5 ms·
I like this way of looking at the problem, I wouldn't have thought of this! I think this relies implicitly, too, on incompressibility of the fluid, no? As wel
by benrbray 5y ago
I like this way of looking at the problem, I wouldn't have thought of this! I think this relies implicitly, too, on incompressibility of the fluid, no? As well as surface tension? Otherwise, we might imagine the fluid having less density at the bottom, while occupying a circular cross-section of the same area.
- leephillips 5y agoIt does rely on incompressibility, but, to this order, does not include surface tension. The water faucet puzzle that interested me as a student was after the water had reached the sink and begun to spread out radially from the stream. Have you noticed that there is a circular boundary where the layer of water suddenly changes depth?
- bradrn 5y ago> Have you noticed that there is a circular boundary where the layer of water suddenly changes depth? I stumbled upon an explanation for this a while ago: https://en.wikipedia.org/wiki/Hydraulic_jump https://en.wikipedia.org/wiki/Hydraulic_jump
- brilee 5y agogoogle "hydraulic jump" Separately, when you model surface tension, you get an equation for when a stream breaks up into droplets - https://en.wikipedia.org/wiki/Plateau%E2%80%93Rayleigh_instability https://en.wikipedia.org/wiki/Plateau%E2%80%93Rayleigh_insta...
- Lichtso 5y agoYou mean the hydraulic termination shock? Something like this: http://3.bp.blogspot.com/-ryzFfMYaEV4/TZist3z0dxI/AAAAAAAAAE4/F5gwLB6L8Ic/s1600/termination_shock.jpg http://3.bp.blogspot.com/-ryzFfMYaEV4/TZist3z0dxI/AAAAAAAAAE...
- leephillips 5y agoYup. It turns out to be more complicated than one (or than I) would think at first.