Dear Abdul,

Thank you for the answer and dr. Onde day maybe Ill be one :) The simullations I am running, are the steady one. And as matter of fact, I am very familiarwith one fluid simulations.

For settings, I am using mostly VR for settings and smt q1 file. Usualy it is not the problem to start the simulation with two fluids, but the convergence gives me the "saw diagram".

Of course, when I am running the one fluid equivalent of the simulation, the convergence is excellent. So, I think I am missing fine tunning somewhere.