Home▸Physics & Mechanics▸Ink Drop Diffusion: Fick's Law, Stokes-Einstein D and the Variance Law (2D Lab)

💧 Ink Drop Diffusion: Fick's Law, Stokes-Einstein D and the Variance Law (2D Lab)

2D ink diffusion in water: conservative Fick solver, Stokes-Einstein D(T, a), Gaussian spreading, variance law and mass conservation checks, time-lapse and eddy-mixing factor.

Physics & Mechanics2DEasy60 FPS📱 Mobile-adapted⇄ 3D version

⚙ Under the hood

A 160 by 160 Fick-law diffusion lab for an ink drop in water: Stokes-Einstein diffusivity from temperature and molecule radius, Gaussian spreading, the sigma squared equals sigma0 squared plus 2Dt law and exact mass conservation, with a time-lapse clock.

DiffusionFick's LawStokes-EinsteinRandom WalkCanvas 2D

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