Fluid Lab

stable fluids · pressure projection

Inject dye and momentum into a live velocity field, then watch vortices form, advect, and diffuse. Compare how viscosity, dye diffusion, and vorticity confinement reshape identical initial conditions.

Explore vortex pairs, buoyant plumes, jets, and cylinder wakes with dye, velocity, and vorticity measurement views. The educational incompressible model uses semi-Lagrangian advection and pressure projection.

Navier–Stokes field · 120 × 72 cells

Real-time incompressible flow

60 Hz projection

kinetic energy 0.000

mean divergence 0.000

relative Re —

drag to inject dye and momentum

Observation

Vorticity confinement preserves small eddies.

Semi-Lagrangian advection and pressure projection approximate mass-conserving flow.