Freezing singularities in water drops

  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},
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

Figures from this paper

Universality of tip singularity formation in freezing water drops.
It is found that the cone angle is independent of substrate temperature and wetting angle, suggesting a universal, self-similar mechanism that does not depend on the rate of solidification. Expand
Conical shape of frozen water droplets
When a small water droplet is deposited on a cold surface, the freezing process transforms the droplet so that its upper portion attains a conical shape. Such a transformation occurs because theExpand
Theory and experiments on the ice-water front propagation in droplets freezing on a subzero surface
An approximate theory is presented describing the propagation of the ice-water front that develops in droplets of water that are deposited on a planar surface at a temperature below the melting pointExpand
Numerical simulation of the freezing process of a water drop attached to a cold plate
This paper presents a direct numerical work on the freezing process of a water drop that is either sessile on or pendant from a cold plate. The numerical technique used is an axisymmetricExpand
Experimental study of the internal flow in freezing water droplets on a cold surface
The study of a freezing droplet is interesting in areas, where the understanding of build up of ice is important, for example, on wind turbines, airplane wings and roads. In this work, the mainExpand
A comprehensive model for predicting droplet freezing features on a cold substrate
Water droplet freezing affects many aspects of our daily lives, although there is no comprehensive model which retrieves all of the experimentally observed features when a liquid water dropletExpand
An experimental study of freezing of supercooled water droplet on solid surface
Results of experimental investigations of the freezing of immobile water droplet on an aluminum plate are presented. The process was studied with the aid of a high-speed photo camera. The freezing ofExpand
Experimental and numerical study on the impact and freezing process of a water droplet on a cold surface
Abstract Ice accretion on cold solid surfaces presents hazards to a broad range of applications. It is quite essential to understand the dynamic and freezing mechanism of water droplets on a coldExpand
Freezing and melting of a sessile water droplet on a horizontal cold plate
Abstract Water droplet freezing phenomena widely exist in the fields of aerospace, power, meteorology and refrigeration. In this research, the freezing and melting processes of a sessile waterExpand
Shape variation and unique tip formation of a sessile water droplet during freezing
Abstract Theoretical and experimental investigations are conducted to study the freezing process of a sessile water droplet. A novel model that considers the effects of both supercooling and gravityExpand


Pointy ice-drops: How water freezes into a singular shape
A water drop that is gently deposited on a very cold surface freezes into a pointy ice-drop with a very sharp tip. The formation of this singular shape originates from the reduction of mass densityExpand
The case for a dynamic contact angle in containerless solidification
Containerless solidification, in which the melt is confined by its own surface tension, is an important technique by which very pure materials can be produced. The form of the solidified product isExpand
Capillary flow as the cause of ring stains from dried liquid drops
When a spilled drop of coffee dries on a solid surface, it leaves a dense, ring-like deposit along the perimeter (Fig. 1a). The coffee—initially dispersed over the entire drop—becomes concentratedExpand
Boundary-integral simulations of containerless solidification
We carry out boundary-integral simulations of a two-dimensional liquid droplet surrounded by air and solidified from a cool point on the boundary. There are three interfaces in the problem:Expand
Tasting edge effects
We show that the baking of potato wedges constitutes a crunchy example of edge effects, which are usually demonstrated in electrostatics. A simple model of the diffusive transport of water vaporExpand