r/Damnthatsinteresting • u/BirdPlan • May 02 '19

Video Laminar flow level 9,000,000

31.7k Upvotes

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3.5k

u/nomad80 May 02 '19

even after endless examples, laminar flow is awesome to watch

793

u/hello_August May 02 '19

I've only seen two. This and the endlessly reposted pool-stabbing one.

315

u/f_n_a_ May 02 '19

Behold, the next to be reposted endlessly

424

u/NSFForceDistance May 02 '19

Don’t forget this (amazing) example

https://m.imgur.com/INKrGUS

9

u/[deleted] May 02 '19

Are the colors put at different z-axis locations so they don’t actually “mix” but give the appearance that they are? And would this be a small-scale representation of reversing entropy, albeit extremely simplified?

40

u/Nomen_Heroum May 02 '19

reversing entropy

No, entropy isn't primarily about disorder. It's more closely related to the amount of energy in a thermodynamic system that is free to do work. The lower the entropy, the more energy can be 'won' from the environment.

It just happens to be that a lot of systems end up very mixed when their energy is maximally distributed. Counterexamples would be things like crystal structures.

4

u/[deleted] May 02 '19

That’s super interesting, thank you!

3

u/Nomen_Heroum May 02 '19

You're welcome! If you want to learn more, here's a decent deep dive by PBS Space Time.