Hello everyone!

I need to create fan curve of my model. I created a model, mesh for my model that you can see in my attached screenshot. My model consist of fluid zone, inlet and outlet surfaces, solid impeller and rotation zone above impeller. I created interface between rotation zone and fluid zone and made my rotation zone as frame motion ‘cause I try to calculate my task as steady.

I’m trying to figure it out how to set my boundary conditions, what type should they have? My first try was that i set pressure inlet at 0 and pressure outlet at 0 Pa. But my monitors looks terrible. Mass flow rate isn’t stable and I don’t understand when i must to stop my calculation. If you can, I will be very thankful for explanation. Not almost step-by-step, but if You give me a few advices, I will be very grateful. 

 Mr. Pirkl, thank you for your answer by email! 

I’m creating this topic for further discussion. 

In Your letter, You answered, that I need to sweep through different outlet pressures.