Boundary conditions Inlet pressure from 4 bar to 10 bar gauge. Outlet pressure 1 bar absolute. I need to calculate the mass flow rate. But as my solution was diverging for these Boundary conditions I decided to take mass flow inlet and pressure outlet. and try to solve the numerical. But the same divergence problem is occurring. I also want to check whether the flow is supersonic or not that's Why I m using a density-based solver. Steady-state condition. n