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

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

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

Re: Multiphase models
 

Seems VOF to me...

regards

Re: Multiphase models
 

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

Laika, still orbiting

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

Re: Multiphase models
 

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

Laika, still orbiting

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.