Скачать или смотреть A 25%-75% mixture of charged particles in a central gravity field

In this variant of the simulations    • Charged particles crystallizing in a centr...   ,    • A 40%-60% mixture of charged particles in ...   and    • A 30%-70% mixture of charged particles in ...   , 75% of the particles have positive charge, while 25% have negative charge. The size of the particles and the intensity of the Coulomb interaction have been decreased, while the gravity force has been increased, because otherwise they would form quite a dilute cloud.
The particles are subject to a gravity field directed towards the center of the shown region, a Coulomb interaction, and viscous damping. The damping has been chosen quite strong here, to allow the particles to form a crystal-like structure. When particles of opposite charge become close to each other for a sufficiently long time, they react to form a diatomic molecule. Unlike in some previous simulations on this channel, they keep their charges after reacting.
The particles' color depends on their charge.
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: 43 minutes
Compression: crf 23
Color scheme: Twilight by Bastian Bechtold
https://github.com/bastibe/twilight

Music: "Last laugh" by Patrick Patrikios‪@patrick-jordan-patrikios‬

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 #chemical_reactions