Am I assuming correctly that we’re looking at a big succ-situation, where the diver will big forced through the tube no matter what?
It’s a difference of like 7 psi over an area of what looks like maybe 30 square inches, which would be uncomfortable to get caught in, but I don’t think you’re getting Byford Dolphined
Ahhh yeah that’s where I’ve heard it before, WTYP had an episode on that!
from a different reply I understood the meaning of the last two words: https://en.m.wikipedia.org/wiki/Byford_Dolphin
Is 5m enough for that? I feel like no, but i have no idea.
This unfortunately happened in real life.
Edit: other way around though. The divers were on the air side (habitable quarters) of the chamber.
For more clarification, they were on the high pressure air side. The kind of dives they were doing involved long periods of acclimation to the different pressures involved, so the diving bell was pressurized to 9 atmospheres. Someone fucked up, and the door opened. 9 atmospheres turned into 1 atmosphere very quickly, and the only good thing is that it happened so fast that the deceased wouldn’t have even noticed
If you want to see an episode of a podcast about engineering disasters which is itself, ironically, an engineering disaster, well there’s your problem
No one fucked up, they finally settled on it being a mechanical failure.
Edit: the company and government fucked up, I meant to imply none of the divers fucked up.
The company fucked up by not updating their equipment, even though they knew it was outdated and dangerous
“The North Sea Divers Alliance, formed by early North Sea divers and the relatives of those killed, continued to press for further investigation and, in February 2008, obtained a report that indicated the real cause was faulty equipment. Clare Lucas, daughter of Roy Lucas, said: “I would go so far as to say that the Norwegian Government murdered my father because they knew that they were diving with an unsafe decompression chamber.”[11] The families of the divers eventually received compensation for the damages from the Norwegian government, 26 years after the incident.[12]”
The company fucked up, they did not maintain their equipment.
Some parts of that article are straight horror.
👋 not reading it
The families of the divers eventually received compensation for the damages from the Norwegian government, 26 years after the incident.
Well, it’s good that some justice was finally achieved, but that is depressing level of covering up (as usual)
But where’s Saddam?
anon’s in trouble because they’re using psi instead of bar.
Edit: also fuck high pressures are a scary thing.
Pascal FTW.
Think you mean mmHg
We have mmHg at home (feet water)
He is so dreamy
This really Byfords my Dolphin
I’m unfamiliar with fluid dynamics. How intense would the Delta p problem be in this situation?
Soup like homogenate
I feel like a delta of less than 10 psi doesn’t sound so bad
It depends on the size of the opening. If it’s small that’s no problem. You could block a 1 inch pipe at 10psi with your bare hand and be largely fine. It’s a little less than 10 pounds of force assuming a round opening.
The problem is that the total force scales geometrically with the size of the opening. Make it two feet wide at the same 10psi and now you’ve got about 4500 pounds of force trying to push you though that opening should you find yourself in the unfortunate situation that it’s been completely blocked by your body.
Yeah fair play to the big opening issue, I was picturing 1-20cm holes
Yeah, the rendering shows it to be about the height of a foot. So probably not too bad.
Yes. As long as the pressure is not enough to put a hole in you, you just need to care about the force.
Big succ P
Do NOT put your dick or butthole there
Well if you have both, and disregard this warning, it will be hard to separate the two
DELTA P 🗣️🗣️
Wtf is a psi
Muricas version of pressure.
It would kill you regardless of where you live
pounds per square inch. the us version of bar or n/m²
Why is your comment highlighted blue in Lemmy Connect?
It’s what you need to power your Protoss army
100.000 PSI is equal to 1 bar(if I remember correctly)
That’s metric
no, not at all. bar is a logical metric unit, psi is imperial. because the us doesn’t know what powers of 10 are, there’s never a nice conversion factor.
US uses both and is capable of conversion. It is unfortunate, but saying it doesn’t know powers of ten is pretty condescending.
I said (or at least meant) that imperial doesn’t use powers of ten like metrkc
Word. “The us doesn’t know what powers of 10 are” just didn’t convey that clearly.
We’re stuck with this shit for now, and one of the few positive things is that it forces you to understand both the conversions and power of 10 is cake compared to understanding both and converting.
Water go sluuuurp, human go squish.
Wouldn’t this human in theory become a crumpled sausage like what happened to the crab by the leaking underwater pipe?
Not 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
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.
Size of the hole absolutely matters. If it’s only the size of a fist (10cm x 10cm) then instead of 5 metric tons it’s only 50 kg of equivalent weight, or about the weight of a person and easily survivable.
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.
Reference: https://www.youtube.com/watch?v=_-INIu_VK08
https://en.m.wikipedia.org/wiki/Byford_Dolphin#Diving_bell_accident
Fuck all of this
They also alleged the accident was due to a lack of proper equipment, including clamping mechanisms equipped with interlocking mechanisms (which would be impossible to open while the chamber system was still under pressure), outboard pressure gauges, and a safe communication system, all of which had been held back because of dispensations by the Norwegian Petroleum Directorate.
Fatigue may also have taken its toll on the crew, who had been working for longer than 12 hours
Builder of the rig Aker ASA’s Gross Profit was 7.16B
Norway’s oil and gas tax revenue soars to record $89 bln
Imagine forcing your workers into more than 12h shifts, running on 30 year old equipment, the government straight up refusing to upgrade said equipment, while making billions in profits - they don’t call it gross profit for no reason…
Fuck all of this
Normally when people say this it is at least a bit of an exageration, but not in this case. That is some straight up nightmare fuel.
Heres a taster for those of you who don’t want to read the whole thing.
…bisection of his thoracoabdominal cavity, which resulted in fragmentation of his body, followed by expulsion of all of the internal organs of his chest and abdomen…
The wildest part to me is someone having the last name Coward. The only way that surname makes sense is if it was changed from something worse like Kiddiddler.
Yeah I read about it. Definitely not the nicest way to go.
Safety video for anyone with an interest: https://www.youtube.com/watch?v=AEtbFm_CjE0 Delta P is stuff of nightmares.
Danger Zone!
Top 10 ∆P incidents
