Fluid experiment
Undertow
Drag through the dye. Watch the flow pull it apart.
Starting the flow...
Incompressible flowDrag to stir
Resolution and seed take effect on Restart. The fluid domain is a periodic rectangle, 2 by 1 in dimensionless units. The display fits it to the canvas.
Measurements are preparing.
The curls come from a two-dimensional fluid. A steady drive feeds its motion; pressure keeps it from compressing. Dye moves with that flow, stretching into thin ribbons as neighboring patches take different paths. Dragging pushes the fluid and adds more dye.
This is a fluid experiment in dimensionless units. The colors show which dye dominates locally, with contrast added to separate mixed patches. Lighting makes the edges easier to see.
Sources and implementation
- Harris, Fast Fluid Dynamics Simulation on the GPU. Advection and pressure projection.
- Selle and collaborators, An Unconditionally Stable MacCormack Method. Dye transport with an error correction and a limiter.
- Equations, numerical checks and rendering conventions.