🌀 Whirlpool Vortex — 2D Rankine Flow with Draining Tracers

2D companion of the 3D whirlpool: a Rankine vortex (solid-body core, irrotational outside) with a line sink, hundreds of RK4 tracers, the measured speed profile, the free-surface depression from Bernoulli, and three numerical checks.

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