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Nima Sheyad October 24, 2002 15:45

Multiphase models
Hi everybody, I would like to solve a two-phase annular flow in a tube (r-22 & it's vapor). I have Fluent 5.23 software which has three kind of multiphase models as follows: 1-VOF, 2-Cavitation, 3-Algebric Slip. Could you please tell me with which multiphase model can I solve my problem? Thank you in advance

Laika October 25, 2002 04:08

Re: Multiphase models
How comes you don't have Fluent 6?

The model you should use, depends on what you want to simulate. What phisics are involved?

Laika, still orbiting

Nima Sheyad October 25, 2002 06:54

Re: Multiphase models
Hi, The model which I want to simulate is a co-current downward ( or horizental ) annular film condensation flow in a tube.We assumed that entrainment of liquid in the vapor core is negligible and that the liquid flows in a thin film in a smooth-walled tube. Thank you in advance Nima

CFD Newbie October 26, 2002 23:54

Re: Multiphase models
Seems VOF to me...


Laika October 28, 2002 05:18

Re: Multiphase models
I agree, VOF. Maybe some UDF's are involved for the mass-transfer between phases.

Laika, still orbiting

Nima Sheyad October 29, 2002 03:57

Re: Multiphase models
Hi everybody, Many thanks for your help . Could you please tell me how can I write a UDF fo mass transfer(condensation) at vapor/liquid interface? If you send me such a UDF(if you have) I would be thankful. Regards

Laika October 29, 2002 04:37

Re: Multiphase models
Wouldn't it be better to post it on this forum? I'd like to see it too.

Laika, still orbiting

erhan arslan November 4, 2002 09:20

Re: Multiphase models
hi, if you have condensation mass transfer udf, and if possible I also want it. on the other hand I need evaporation of udf.

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