A collection of interactive, GPU-accelerated simulations of capillary and interfacial flow phenomena. Every effect runs in real time in the browser (WebGL2) and ships with a clean NumPy spectral reference solver — the same physics, once for speed and once for clarity.
▶ Gallery: https://dmitrylobuznov.github.io/flow-gallery/
| Effect | Status | Demo |
|---|---|---|
| Cahn–Hilliard — phase separation / spinodal decomposition | ✅ live | open ↗ |
| Capillary waves — gravity–capillary surface ripples | ✅ live | open ↗ |
| Thin-film dewetting — rupture & retraction into droplets | ✅ live | open ↗ |
| Rayleigh–Plateau — jet break-up into droplets | ✅ live | open ↗ |
| Marangoni convection — surface-tension-gradient convection cells | ✅ live | open ↗ |
Each effect is a self-contained module under its own folder:
flow-gallery/
├── index.html ← gallery landing page
├── cahn-hilliard/ ← module: WebGL demo + Python reference + GIFs
│ ├── index.html
│ ├── js/main.js ← GPU solver (fragment shaders, ping-pong FBOs)
│ ├── python/ ← reference solver + GIF generator (uv + Typer)
│ └── assets/
├── capillary-waves/ ← gravity–capillary surface waves
├── dewetting/ ← thin-film rupture into droplets
├── rayleigh-plateau/ ← jet break-up (1D slender-jet)
└── marangoni/ ← convection cells (Swift–Hohenberg)
The browser demo trades a little numerical accuracy for real-time speed (explicit finite differences on the GPU); the Python reference is the source of truth for the physics (semi-implicit Fourier-spectral schemes) and generates the animations. See each module's own README for the maths.
python -m http.server 8000 # then open http://localhost:8000For a module's reference solver, see e.g. cahn-hilliard/.
MIT © 2026 Dmitry Lobuznov