Fluid Sim runs a real-time Navier–Stokes fluid solver on your Pebble. Dye is advected through a velocity field with diffusion and incompressible projection, producing continuous swirling, splashing, and mixing that responds to your input.

  CONTROLS
  • Hold UP or DOWN to fire two angled jets that collide and mix near the center.
  • Hold SELECT to add a rotational stir to the whole field.
  • Tap or drag the screen (Pebble Time 2) to inject a swirling blob of dye at the touch point.
  • Tilt the watch to apply a gravity force; the fluid flows in that direction with added turbulence.

  COLOR PALETTES
  Choose a palette from the settings page:
  • Water — blue to cyan to white
  • Fire — red to orange to yellow to white
  • Acid — deep green to chartreuse to white
  • Rainbow — full spectrum, mapped to fluid density

  Color watches use ordered (Bayer) dithering for smooth gradients; black-and-white models render in four-level grayscale. The simulation runs on all Pebble platforms, with touch input on models that have a touchscreen.