Problems in Multiphase Flow
I have been dealing with multiphase flow inside the helically-coiled tube. My case is going to validate the case from an experimental study. The first try is, I do simulation in the single-phase to get the initial solution then continue with multiphase flow.
I set my simulation with Coupled solver and changed several URF to make it stable. But on the process, I have a message that my turbulent viscosity is limited to viscosity ratio and also temperature limited then turn the simulation into diverged with divergence detected in k, vof-1, and pressure coupled.
I use RPI wall boiling model in my case with the second option (Non-equilibrium Boiling). In my BC, in the inlet I put the value of T.I: 4% with my hydraulic dia. and the outlet is gauge pressure 0. The heated wall is set up based on the heat flux in the experimental case, and I put adiabatic wall to ensure fully-developed flow when entered into the domain.
Please give some recommendation on this particular problem. Thanks.
Luthfi Ady Farizan Haryoko