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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:
   • The bizarre ripples that form in a st...  

Here's my video about the Lattice Boltzmann Method:
   • The Bizarre Way We Track Fake Virus P...  

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

Here are a couple of good videos on laminar flow:
   • Why Laminar Flow is AWESOME - Smarter...  
   • Laminar Flow DISAMBIGUATION  

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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https://stevemould.com/books

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  / stevemould  

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