double 🧪🧪

single 🧪

The Surf Lab just had our belated holiday party, which was a well timed jolt of fun and curiosity. We built a glider, ate pizza, and watched "Wind".

vorticity distribution for 2d flow on a non-rotating (left) and rotating sphere (right). curvature and rotation arrest the inverse cascade and leads to zonal jet patterns. but, the stat mech predictions are the same: the energy (eventually) ends up in the lowest available mode in both cases. 🌊🧪

Not the ocean, but this setup is still at SIO if you are going to do demos.

vorticity distribution of 2d flow on a non-rotating sphere 🧪🌊

The curve assumed by a perfectly elastic rod subject to longitudinal thrust is known as an elastica. Maxwell showed it's also the curve followed by particles near a uniformly translating cylinder (here I show the periodic extension).

Here's something that hasn't been fully explained that Longuet-Higgins wrote about in the 70s and 80s. The barrel of a breaking wave takes an approximately trochoidal shape. 🌊