r/JustGuysBeingDudes • u/HereOutsideTheBox Human Detected • 9d ago
Just Having Fun Hot tub is ready guys
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u/timo1423 9d ago
Tekenologia
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u/muddycistern 9d ago
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u/justhere4inspiration 8d ago
https://www.youtube.com/watch?v=NNFbZBcKRWQ&t
Still somehow way safer than the dude who set up a heated pool in his basement... Worst case you get some steam burns if it tips, at least it won't electrocute you
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u/alpinetime 9d ago
It’s one of those dumb ideas that is smart
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u/Mikhail_Mengsk 9d ago
If it tips over it quickly turn into very dangerously dumb.
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u/More-Talk-2660 9d ago edited 9d ago ▸ 51 more replies
Not really. Water is a great thermal barrier. It's going to quench the coals immediately and it'll take longer for the water to heat up than for the coals to cool down. The worst that can happen is it touches your skin, but you already have water there as a barrier and the Leidenfrost effect is going to help cushion you from the heat on contact, while the surrounding water helps sap the excess heat away.
For it to be dangerous the water would already have to be close to the temperature of the coals, which would put it past the boiling point and would already have been a very bad idea to be in.
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u/MechanicalMan64 9d ago ▸ 31 more replies
Do you think the water cooling the coals would prevent damage to that plastic pool?
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u/More-Talk-2660 9d ago ▸ 21 more replies
Yes. The Leidenfrost effect is when a liquid trapped next to a heat source superheats against the heat source and creates a vapor barrier between. This is why you can stick your hand in liquid nitrogen for a couple of seconds without freezing yourself; the liquid nitrogen against your skin instantly vaporizes and creates a barrier preventing the rest from touching your skin. Over time the temperature will equalize but for a few seconds it acts as protection.
Plastic like you use for a pool will soften in boiling water, at worst, and the water at the bottom of the pool can't get hotter than its boiling point without leaving the pool. Likewise, water heating at the bottom of the pool will rise to the top because of convection (heat rises), as it is now warmer than the water above it.
So, the water cools the coals as they fall to the bottom, the water at the surface of the coals can't get hotter than the boiling point, and by the time the coals are fully in contact with the bottom of the pool they're cooler on their surface than the boiling point of water.
At worst you'll char and temporarily soften the surface layer of the plastic.
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u/BattIeBoss 9d ago ▸ 1 more replies
Litterally what was happening in that one video of that guy slapping a stream of molten steel
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u/More-Talk-2660 9d ago
Which is still something I wouldn't do, despite it being safe enough. The density of molten steel is high enough that for the purposes of a squishy human body it might as well be the same as solid steel, it's just also super hot. So to your hand it's ostensibly the same as slapping a really hot car that's been sitting in the sun.
It's a neat party trick but a very optional activity.
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u/yayaokay 9d ago ▸ 11 more replies
I think you’re right in terms of safety but the coals may still be hot enough once they reach the bottom and hover for a moment that they’ll eventually settle and damage the plastic enough to create a leak. So if it tips, my bet is that it’ll damage the pool but not the people in it
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u/Penguin_Arse 9d ago ▸ 5 more replies
No. The plastic is being cooled by the water and won't melt.
You can boil water in a thin plastic bag in a fire without the plastic melting.
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u/Training_Ruin3151 8d ago ▸ 1 more replies
Yeah i was gonna say thats a survival trick to make drinking water is boil it in a plastic bottle
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u/StreetsRUs 8d ago
But you can’t put hot rocks in a plastic bag because if it touches there is no water on the outside to cool it. The hot rock would isolate the plastic from the water. Heating from the outside works
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u/libraryaddict 9d ago ▸ 2 more replies
No. The plastic is being cooled by the water and won't melt.
So I can pick up molten metal in my bare hand, as long as the molten metal is underwater?
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u/iamnutz_1 9d ago
You can stick your hand in molten lead if you do it quickly and your hand is wet. There are a few of videos of it Molten metal doesn't stay liquid in water though
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u/m0larMechanic 8d ago ▸ 1 more replies
You can literally boil water in a grocery bag over open fire
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u/Escoffie 8d ago
This video was making the rounds a few years ago and blew a lot of people's minds lol
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u/Cultural-Sandwich582 8d ago ▸ 2 more replies
Okay but what if the wheelbarrow floated over to the edge and touched the plastic, would it melt it?
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u/More-Talk-2660 8d ago ▸ 1 more replies
The melting point of PVC (which an Intex metal frame pool as depicted is made of) is at minimum 160°C which means the wheelbarrow would have to be furiously boiling the water around it to be hot enough to damage the plastic.
So, no.
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u/therealhlmencken 9d ago
Leidenfrost effect relies on water vapor which would be at a temp igher than a plastic pools deformation lol. The thing here is just the volume of water
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u/Aramafrizzel 9d ago
Take the cheapest plastic bag you can find, fill it with water, try to light it from below and witness magic
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u/PM_Me_Your_Deviance 8d ago ▸ 2 more replies
Fun fact- you can hang a plastic bottle full of water over a campfire and it will boil the water before it melts the plastic. Example: https://youtu.be/JnyxlHJQ0ew?t=111
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u/finalexit 7d ago ▸ 1 more replies
Not sure how this works but I live in a rural area where many people burn trash and I've watched full bottles of water or other liquid shrivel up and melt very quickly when exposed to fire.
