How to see trajectory of a bubble?
 

Hi everyone

I simulated air bubble in water 3D, I used VOF model, air velocity inlet, and pressure outlet, also other things.
i want to see trajectory of bubble, how I can do it?

I think that i have few options.

-Track particle, I have read about it, but I havent learnt enough to do it, if this is the right way to do it, can you help me?
-animate, my problem with this, is that I have a 3D model and I see volume of fraction, so the water not allow me see the bubble, maybe there is a way
to see only the air phase and contour.??
-I used pathline, but this only show the trajectory of a non-mass particle at current timestep (i have understanding), i want to see trajectory of a bubble in a period of time (since formation until bubble arrive at free surface)

someone can help me??
maybe exist another way?

best regards

Did you get the solution to this problem? If yes, could you please help me? I am having the same doubt.

Getting the trajectory in FLUENT directly is not possible - if you have a single bubble, however, it's relatively straightforward to get the center of mass. You can do that using a UDF that computes the center of mass from the phase-fields, and stores the coordinates in (for example) a text file that you can open in excel, matlab or another program of your liking. Alternatively, store the phase-field every timestep (or X timesteps) and get the center of mass in post-processing, such as MATLAB.