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💨 DSMC Rarefied Gas Flow: 2D Kinetic-Theory Particle Lab

2D Direct Simulation Monte Carlo (DSMC) lab: ballistic particles binned into cells, No-Time-Counter stochastic collisions, and a live Knudsen number computed from real kinetic theory as you change density, molecular size and grid resolution.

Physics & Mechanics2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

This 2D companion runs the same Direct Simulation Monte Carlo method as the 3D lab on a plain canvas built for reading the statistical mechanics directly: individual molecules drift and collide with Bird's No-Time-Counter algorithm inside a visible cell grid, a live Knudsen number is computed from the real mean-free-path formula as you change particle density and molecular diameter, and a running speed histogram compares the gas against the theoretical 2D Maxwell–Boltzmann curve so you can watch it thermalize in real time.

⚙ Under the hood

2D DSMC particle lab: ballistic free flight each step, per-cell No-Time-Counter stochastic collisions, and a Knudsen number computed live from n, molecular diameter and obstacle size — real kinetic theory, not decorative particles.

dsmckinetic theorymean free pathknudsen numbermonte carlorarefied gas dynamics

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install