I am modeling CO2 as a two-phase flow that the flow as a supercritical enters into the tube and after that, I will have two phases (vapor and liquid) because pressure decreases.
I used Ansys AIM to generate the RGP table, so I am not worried about the RGP table. However, when I used HEM, after some iterations I will get the overflow error. Therefore, at first I start the simulation with a single phase for 700 iterations and there was no error (no overflow error or warning message about Table bounds warnings). So I used the single phase results as my initial condition for two-phase. The good thing that the iteration doesn't stop and I haven't got an overflow error but I received the Table bounds warnings. I think that my setup case doesn't have a problem because it worked with one phase.
I would be grateful for your help.