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Old   October 29, 2004, 05:28
Default mutiphase+turbulence
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Benj
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Hi,

I try to model a stratified multiphase flow (oil+water) in a 5m long pipe 144mm diameter with a velocity of 1m/s. At that velocity the flow should be very turbulent but when I modele it in fluent the flow reamin perfectly stratified... Do you have any suggestion to make on the models I should use with Fluent to observe the instabilities?

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Benj
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Old   November 1, 2004, 04:40
Default Re: mutiphase+turbulence
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zhzhguo
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I think this problem is related to turbulence model that should consider multiphase turbulence model.but in fluent ,the turbulence model is used for all phase, this may not be realistic.
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Old   November 1, 2004, 23:52
Default Re: mutiphase+turbulence
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danny
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hi, Benj:

Do you have any experimental data indicate that in this case the flow is instable? If so you can add a impulse to the inlet boundary condition. By the way, for the oil phase, the flow may be laminar because of the viscosity of the oil.

B. Zhao
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