Featured Research

from universities, journals, and other organizations

Freezing water droplets form sharp ice peaks

Date:
October 5, 2012
Source:
American Institute of Physics (AIP)
Summary:
Photos reveal how water droplets placed on a cold surface freeze to a sharp point that sprouts a “forest” of tree-like ice crystals.

Once the liquid is completely frozen, the sharp tip of the drop attracts water vapor in the air, much like a sharp metal lightning rod attracts electrical charges. The water vapor collects on the tip and a tree of small ice crystals starts to grow, as seen in the image.
Credit: Oscar R. Enrํquez, มlvaro G. Marํn, Koen G. Winkels, and Jacco H. Snoeijer Physics of Fluids Group, University of Twente, Enschede, The Netherlands

Researchers at the University of Twente, in the Netherlands, placed water droplets on a plate chilled to -20 degrees Celsius and captured images as a freezing front traveled up the droplet.

Related Articles


The approximately 4-millimeter diameter droplets took about 20 seconds to freeze. During the final stage of freezing, the ice drop developed a pointy tip.

The effect, which is not observed for most other liquids, arises because water expands as it freezes. The vertical expansion of the ice, in combination with the confining effect of surface tension on the spherical cap of remaining liquid, leads to the point formation.

Once the liquid is completely frozen, the sharp tip of the drop attracts water vapor in the air, much like a sharp metal lightning rod attracts electrical charges. The water vapor collects on the tip and a tree of small ice crystals starts to grow, as seen in the image.

An opposite effect has been shown to preferentially extract water molecules from the sharp edge of potato wedges in the oven, the researchers note.


Story Source:

The above story is based on materials provided by American Institute of Physics (AIP). Note: Materials may be edited for content and length.


Journal Reference:

  1. Oscar R. Enríquez, Álvaro G. Marín, Koen G. Winkels, Jacco H. Snoeijer. Freezing singularities in water drops. Physics of Fluids, 2012; 24 (9): 091102 DOI: 10.1063/1.4747185

Cite This Page:

American Institute of Physics (AIP). "Freezing water droplets form sharp ice peaks." ScienceDaily. ScienceDaily, 5 October 2012. <www.sciencedaily.com/releases/2012/10/121005092911.htm>.
American Institute of Physics (AIP). (2012, October 5). Freezing water droplets form sharp ice peaks. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2012/10/121005092911.htm
American Institute of Physics (AIP). "Freezing water droplets form sharp ice peaks." ScienceDaily. www.sciencedaily.com/releases/2012/10/121005092911.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Who Will Failed Nuclear Talks Hurt Most?

Who Will Failed Nuclear Talks Hurt Most?

Reuters - Business Video Online (Nov. 25, 2014) — With no immediate prospect of sanctions relief for Iran, and no solid progress in negotiations with the West over the country's nuclear programme, Ciara Lee asks why talks have still not produced results and what a resolution would mean for both parties. Video provided by Reuters
Powered by NewsLook.com
Flying Enthusiast Converts Real-Life Aircraft Cockpit Into Simulator

Flying Enthusiast Converts Real-Life Aircraft Cockpit Into Simulator

Reuters - Innovations Video Online (Nov. 25, 2014) — A virtual flying enthusiast converts parts of a written-off Airbus aircraft into a working flight simulator in his northern Slovenian home. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Car Park Solution for Flexible Green Energy

Car Park Solution for Flexible Green Energy

Reuters - Innovations Video Online (Nov. 24, 2014) — A British solar power start-up says that by covering millions of existing car park spaces around the UK with flexible solar panels, the country's power problems could be solved. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Microsoft Adds Robot Guards, Ushers In Sci-Fi Apocalypse

Microsoft Adds Robot Guards, Ushers In Sci-Fi Apocalypse

Newsy (Nov. 23, 2014) — Microsoft has robotic security guards working at its Silicon Valley Campus. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins