Maybe I approached my project wrong. To better understand how I come to this problem, I explain it:
I have a laminar 2D-pipe flow with a constant mass-flow at the inlet and a constant pressure outlet. I'd like to get to know what inlet pressure I'll get, when I change my mass-flow values. I think the easiest way is to do it with Design Points and then set the inlet mass-flow as an input parameter and the inlet pressure as an output parameter. Then I change the mass-flow values in the Design Points.
Do you think that works with this method?