3 ms·
Alternatively, I learned in fluid dynamics that there's a gradient of velocity of the water circulating through any pipe; closer to the walls/floor it's speed i
by franciscop 5y ago
Alternatively, I learned in fluid dynamics that there's a gradient of velocity of the water circulating through any pipe; closer to the walls/floor it's speed is effectively 0, closer to the center it's at the maximum speed (in an ideal pipe/laminar fluid, that is barring turbulences/rocks/etc). In the real world there's definitely pockets of water within the river were the water speed is insignificant/still.
https://accendoreliability.com/fluid-flows-pipes/ https://accendoreliability.com/fluid-flows-pipes/
https://en.wikipedia.org/wiki/Laminar_flow https://en.wikipedia.org/wiki/Laminar_flow
- steve_adams_86 5y agoThat’s a great observation too. I wonder if areas like these would cause fish to congregate, which might explain why animals like minks can readily find fish under the ice. There’s so much I don’t know, haha.
- munificent 5y ago> I wonder if areas like these would cause fish to congregate Any fisherman, especially one who fishes rivers, has a wealth of intuitive understanding of what kinds of water features lead to greater concentrations of fish and indeed a lot of it has to do with depth and turbulence. You'll often hear them talking about whether a patch of water looks "fishy" or not, and that often has to do with how still or turbulent the surface is (along with many other factors).
- steve_adams_86 5y agoIncidentally I grew up fly fishing and that’s something I (hopefully) know a bit about! I’m just not sure about winter, under the ice. I’ve never fished an icy river (or an icy anything, come to think of it).