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Water expands when it freezes, in my head thermos is an extremely rigid structure, how do you stop it from rapturing?
by TrainedMonkey 3y ago
Water expands when it freezes, in my head thermos is an extremely rigid structure, how do you stop it from rapturing?
- GordonS 3y agoSimply don't fill it to the brim, allowing room for expansion.
- a_t48 3y agoThe thermos is mostly full of compressible air
- tecleandor 3y agoI think the idea is leaving it open so it freezes from the top down. From what I've read there, the trick of clear ice is directional freezing. I've seen some other ideas like freezing water in a camping cooler with its top open.
- vladvasiliu 3y agoThat's what I thought the idea was, too. But then, why aren't my ice-cubes made in the regular fridge tray clear? The same principle should apply: they should be clear at the top, where the tray is open.
- wrs 3y agoThe thermos wall is an insulator, unlike the tray.
- hollasch 3y agoIce in a tray freezes from all sides since it's not insulated. And indeed, the ice from your tray is crystal clear on the sides, with the cloudy ice at the center of the cube. In an insulated vessel, the sides and bottom remain liquid until the frozen portion grows down from the top, pushing the cloudy bit to the bottom, which you can then just lop off.
- account42 3y agoI'm not sure if your end of the world planning needs to include your thermos.
- angry_moose 3y agoOnly if its completely full. A travel thermos is ~6 inches deep and OP said to fill it to 2-3 inches.
- Swizec 3y ago> how do you stop it from rapturing? From the post you’re replying to: 2 to 3 inches of water at the bottom … expands to fill the thermos Air compresses. A lot.
- leblancfg 3y agoNot an issue. It's only partially filled, less than half-way. As it forms, the ice floats and glides up the sides until it's like, 1mm higher than where it started.
- burnished 3y agoWell you make sure it isnt baptized. But also as the ice freezes I believe it becomes more buoyant and that rigidity causes the ice to be lifted up when it exerts force on the thermos interior.
- fluxic 3y agoPun of the year.
- kcplate 3y ago[flagged]
- account42 3y agoWhere does this perception come from? HN upvotes humor all the time, the bar is just slightly higher than some other sites - which is IMHO a good thing because endless pun threads quickly become tiring.
- kcplate 3y agoI see humor downvoted all the time, with occasional lecturing of how it’s not appropriate here. Not to mention the chastising you occasionally see for not using an overt sarcasm indicator (Some folks are strangely zealous about that one).