How to get the droplet trajectory？

[RachelMeng0096]

As the figure aboved,I'm interested in tracking a droplet to obtain its trajectory line. However, I find myself somewhat at a loss on how to proceed with this task. Would you be able to provide me with some advice or suggestions? Your guidance would be greatly appreciated！

[baperry2]

I'm not sure on this as I haven't actually done it, but here's something you can try.

To track spray droplets you should be able to run with particles.write_ascii_files = 1, which will output a text file with particle locations and data at the same intervals as you are dumping plt/chk files. These files are unlabelled but you can deduce what the columns mean based on how they are written. The first AMREX_SPACEDIM columns are the location, the next several columns contain the particle data as defined here, then the final two columns are the particle id and processor id.

According to the AMReX documentation, the combination of particle id and processor (the processor on which the particle was generated, not where it is) should be unique and allow you to track particles over time.

[RachelMeng0096]

Thank you very much for your response. I also managed to track the droplets I needed in Paraview using a similar method. I am very grateful for your help.