Скачать или смотреть "Leftons" and "rightons" under weak gravity

The particles in this simulation have a weird interaction, which I introduced a while ago in the video    • CERN scientists discover new particle, wit...   , that was meant as an April fool's joke. The interaction between particles is similar to a Coulomb interaction, but the direction of the force is turned by 90 degrees. This probably does not make much sense physically, even in two dimensions, and I am not even sure energy is conserved. However, the resulting dynamics is quite interesting, as the particles tend to form clusters of the same "charge". For lack of a better name, we may call these particles "leftons" and "rightons", but feel free to come up with alternatives.
In addition to the weird "rotated Coulomb" interaction the particles are subject to gravity and viscous damping. Additional particles are randomly generated just above the displayed region in the course of the simulation.
The particles' color depends on their "charge". The background color depends on local charge, slightly averaged over space and time.
To save on computation time, particles are placed into a "hash grid", each cell of which contains between 3 and 10 particles. Then only the influence of other particles in the same or neighboring cells is taken into account for each particle.

Render time: 6 minutes 47 seconds
Compression: crf 23
Color scheme: Twilight by Bastian Bechtold
https://github.com/bastibe/twilight

Music: "Lulu" by Underbelly‪@yousuckatproducing‬

Current version of the C code used to make these animations:
https://github.com/nilsberglund-orlea...
https://www.idpoisson.fr/berglund/sof...
Some outreach articles on mathematics:
https://images.math.cnrs.fr/auteurs/n...
(in French, some with a Spanish translation)

#ions #particles