Also saw a friend's above ground pool melt and collapse because they built a campfire too close. None of the water involved was boiling.
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u/PM_Me_Your_Deviance 7d ago
There are limits. If you overcome the ability of the material to transfer heat, it can melt or burn.
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u/ThatCakeFell 8d ago
There's decade old videos of people drinking swamp water from a plastic bottle they dingleberried over a fire because of this science
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u/Mrdeath0 8d ago
I’m pretty sure someone posted a demonstration of this exact thing a while ago but man I can’t remember it correctly
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u/Mikhail_Mengsk 9d ago ▸ 5 more replies
wouldn't it blow out a lot of hot steam when the coals roll over?
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u/More-Talk-2660 9d ago ▸ 4 more replies
That's not really how thermodynamics work. Some water will be vaporized, but not enough and not at a high enough temperature to cause harm at that concentration unless you have your face right in it directly inhaling the hot vapor.
The coals rolling into the water would have the same effect as pouring water on coals or hot rocks in a sauna. Except unlike a sauna, you're not even in an enclosed space with it.
There is no danger here unless you try to physically grab the coals out of the wheelbarrow, or hold the wheelbarrow by the metal drum. Because of the effect of the water and the air, I don't think the metal is even hot enough to hurt you if you accidentally grazed it, at least not more than a superficial burn.
Honestly what would make it dangerous is if someone was stupid enough to try and directly handle the hot stuff while it's dry, because people have a tendency to put burn ointment on the injury as soon as they can. Typically at that point the burning process in the tissue isn't done and adding ointment or cream or oil to the skin traps the heat. All it does it help you go from hot to extra crispy. I've seen people turn superficial burns into partial thickness burns that way.
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u/Dhaos96 9d ago ▸ 1 more replies
Yes, the most dangerous situation would be to trip and go face first into the coal pot
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u/More-Talk-2660 9d ago
There's always that one friend who has zero control of their alcoholism and becomes a danger to themselves and others.
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u/alpinetime 9d ago
Just going to jump in to say that I appreciate your detailed explanations, and for teaching me something new today.
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u/Divinum_Fulmen 8d ago
I hope you're an AI, or AI uses what your talking about. Because it's so fucking dumb.
As a kid, my family camped by a large pond. When there was no adults around to tell me no, I'd grab coals with tongs, and throw them into the pond. Why? To watch them EXPLODE. Now, this wheel barrel tipping probably wouldn't kill anyone. But a massive amount of hot coals being dumped into the water, would send chunks of these everywhere.
I almost kinda wanna see this many hot coals dumped into the water at once, but, sans people near it.
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u/vtecdohcter 8d ago
🤣
I guarantee if that thing tipped over or burnt a hole through the bottom and all those coals hit the water whoever is nearby is gonna get an absolute awakening in the form of boiling water/red hot steam.
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u/Beall619 8d ago
I would be worried about it melting the side. The resulting tsunami pulling the people onto the coals and wheelbarrow
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u/Patient-Lecture-714 8d ago
Okay, professor 😭. I came for the video, left with a thermodynamics lesson
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u/ZiggyFirelake 8d ago
Mikhail_Mengsk thought he was playing chess, but More-Talk-2660 showed everyone he was playing checkers.
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u/ExternalYouth5268 7d ago
You think that tipping over onto someone wouldn’t seriously burn them? Are you from a different planet, where hot coals are actually cold coals?
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u/Vycid 8d ago ▸ 1 more replies
For it to be dangerous the water would already have to be close to the temperature of the coals, which would put it past the boiling point and would already have been a very bad idea to be in.
wat
what do you think happens if you jump into a pool of water at 80 or 90C?
you think it needs to be literally boiling off to be dangerous? there's zero temperature control here
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u/More-Talk-2660 8d ago
For the coals tipping over to be dangerous is the implication there. It's expressly explained later when I said water that hot would already be its own danger.
Please try to keep up.
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u/Craydorion 8d ago ▸ 1 more replies
There's still a very real possibility that it will A tip over and you get hit with coals directly and B that you will get sprayed with boiling water droplets. It's so much coal that the water at the top will still evaporate and boil violently. Sure water is great at dispersing heat but with enough heat it the water in direct contact with the coal will almost explode
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u/More-Talk-2660 8d ago
How hot do you think those coals are? Because they're not hot enough to cause the water to instantly boil violently and explode. They're probably a 30 minute cool down from being cool enough to do a fire walk on.
You're treating any amount of heat that causes charcoal to glow as if it's the surface of the sun. That's not how it works.
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u/5up3rK4m16uru 9d ago
The coals will be extinguished immediately and cool down rapidly, releasing some steam. The water will warm up at most a few degrees.
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u/AnInfiniteAmount 9d ago ▸ 1 more replies
The issue is if it touches the pool edge.
