Slug Flow in channel
Dear All
I am trying to model the Slug Flow in rectangular channel by 2D simulation. The dimentions are length=8000mm and height=100mm. The grid consists of 100000 quadrilateral elements. There is some problem in convergence of continuity equation. Major properties of model are: 2d,vof,Standard komega,pressure based distinct velocity inlet for air and water,pressure outlet for outlet equ:flow,volume fraction,turbulence pressure velocity coupling=PISO descretization Scheme:pressurepresto,momentum=quick and for other equations=second order both of phase are incomperssible. Lower 50% of channel is filled by water and upper 50% section is full of water. The enterance velocity of water=2m/s and enterance velocity of air=10m/s. I know the main reason of problem is intial condition. but unfortunately,I cant find the appropriate IC for this turbulence model. Any suggestions will be appreciated. Thanks in advance 
Have you tried with kepsilon?? to knlow if the problem is the turbulence model.

Hi figd84
thanks for your suggestion but I tried ke befor and I have same problem again. 
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