Wow. That's why liquid glue looks like this when you remove the things you glue. Interesting.
this post was submitted on 27 Nov 2024
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"An example of viscous fingering in a Hele-Shaw cell."
haha
Not to be confused with vicious fingering
Fluid mechanics guys are nuts, I can't believe people can write the mathematical equations that govern stuff like this, it's easily the most impressive and understated area of physics imo.
As a consequence of the incompressibility of the flow and Darcy's law, the pressure fields must be harmonic...
Every time I start to feel complacent with my ignorance of complex analysis, another harmonic function pops out of the woodwork.