Multiphase models

October 24, 2002, 15:45

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

October 25, 2002, 04:08

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

October 25, 2002, 06:54

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

October 26, 2002, 23:54

Seems VOF to me...

regards

October 28, 2002, 04:18

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

Laika, still orbiting

October 29, 2002, 02:57

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

October 29, 2002, 03:37

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

Laika, still orbiting

November 4, 2002, 08:20

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

October 24, 2002, 15:45	Multiphase models	#1
Nima Sheyad Guest Posts: n/a	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

October 25, 2002, 04:08	Re: Multiphase models	#2
Laika Guest Posts: n/a	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

October 25, 2002, 06:54	Re: Multiphase models	#3
Nima Sheyad Guest Posts: n/a	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

October 26, 2002, 23:54	Re: Multiphase models	#4
CFD Newbie Guest Posts: n/a	Seems VOF to me... regards

October 28, 2002, 04:18	Re: Multiphase models	#5
Laika Guest Posts: n/a	I agree, VOF. Maybe some UDF's are involved for the mass-transfer between phases. Laika, still orbiting

October 29, 2002, 02:57	Re: Multiphase models	#6
Nima Sheyad Guest Posts: n/a	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

October 29, 2002, 03:37	Re: Multiphase models	#7
Laika Guest Posts: n/a	Wouldn't it be better to post it on this forum? I'd like to see it too. Laika, still orbiting

November 4, 2002, 08:20	Re: Multiphase models	#8
erhan arslan Guest Posts: n/a	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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