Reply To: Specifying the pressure at pressure outlet boundary in multiphase flow

[vipul.gupta]

I am not getting what you are trying to say. 

I am modeling a tundish multiphase involving liquid steel and slag. Liquid steel comes from the Nozzle, and at the top of the tundish slag layer is there. Nozzle is connected with tundish. For ease in modeling, i am modeling in two parts. Part 1 has only nozzle with liquid steel only. Part 2 is tundish flow involving both liquid steel & slag. 

Here are the two-phase contour plots of models. My query is on making operating density zero in the multiphase VOF model to account for the hydrostatic pressure. Fluent says that to specify the gauge pressure at the outlet, it is important to make the operating density zero (Model 1). 

I want to know, do I need to make the operating density zero in the multiphase VOF model?  I am asking because i am giving gauge pressure at one of the outlets.