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Whirlpool Vortex: Angular Momentum Spiral (2D)

2D top-down whirlpool lab: particles spiral into a central drain with angular speed scaling as outer radius over current radius — the same simplified conservation-of-angular-momentum rule as the 3D version — while concentric rings trace the funnel's depth contour.

Fluid Dynamics & Aerodynamics2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

This 2D companion redraws the 3D funnel-and-particles scene as a plain top-down view: particles spiral inward with angular speed scaling as outer radius over current radius, the same simplified stand-in for conservation of angular momentum used in the 3D original, while concentric rings shade in with the funnel's depth curve. Four sliders — vortex speed, particle count, funnel depth and drain (core) radius — each change a distinct term in the spiral, and a live readout panel reports active particle count, drain rate, mean tangential speed and the innermost particle's radius as they respond.

⚙ Under the hood

Particles spiral toward a central drain with angular speed proportional to outer radius over current radius, approximating conservation of angular momentum; funnel depth is drawn as concentric contour rings rather than a distorted 3D mesh.

angular momentumvortexfluid dynamicsspiral flowdrainwhirlpool

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