Freezing singularities in water drops

@article{Enrquez2012FreezingSI,
  title={Freezing singularities in water drops},
  author={Oscar R. Enr{\'i}quez and Alvaro Marin and Koen G. Winkels and Jacco H. Snoeijer},
  journal={Physics of Fluids},
  year={2012},
  volume={24},
  pages={091102}
}
In this fluid dynamics video we show how a drop of water freezes into a singular shape when deposited on a cold surface. The process of solidification can be observed very clearly due to the change in refraction when water turns into ice. The drop remains approximately spherical during most of the process, with a freezing front moving upwards and smoothly following the interface. However, at the final stage of freezing, when the last cap of liquid turns into ice, a singular tip develops… Expand

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