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-   -   VOF model FLUENT 6.3.26 (http://www.cfd-online.com/Forums/fluent/63629-vof-model-fluent-6-3-26-a.html)

ayyoubmehdizadeh April 14, 2009 18:06

VOF model FLUENT 6.3.26
 
Hi

1. Does anybody know: how accurate VOF model can simulate slug flows?
After 6 month I could get my first air-water slugs, but the length of the slugs and the shape of them are not like what I wanted.

2. And also flow do not follow Backer chart precisely. I mean that I do not get slug flows for the superficial velocities that are reported in Backer chart for slug flows:confused:

3. The interface shape is also not accurate.



Any comment would be appreciated in advance.

P.S. Setup:FLUENT 6.3 - VOF- LAMINAR - VERY FINE MESH - dt=10^-7 sec!! - air-water flow- Microchannel.

changiz_karamian August 12, 2010 07:00

Quote:

Originally Posted by ayyoubmehdizadeh (Post 212895)
Hi

1. Does anybody know: how accurate VOF model can simulate slug flows?
After 6 month I could get my first air-water slugs, but the length of the slugs and the shape of them are not like what I wanted.

2. And also flow do not follow Backer chart precisely. I mean that I do not get slug flows for the superficial velocities that are reported in Backer chart for slug flows:confused:

3. The interface shape is also not accurate.



Any comment would be appreciated in advance.

P.S. Setup:FLUENT 6.3 - VOF- LAMINAR - VERY FINE MESH - dt=10^-7 sec!! - air-water flow- Microchannel.






Hi
my thesies is slug flow in microchannel with VOF method.
you can change your boundary condition in periodic type.
and run again.
by hope.


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