CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

VOF Problem, Bubble must not rise

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   July 3, 2014, 05:23
Default VOF Problem, Bubble must not rise
New Member
Victor Pannel
Join Date: Mar 2014
Location: Marseille (France)
Posts: 12
Rep Power: 12
CneSpaulding is on a distinguished road
Hi gentlemen,

I'm stuck for 2 weeks on my case, I really don't know how to solve my problem.
That's why I'm writing those few words to ask for some help.

My domain is a 3D rectangle wich represent the 1/4 of the real domain ( I'm using symmetry planes).

I have 2 regions (The rectangle is cut in the middle), wich are glass on the bot and water+air in the second one).

I have a thermal source in the corner of the middle of my domain ( between the 2 symmetry planes ).

I have to modelize a 1/4 air bubble in the corner WICH MUST:
-Stay in the corner
-Keep the same geometry
The bubble is surrounded by water.

The goal is to modelize natural convection in the air&water induced by Boussinesq & Marangoni

My initialization seems correct but in the first iterations the bubble decomposes.. ( I think this is a surface tension problem)

I used for this simulation:
VOF Model // Eulerian Multiphase // Segreted Flow&Temperature // Laminar
Water: Constant density, Laminar
Air: Ideal gas (Error solver diverged), Laminar

I tried Steady and Unsteady models but I have the same behavior.
Surface tension is a function of Temperature.

I did not found any topics for Marangoni problems...
If you have any advices or if you studied the same case do not hesitate to reply!

PS: You can find 2 Screenshots.
CneSpaulding is offline   Reply With Quote

Old   July 3, 2014, 13:41
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24
me3840 is on a distinguished road
Your interface between the gas and the water looks to be far too coarse.
me3840 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bubble coulmn and VOF method (interFoam) voingiappone OpenFOAM 14 June 26, 2012 20:13
problem about VOF and species couple Cloud FLUENT 0 June 15, 2012 01:23
VOF simulation problem parisa- Main CFD Forum 0 January 10, 2012 08:33
a problem of incompressible two phases(water and gas) with VOF Method zhangweisnoopy Main CFD Forum 9 August 12, 2011 08:25
Problem of smearing vof air-liquid lupoigloo STAR-CCM+ 0 November 30, 2009 11:27

All times are GMT -4. The time now is 03:49.