Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. 24/7 Space News .




TIME AND SPACE
A Whirling Dervish puts physicists in a spin
by Staff Writers
London, UK (SPX) Dec 08, 2013


The Whirling Dervishes, who have become a popular tourist attraction in Turkey, are a religious movement who commemorate the 13th-century Persian poet, Rumi, by spinning on the spot and creating mesmerising patterns with their long skirts.

A force that intricately links the rotation of the Earth with the direction of weather patterns in the atmosphere has been shown to play a crucial role in the creation of the hypnotic patterns created by the skirts of the Whirling Dervishes.

This is according to an international group of researchers who have demonstrated how the Coriolis force is essential for creating the archetypal, and sometimes counterintuitive, patterns that form on the surface of the Whirling Dervishes skirts by creating a set of very simple equations which govern how fixed or free-flowing cone-shaped structures behave when rotating.

The equations, which have been published in the Institute of Physics and German Physical Society's New Journal of Physics, were able to reproduce the sharp peaks and gentle troughs that appear along the flowing surface of the Dervishes' skirts and showed a significant resemblance to real-life images.

The Whirling Dervishes, who have become a popular tourist attraction in Turkey, are a religious movement who commemorate the 13th-century Persian poet, Rumi, by spinning on the spot and creating mesmerising patterns with their long skirts. A YouTube video of the Whirling Dervishes in action can be viewed here.

Co-author of the study James Hanna, from Virginia Polytechnic Institute and State University, said: "The dancers don't do much but spin around at a fixed speed, but their skirts show these very striking, long-lived patterns with sharp cusp-like features which seem rather counterintuitive."

Hanna, along with Jemal Guven at the Universidad Nacional Autonoma de Mexico and Martin Michael Muller at Universite de Lorraine, found that it was the presence of a Coriolis force that was essential in the formation of the different patterns.

The Coriolis effect accounts for the deflection of objects on a rotating surface and is most commonly encountered when looking at the Earth's rotations and its effect on the atmosphere around it. The rotation of the Earth creates the Coriolis force which causes winds to be deflected clockwise in the Northern Hemisphere and anti-clockwise in the Southern Hemisphere - it is this effect which is responsible for the rotation of cyclones.

"Because the sheet is conically symmetric, material can flow along its surface without stretching or deforming. You can think of the rotating Earth, for example, with the air of the atmosphere free to flow around it.

"The flow of a sheet of material is much more restrictive than the flow of the atmosphere, but nonetheless it results in Coriolis forces. What we found was that this flow, and the associated Coriolis forces, plays a crucial role in forming the dervish-like patterns," Hanna continued.

By providing a basic mathematical description of the spinning skirts of the Dervishes, the researchers hope their future research will discern how different patterns are selected, how stable these patterns are and if gravity or any other effects make a qualitative difference.

The published version of the paper 'Whirling skirts and rotating cones' (Jemal Guven et al 2013 New J. Phys, 15 113055) will be freely available online from Wednesday 27 November.

.


Related Links
Institute of Physics
Understanding Time and Space






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TIME AND SPACE
No qualms about quantum theory
Heidelberg, Germany (SPX) Dec 03, 2013
A colloquium paper published in EPJ D looks into the alleged issues associated with quantum theory. Berthold-Georg Englert from the National University of Singapore reviews a selection of the potential problems of the theory. In particular, he discusses cases when mathematical tools are confused with the actual observed sub-atomic scale phenomena they are describing. Such tools are essenti ... read more


TIME AND SPACE
Silent Orbit for China's Moon Lander

China's most moon-like place

LADEE Instruments Healthy and Ready for Science

China launches first moon rover mission

TIME AND SPACE
Rover results include first age and radiation measurements on Mars

Mars lake may have been friendly to microbes: NASA

One-way ticket to Mars: space colonists wanted!

Martian Laser Surpasses 100,000 Zaps

TIME AND SPACE
Space exploration can drive the next agricultural revolution

Global patent growth hits 18-year high

Facebook joins NYU in artificial intelligence lab

LAS Tower Complete in Preparation for Orion's First Mission

TIME AND SPACE
China moon rover enters lunar orbit: Xinhua

Turkey keen on space cooperation with China

China space launch debris wrecks villagers' homes: report

Designer: moon rover uses cutting-edge technology

TIME AND SPACE
New crew to run space station in March

Russian android may take on outer space operations at ISS

Repurposing ISS Trash for Power and Water

Russian spacecraft with advanced navigation system docks with ISS

TIME AND SPACE
Russian Proton-M rocket launches Inmarsat-5F1 satellite

Basic build-up is being completed for Arianespace's Soyuz to launch Gaia

Third time a charm: SpaceX launches commercial satellite

Arianespace's role as a partner for the US satellite industry

TIME AND SPACE
Hot Jupiters Highlight Challenges in the Search for Life Beyond Earth

Astronomers find strange planet orbiting where there shouldn't be one

Hubble Traces Subtle Signals of Water on Hazy Worlds

Astronomers detect water in atmosphere of distant exoplanets

TIME AND SPACE
SST Australia: Signed, Sealed and Ready for Delivery

Scientists build a low-cost, open-source 3D metal printer

An ecosystem-based approach to protect the deep sea from mining

Study shows how water dissolves stone, molecule by molecule




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement