[hydroturbines]

Hello everyone,

I am working on simulation of a water turbine with CFX.
This is my first work in CFD.
Type of turbine: Francis (radial runner).

I have all the measured data in real turbine (net head, flow and output power).

My doubt is:
What are the best boundary conditions for inlet and outlet ?

Example:
Inlet Conditions: flow
Outlet Conditions: pressure

or
Inlet Conditions: pressure
Outlet Conditions: pressure

I do not know with is the boundary conditions that ensures better results in simulation for efficiency and cavitation.

Please, help me, every reply would be appreciated.

Thank you very much.