This fluid, seemingly at rest initially, turns out to be convecting as revealed by a #timelapse movie. #Evaporation cools the fluid at the surface, which makes it a bit heavier than the fluid below, thus #convection ensues, very slowly!

This fluid is #rheoscopic, easy to make at home using shaving cream.

Here's the recipe:
https://pubs.aip.org/aip/pof/article/30/8/087103/938850/Rheoscopic-fluids-in-a-post-Kalliroscope-world

#Physics #Science #fluiddynamics #FluidMechanics

#Rheoscopic liquid

https://twitter.com/Alex_Parker/status/1590946207949783041?t=U13qNZ55L_h-kPvmPK8Frw&s=19

RT @Alex_Parker@twitter.com

Apropos of nothing, here’s a prototype for a little art project I was working on a few years back.

“Tempest in a Teapot” — magnetically-stirred mica powder in suspension in a glass teapot. https://t.co/T60K37gypP

🐦🔗: https://twitter.com/Alex_Parker/status/1590946207949783041