Issues with Drop Impact Simulation in Basilisk

[Nivesh Mishra]

Hello Basilisk users,

I’m currently running a simulation where a drop impacts a liquid pool, but I’m facing a few issues and would really appreciate your guidance:

Restart Problem on Supercomputer
When I run the simulation on a supercomputer, the restart files are not being written, so I’m unable to resume the simulation once it's interrupted. Is there something I might be missing regarding output or file I/O settings for restarts?

Measuring Physical Quantities
I’d like to measure:

The diameter of the entrapped bubbles/drops

The velocity of the jet when the crater collapses

I’m unsure how to extract or compute these quantities within the Basilisk framework. Any suggestions on how to do this—maybe using events or post-processing techniques—would be extremely helpful.

Formation of Small Satellite Droplets
In the attached image, you can see multiple small droplets forming around the crater. I’m not sure why these are appearing or how to eliminate them. Currently, I’m using a maximum refinement level of 10. Could it be related to resolution, numerical noise, or some artifact of interface reconstruction?

Thank you in advance for your help and suggestions!

[Wojciech (Voitek) Aniszewski]

Dear Nivesh, I take it it *does* save the snapshots when not on a supercomputer? How do you write to the disk i.e. use the dump()/restore() ? cheers v