Supercooled water
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The liquid water in droplets can be in form of drop, droplet, hail or snow flake.
The significant factor in the atmospheric icing is super cooling of the water droplets, which means that temperature of droplets in the clouds or air is subzero. It is widely accepted that the freezing temperature of the bulk water is 0 °C. Supercooled water droplets are in metastable state, which means that they are thermodynamically unstable and can easily change their state from liquid water to solid state i.e. ice.
References
- ↑ C. Antonini, Superhydrophobicity as a strategy against icing: Analysis of the water/surface dynamic interaction for icing mitigation. Università degli studi di Bergamo, 2011, 238 p. Available:https://aisberg.unibg.it/bitstream/10446/881/1/phd_thesis_Antonini.pdf