But what is vorticity?

The vortex-ness of a fluid. Kind of. Fluid simulations made using this code base: https://anvaka.github.io/fieldplay/?c... Timestamps: 0:00 Background 0:36 What is a fluid's velocity? 2:09 What is vorticity? 3:44 Example 1 - A spinny fluid 8:58 Example 2 - Shear flow 10:33 Vorticity is not vortex-ness 11:26 Atmospheric vorticity