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2 phases flow system in cylindrical pipe

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Old   February 24, 2006, 02:04
Default 2 phases flow system in cylindrical pipe
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Hi, i am doing a simulation of oil and water in a cylindrical pipe but i facing the trouble that i can't get a convergence result for my simulation. I have tried to iterate it many times after modified the parameters inside fluent but the results still dissapointed me.

Can anyone suggest to me what's going wrong?

Erm...some parameters i used: d=0.0254m, 9.5m; mixture velocity=2.76m/s (and i determine the oil and water velocity by using mass balance after i fixed the volume fraction for them both, for example: water=0.1, oil=0.9,am i right?); steady state; k-epsilon.

so, is that any 1 can help or guide me to get a convergence result?

Thank you

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Old   February 24, 2006, 02:29
Default Re: 2 phases flow system in cylindrical pipe
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Answer the four questions:

how is your meshing? typical radial and axial grid size...

do you use a first or high order scheme ?

what is your y+ (turbulence) value at the walls ?

are you using the steady solver to reach steady state ?

Then It would be possible to answer you...
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Old   February 24, 2006, 04:58
Default Re: 2 phases flow system in cylindrical pipe
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Another point: what multiphase model is involved?

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Old   February 25, 2006, 12:52
Default Re: 2 phases flow system in cylindrical pipe
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Read Tutorial 18 (Using the Mixture and Eulerian Multiphase Models)
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