[hungnguyen1908]

hi all,
I was simulating the flow of Vane tidal turbine. After running in CFX-Solver, I analysed the result in CFX-Post, the direction of flow made me surprised and confused. I mean the direction of flow tends to run from the outlet to the inlet. Physically, the flow must direct from inlet to the outlet.
I divided the inlet and outlet into 2 parts for each (Part no.1 for water, and part no.2 for Air). In term of outlet boundary condition, I setup part no.1 (Water) as "outlet"; meanwhile, part no.2 (Air) is setup as "opening".
If I change part no.2 into "outlet", it will immediately appear the error "Overflow". But if I keep setting up part no.2 as "opening", that'll run well. however, the direction of flow is still wrong in this case.
Are there anyone able to give me some explainations and useful advices for this??? If u really care about my problems, I can send several images of my model and my set-up parameters to u.
Many thanks!