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(Two phase)Bubble shrink in a two phase flow

Posted 14 ott 2014, 14:32 GMT-4 Fluid & Heat, Computational Fluid Dynamics (CFD), Microfluidics Version 4.3a, Version 5.2 3 Replies

Junxiang Shi
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I want to simulate a bubble dynamics in the water.
I initialize a bubble in the water, and use phase-field model.
I give the water a velocity in a channel, the bubble moves with the water.
After a few time steps, the bubble become smaller and smaller, than disappear!!!
It is very odd, as I set incompressible flow and a uniform mesh.
Other parameters are default.
What is the reason for this phenomenon.

Thanks.
3 Replies Last Post 14 apr 2016, 04:12 GMT-4
COMSOL Moderator

Hello Junxiang Shi

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Ninh Tran
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Posted: 8 years ago 8 mar 2016, 07:50 GMT-5
Dear Shi,

do you have now the result of your simulation? Because I am also interested in this topic, including coupling with AC/DC field.
Dear Shi, do you have now the result of your simulation? Because I am also interested in this topic, including coupling with AC/DC field.
烨 王
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Posted: 8 years ago 15 mar 2016, 07:24 GMT-4
You can check the quality of the grid, and try to refine the grid to ensure the mass conservation
You can check the quality of the grid, and try to refine the grid to ensure the mass conservation
Vitul Raj Govindaraju
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Posted: 8 years ago 14 apr 2016, 04:12 GMT-4
Try to use a global probe variable to conserve the volume fraction of each phase.
Try to use a global probe variable to conserve the volume fraction of each phase.

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