Yeah I read the entire Wikipedia entry on the Byford Dolphin and I almost threw up because how vivid the description is. I think this would be my third time saying this but that’s not a nice way to go (to die) at all.
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starman2112@sh.itjust.works 3 months agoNot at 15 feet. I don’t know enough to say how fast the water would be leaving that hole, but it’s maybe a couple hundred pounds of pressure. If he even got caught, it would be super uncomfortable, but he ain’t about to get ∆p’d
If you wanna see a real crab-in-a-pipe situation, look up that Byford Dolphin everyone’s talking about
spiritsong@lemmy.world 3 months ago
victorz@lemmy.world 3 months ago
You weren’t kidding. Real horror movie shit.
Dasus@lemmy.world 3 months ago
You aren’t kidding that they weren’t kidding. I genuinely felt a bit of a ping of nausea and had to mentally distance myself a bit from imagining it too vividly.
victorz@lemmy.world 3 months ago
I hope you’ll be able to forget, bud. ❤️
SynopsisTantilize@lemm.ee 3 months ago
Reference: www.youtube.com/watch?v=_-INIu_VK08
anindefinitearticle@sh.itjust.works 3 months ago
Let’s convert to metric so we can tell.
15 ft is about 5 m.
Water pressure increases by 10,000 pa per meter (rhogh, rho=1000 kg/m^3, g~10m/s^2), so total pressure is 50 kpa, or 1/2 earth atmospheric pressure.
One side of that hole has ambient pressure of 1 atm. The other side has that plus water pressure totalling 1.5 atm.
A pressure is just an energy density. Multiply by the cross-sectional area of the interface to get the energy gradient across the interface. An energy gradient is a force. We don’t have a measure of the cross-sectional area of the hole, but if we expect a person to fit through let’s call it 1m^2.
50 kpa = 50 kJ/m^3, so total force felt across this opening is 50kN which is the equivalent weight of five metric tons.
I’d say this person is going to have a bad time with five metric tons pushing them towards that little hole.
UltraGiGaGigantic@lemmy.ml 3 months ago
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victorz@lemmy.world 3 months ago
This is very interesting. I like unit conversions.
What I did was just take 21-14 psi, and then converted that to bar or atm. I got a number close to ½.
I was like, half an atm? Can’t be that bad? I can handle 1 full mf atm literally all mf day mf.
But I guess that’s different somehow? I just don’t understand how yet. If anyone would care to go into it with me… 🙏
weker01@sh.itjust.works 3 months ago
Remember a vacuum does not have suction it’s the air that presses things under vacuum together. One atm is actually quite a lot but we can withstand that as it’s pressing at us from all sides including inside.
See this example of how strong 1 atm can be