[Othman]

Hello everyone
Please, any one can give me some information about how can I setting up a two fluid model (two phase flow) in Flow-3D program (version 11.2) to represent the air-water flow behaviors in pressurized tunnel of morning glory spillway (as showed in the attached image file). By the way, alot of times I tried to running the model by readjusting the parameters (like as follows) to give the appropriate result but, unfortunately still now I don’t know what the problem in this model that doesn’t work properly. Please kindly give me some information about setting up two phase flow modeling in pressurized tunnel and which of those parameters are incorrect according to your experts.
Thanks for providing any helps and information.
Applied properties and parameters:
Number of fluids: Two fluids
Interface tracking: No sharp interface
Flow mode: Compressible
Physics
Bubble and phase change: selected two fluid phase change
Accommodation coefficient=0.01
Density evaluation: Second order monotonicity preserving approximation to density transport equation
Drift-flux
Average drop diameter=0.001 m
Drag coefficient=0.5
Richardson- Zaki coefficient multiplier =1
Minimum volume fraction of phase #1=0.1
Volume fraction of phase #2 at inversion point=1
Heat transfer : Second order monotonicity preserving
Viscosity and turbulence: selected viscous and laminar flow