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Old   October 1, 2009, 18:24
Post Slug Flow in channel
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yasna razavi
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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 k-omega,pressure based
-distinct velocity inlet for air and water,pressure outlet for outlet
-equ:flow,volume fraction,turbulence
-pressure velocity coupling=PISO
-descretization Schemeressure-presto,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
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Old   October 2, 2009, 09:20
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Felipe Gutiérrez Donoso
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Have you tried with k-epsilon?? to knlow if the problem is the turbulence model.
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Old   October 2, 2009, 14:21
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yasna razavi
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Hi figd84
thanks for your suggestion but I tried k-e befor and I have same problem again.
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