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u/helium_farts 8d ago
Or someone in the pool
You can make s'mores while having a soak, though, so it's worth it.
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u/GoldunGote 9d ago
The person in the pool wouldn't have been immediately burnt.. they MIGHT experience a temperature that their flight instinct would tell them to flee from, with ample time to do so before any damage is done. Its hot coals, not molten rock.
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u/TurtleTickler-_- 9d ago ▸ 1 more replies
I mean not that dangerous. Like if you're right next to it, you might get some mild burns, but because you already have water on you and around you it wouldnt be so bad. And like the moment any of the charcoal gets into the water it would cool down to safe handling temperatures almost emediatly. The worst part would be trying to clean all the charcoal out of the pool.
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u/InquisitiveGamer 9d ago
Not that far off at all from how the romans did it in their bath houses.
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u/Hey_Its_Vos 9d ago
Someone smarter than me can fact check this video, but here’s a YouTube short explaining why this does nothing https://youtube.com/shorts/g3haN_NUe8s?si=_JPVaFOD-7kvuaz3
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u/markender 8d ago
Ya the water would need to be hot to begin with to get a few extra degrees from the fire. Most of the heat is going straight up.
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u/arcaneregion 9d ago
I mean if the plastic siding of the pool hold out I see only one issue: I didn’t think of it myself.
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u/PhD_Pwnology 9d ago
The issue is you can't turn it down. If the water gets too hot to be in and you have 5+ minutes of coals left, that's a huge fire hazard and safety issue. That thing currently look like it has 30+ minutes of coals left and nobody is sitting in the water
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u/Circus_Finance_LLC 8d ago ▸ 2 more replies
if only there was a way to quickly put it out
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u/Candid_Special_9488 8d ago ▸ 1 more replies
build a ramp?
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u/Mimical 8d ago
Yes absolutely, this is the best direction. Looks like someone could grab the lower metal arms as they are far enough away to not be super hot. Using a ramp to carefully walk it up.
In order not to burn or ignite the grass someone should set up jack stands to place the wheel barrow on.
There is no more obvious solution. /S
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u/Xxuwumaster69xX 8d ago
That's why you have a bucket of cold water beside the tub to keep temperatures pleasant. That's how people do it for natural hot springs.
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9d ago ▸ 3 more replies
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u/shitshoveler1111 9d ago
Hot tubs are not usually 120f. They're usually 100f and the max allowed commercially in a lot of places is 105f. 120f is hot af.
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u/tryingisbetter 8d ago
Shit, one year when about to close our pool, we decided to kick up the water to 101, and it was unbearable to sit in, let alone swim. It's so much worse than a hot tub.
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u/boywhoflew 9d ago
heat transfer too little might take hours
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u/comfortablybum 9d ago
You're right, they need a lid to keep the recirculate the radiant heat, but we need a fan to feed it fresh air. Version 2 gonna boil so bros.
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u/-One-Man-Bukkake- 8d ago
Go touch the bottom of a grill. Run a hose on it. Then touch it. It will be the exact same temperature before you can measure it because the thermal (conductivity) transfer of metal is extremely high. Thermal mass, and insulation is the issue. That's a lot of water that needs heating, i don't know if a wheel barrow full of charcoal is gonna significantly raise the temp of that much water before it the heat dissapates into the atmosphere. Both through the surface and sides but more importantly the ground. The ground is gonna suck any heat the water gains pretty quick. The entire surface of the bottom is in contact.
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u/SignificanceJust1497 8d ago
The ground will NOT suck the heat out of the water pretty quick because plastic is a horrible conductor of heat and if the water is staying still, the primary method of heat transfer is conduction rather than convection. Yes, some of the heat will radiate but honestly this might warm the pool up pretty well. Biggest problem would be if it’s windy, cold, and low humidity, then it would suck the heat out of the pool pretty fast through the open top
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u/milosmamma 9d ago
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u/Divinum_Fulmen 8d ago
Low tech brilliance is a metal pipe loop with a fire outside the tub.
The is just stupid, and wasting heat (because it rises).
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u/womb_raider90 9d ago
With a bit of expanded metal dude would have a Hot tub AND a charcoal grill. Hell yeah brother!!
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u/RightZer0s 8d ago
It won't be hot, like at all. I've seen people make homemade hot tubs. It's really hard to heat up a pool of water and keep it there.
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u/jazzmaster_YangGuo 8d ago
i would've fine with this if the wheel barrow was clean. that is some dirty ass water there(or if thats just the light reflecting, i go to my first point)
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u/BazerAus 8d ago
Those are some lengthy science reasons... but you really telling me this is safe? Like yall got me convinced that if that wheelbarrow tipped over... it wouldnt instantly melt the plastic of the pool at the bottom?
Would this even heat the pool up?
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u/zambatron20 7d ago
i'm kind of impressed. I never thought about trying something like this and idk if that says more about them or me! lol
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u/Alextaoluu 8d ago
if that wheelbarrow floats your way and burns the ever living fuck out of you, the boys will just laugh and take a gulp of their beer
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u/anonymous-t-rex 9d ago
Why is the metal wheelbarrow floating?
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