Featured Research

from universities, journals, and other organizations

'Hot body' could help ships reduce drag

Date:
June 2, 2011
Source:
University of Melbourne
Summary:
New research into drag reduction has the potential to help industries such shipping to reduce energy use and carbon emissions.

New research into drag reduction has the potential to help industries such shipping to reduce energy use and carbon emissions.

Professor Derek Chan from the University of Melbourne's Department of Mathematics and Statistics said the research demonstrates a new way to minimise drag of fast moving projectiles in water.

A collaboration between the University of Melbourne and the King Abdulla University of Science and Technology in Saudi Arabia, the research was based on the 255 year-old Leidenfrost effect.

The Leidenfrost effect describes the phenomenon where a liquid produces an insulating vapour layer when it comes in contact with a solid surface that is hotter than its boiling point.

The new research used high-speed video footage to assess the drag produced from polished balls dropped into liquid. The results found that the drag on the ball is reduced to almost the minimum possible through the creating of an insulating vapour as it falls through the liquid.

Professor Chan said that the new drag reduction method has the potential to reduce energy costs for a broad range of applications, such as ocean transport and high-pressure pumping of liquid through pipelines.

"An obvious area of application is shipping," he said.

"Australia transports a large amount of products such as iron ore and grain around the world. The ship's hot body could substantially minimise the amount of drag as it passes through water, therefore potentially reducing transportation costs and greenhouse gas emissions."

"There are still a number of issues that need to be addressed before this drag reduction method can be applied commercially, such as the effect of increased heat on issues such as corrosion," he said.

The paper was published as a research highlight in Nature Physics, and in full by the Physical Review Letters, a peer-reviewed scientific journal published by the American Physical Society.

The University of Melbourne and the King Abdulla University are now writing a follow-up theory paper. While the first paper demonstrated that the drag reduction method is real and achievable, the follow-up paper will provide detailed theoretical analysis of the research.


Story Source:

The above story is based on materials provided by University of Melbourne. Note: Materials may be edited for content and length.


Journal Reference:

  1. Ivan Vakarelski, Jeremy Marston, Derek Chan, Sigurdur Thoroddsen. Drag Reduction by Leidenfrost Vapor Layers. Physical Review Letters, 2011; 106 (21) DOI: 10.1103/PhysRevLett.106.214501

Cite This Page:

University of Melbourne. "'Hot body' could help ships reduce drag." ScienceDaily. ScienceDaily, 2 June 2011. <www.sciencedaily.com/releases/2011/06/110602091832.htm>.
University of Melbourne. (2011, June 2). 'Hot body' could help ships reduce drag. ScienceDaily. Retrieved July 26, 2014 from www.sciencedaily.com/releases/2011/06/110602091832.htm
University of Melbourne. "'Hot body' could help ships reduce drag." ScienceDaily. www.sciencedaily.com/releases/2011/06/110602091832.htm (accessed July 26, 2014).

Share This




More Matter & Energy News

Saturday, July 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Europe's Highest Train Turns 80 in French Pyrenees

Europe's Highest Train Turns 80 in French Pyrenees

AFP (July 25, 2014) Europe's highest train, the little train of Artouste in the French Pyrenees, celebrates its 80th birthday. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
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:
from the past week

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