Why Your Pee Looks Like A Chain

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Have you noticed the shape of your urine stream when you pee? It does this twisty undulating thing. But why? And why do the same waves appear when you pour a liquid from a container?

Here's my video featuring Rayleigh instability:


Here's my video about the Lattice Boltzmann Method:


The fake medical advice at the end comes courtesy of not-fake Doctor Rohin Francis. This is his excellent channel:


Here are a couple of good videos on laminar flow:



Image and video credits:
The video of water floating in microgravity is by NASA
The Lattice Boltzmann animation is by Richard Sear

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