but obtained the same result.

Any advice on this??

Thanks in advance