[hamidciv]

hi dear all I'm working on a project with one of my friends i do making geometry and the mesh, but I did have problems in the ansys cfx settings , i attach picture of my model in pdf file.I have modeling a flip bucket spillway for compared numerical and experimentaldata, According to the experimental data My goal here is to for Q=600 verified my model, but according Q=VA, basing experimental data in inlet section with depth and velocity with value( D=1.01, b=33.88, v=27.68) my Q is equal to Q=947, because inlet section input after aeration , I think the inconsistency Q due to the high amount of mixing water and air in model.
My problem is the definition of the volume fractions of water and air , note that I read free surface flow over a bump but in this model inlet and outlet At a high level were not,How do I define VOLUME FRACTION UP AND DOWN ( WATER AND AIR)?
whether to achieve the flow rate(Q=600) at the inlet based on experimental data?
I'm so confused and do not mind learning theory, Friends if you have any advice please tell me
Thanking you in anticipation.
regards