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Microgravity Water Capture: Airflow vs Surface Tension

Interactive 3D simulation of how spacecraft hygiene systems reclaim free-floating water droplets in microgravity — Stokes drag from a suction vent pulls droplets in while surface tension holds them spherical and merges them on contact, versus gravity which just leaves them pooling on a wall.

Space & Astronomy3DModerate60 FPS📱 Mobile-adapted⇄ 2D version

Space hygiene has a plumbing problem: without gravity, water and waste never drain — they just float as spheres held together by surface tension, drifting wherever their last push sent them. This simulation models a cylindrical hygiene-station chamber with a suction vent at one end, applying real Stokes drag from a directional airflow field so free-floating droplets get pulled toward the vent and captured, merging on contact under a Young–Laplace surface-tension model. A gravity toggle shows the alternative most people assume would work — pulling droplets down onto a wall, where they simply pool unreclaimed, since only airflow (not orientation) actually reaches the vent. Adjust suction strength, surface tension, and release rate, and watch live readouts track how much water gets reclaimed versus stuck.

⚙ Under the hood

A 3D simulation of a spacecraft hygiene chamber where free-floating water droplets are pulled into a suction vent by Stokes drag from an airflow field, merging under surface tension along the way — with a gravity toggle showing why gravity alone just pools water unreclaimed on a wall.

spacemicrogravityfluid-dynamicssurface-tensionlife-supportspacecraft

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