5 ms·

Extruding Ice from Steel Fences and Pipes with Diurnal Freeze/Thaw (2008)

261 points by yosamino 6y ago

swimfar 6y ago
Pretty cool. I don't ever remember seeing this occur anywhere. More examples of this occurring in nature on his main page: http://my.ilstu.edu/~jrcarter/ice/diurnal/ http://my.ilstu.edu/~jrcarter/ice/diurnal/
- fiftyacorn 6y ago
  Yeah I seen the on a BBC winter watch program. The trees needed a fungus for it to happen in the UK
- dmckeon 6y ago
  Similar growth patterns occur in calcite https://en.wikipedia.org/wiki/Helictite https://en.wikipedia.org/wiki/Helictite but the effort of reproducing and documenting with water ice is impressive, and much more reproducible.
zhouyisu 6y ago
3D printing for water(ice)?
grogenaut 6y ago
Wondering if you could make winter ice fountain sculptures out of this phenomenon
djtriptych 6y ago
anybody have a line on time-lapse video of this phenomenon?
- marcodiego 6y ago
  Yes: https://www.youtube.com/watch?v=nbiEfr5FxEA https://www.youtube.com/watch?v=nbiEfr5FxEA
ehwhyreally 6y ago
I wonder what would happen if you threw some motion on the pole. Make it spin around and see what patterns you get
mc32 6y ago
Somewhat related is needle ice[1] and ice wool. Temp and humidity differences cause curious ice formations. [1] https://en.m.wikipedia.org/wiki/Needle_ice https://en.m.wikipedia.org/wiki/Needle_ice
- praptak 6y ago
  Ice wool needs a specific fungus as a catalyst to grow: https://en.wikipedia.org/wiki/Hair_ice https://en.wikipedia.org/wiki/Hair_ice
pablobaz 6y ago
Reminds me of "ice jacking" that was blamed when a ski lift collapsed in Whistler. https://www.piquenewsmagazine.com/whistler-news/ice-jacking-blamed-for-gondola-tower-collapse-2481065 https://www.piquenewsmagazine.com/whistler-news/ice-jacking-...
marcodiego 6y ago
Exotic beautiful cold desserts, anyone?
pontifier 6y ago
To me this seems straightforward. The expanding ice forces water to flow slowly out any region it can due to hydraulic pressure (no mystery here). At cold temperatures the water flowing through a crack freezes, taking the shape of the hole it came out(again, no mystery here). While it's beautiful, I'm not sure how this is news.
- s1artibartfast 6y ago
  The author actually suggests different mechanism where not water but solid ice is pushed through the hole by the expansion behind it.
- Talanes 6y ago
  Because if purely liquid water seeps out, it will flow away. If it were cold enough to freeze it immediately, it would freeze the opening shut. There needs to be at least a slush to give enough structure to freeze onto, like an icicle.
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Grimm1 6y ago
Something similar happens in the New Jersey area around the forests (and I imagine other foresty places with cold weather) if you're hiking and you look down during some frosty days you can see ice being extruded from the ground in a way that looks like ice spaghetti. It was pretty neat the first time I saw it.
CamperBob2 6y ago
Eerily reminiscent of tin whisker formation. https://www.youtube.com/watch?v=kYlWjqb-Qvg https://www.youtube.com/watch?v=kYlWjqb-Qvg
leoh 6y ago
This would be a delicious form of ice cream
ketamine__ 6y ago
A time lapse would be awesome!
tnvaught 6y ago
This is reminiscent of these plants: http://www.greatstems.com/2013/12/beautiful-ice-sculptures-of-frostweed.html http://www.greatstems.com/2013/12/beautiful-ice-sculptures-o...
ohiovr 6y ago
Would be fun to try this with Bismuth.

261 points by yosamino 6y ago

Pretty cool. I don't ever remember seeing this occur anywhere. More examples of this occurring in nature on his main page: http://my.ilstu.edu/~jrcarter/ice/diurnal/ http://my.ilstu.edu/~jrcarter/ice/diurnal/

fiftyacorn 6y ago
Yeah I seen the on a BBC winter watch program. The trees needed a fungus for it to happen in the UK
dmckeon 6y ago
Similar growth patterns occur in calcite https://en.wikipedia.org/wiki/Helictite https://en.wikipedia.org/wiki/Helictite but the effort of reproducing and documenting with water ice is impressive, and much more reproducible.

zhouyisu 6y ago

3D printing for water(ice)?

grogenaut 6y ago

Wondering if you could make winter ice fountain sculptures out of this phenomenon

djtriptych 6y ago

anybody have a line on time-lapse video of this phenomenon?

marcodiego 6y ago
Yes: https://www.youtube.com/watch?v=nbiEfr5FxEA https://www.youtube.com/watch?v=nbiEfr5FxEA

ehwhyreally 6y ago

I wonder what would happen if you threw some motion on the pole. Make it spin around and see what patterns you get

mc32 6y ago

Somewhat related is needle ice[1] and ice wool. Temp and humidity differences cause curious ice formations. [1] https://en.m.wikipedia.org/wiki/Needle_ice https://en.m.wikipedia.org/wiki/Needle_ice

praptak 6y ago
Ice wool needs a specific fungus as a catalyst to grow: https://en.wikipedia.org/wiki/Hair_ice https://en.wikipedia.org/wiki/Hair_ice

pablobaz 6y ago

Reminds me of "ice jacking" that was blamed when a ski lift collapsed in Whistler. https://www.piquenewsmagazine.com/whistler-news/ice-jacking-blamed-for-gondola-tower-collapse-2481065 https://www.piquenewsmagazine.com/whistler-news/ice-jacking-...

marcodiego 6y ago

Exotic beautiful cold desserts, anyone?

pontifier 6y ago

To me this seems straightforward. The expanding ice forces water to flow slowly out any region it can due to hydraulic pressure (no mystery here). At cold temperatures the water flowing through a crack freezes, taking the shape of the hole it came out(again, no mystery here). While it's beautiful, I'm not sure how this is news.

s1artibartfast 6y ago
The author actually suggests different mechanism where not water but solid ice is pushed through the hole by the expansion behind it.
Talanes 6y ago
Because if purely liquid water seeps out, it will flow away. If it were cold enough to freeze it immediately, it would freeze the opening shut. There needs to be at least a slush to give enough structure to freeze onto, like an icicle.

deleted 6y ago

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deleted 6y ago

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Grimm1 6y ago

Something similar happens in the New Jersey area around the forests (and I imagine other foresty places with cold weather) if you're hiking and you look down during some frosty days you can see ice being extruded from the ground in a way that looks like ice spaghetti. It was pretty neat the first time I saw it.

CamperBob2 6y ago

Eerily reminiscent of tin whisker formation. https://www.youtube.com/watch?v=kYlWjqb-Qvg https://www.youtube.com/watch?v=kYlWjqb-Qvg

leoh 6y ago

This would be a delicious form of ice cream

ketamine__ 6y ago

A time lapse would be awesome!

tnvaught 6y ago

This is reminiscent of these plants: http://www.greatstems.com/2013/12/beautiful-ice-sculptures-of-frostweed.html http://www.greatstems.com/2013/12/beautiful-ice-sculptures-o...

ohiovr 6y ago

Would be fun to try this with Bismuth.