check the boundary condition and definition of the bubble

which parameter make the bubble moving.

I prefer to use ANSYS FLUENT software

I never used this software, sir. Thank you.

Dear Bacha Munir,

I think that your problem is possible in COMSOL. The couple between the attached two examples may give you some hints.

Best Wishes,

Muneer

I am agree with Dr. Muneer,

By the way, comsol sometimes is peaky with grid movements. In addition, you may find serious problems with the bouble next to the walls or when it reaches to the wall. You need to use some functions to control it next to walls.

I am agree with Dr. Muneer

Thank you so much all, for your great comments. I think this will be good if anyone knows this work and check my attach mph file.

Good luck.