Active Matter: Motility-Induced Phase Separation

A 2D box of self-propelled active Brownian particles — each injecting its own energy along a slowly-drifting heading, unlike a purely passive Brownian particle — collides and jams via short-range repulsion only, with no alignment rule. Tune packing fraction, propulsion speed and orientational noise and watch the population flip between a uniform, passive-looking gas and spontaneous motility-induced phase separation into dense, slow clusters surrounded by a dilute gas, tracked live by a largest-cluster order parameter.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install