[kuplulumert]

Dear all,

I would like to ask a question about defining a specific boundary condition for my analysis. I am trying to simulate a pipeline which transfers polymer inside it. The boundary conditions are; inlet pressure 3500 psi, inlet mass flow 0.8 kg/s, outlet pressure 1000 psi (it is not open to the atmosphere, there is another pump at the exit.). Whatever I do about defining boundary conditions, I could not obtain these boundary conditions at the same time. If I give pressure inlet, I cannot obtain velocity/mass flow rate or if I give mass/flow rate, I cannot obtain the pressure value.

I attached the mass flow inlet and obtained pressure images. Even though i put the exact pressure inside the flow rate, the inlet pressure does not take that value.

I would be glad if someone has a solution about it.