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Word of the Day – Wednesday, November 1st

 


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EDDY (ED-ee)

A current of fluid running back, or in a direction contrary to the main current.
Common clues:
Whirlpool; Canoer's worry; Current event?; Sea swirl; Mini-whirlpool; Vortex; Jacuzzi effect; Bit of a whirl; It may be found near a drain; Small revolver?
Crossword puzzle frequency: 6 times a year
Frequency in English language: 16751 / 86800
Video:
How to kayak – what is an eddy




Used with permission: Watts Hudgens


In fluid dynamics, an eddy is the swirling of a fluid and the reverse current (water) created when the fluid flows past an obstacle. The moving fluid creates a space devoid of downstream-flowing water on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle. This phenomenon is most visible behind large emergent rocks in swift-flowing rivers.



This article is licensed under the GNU Free Documentation License (http://www.gnu.org/copyleft/fdl.html). It uses material from http://en.wikipedia.org/wiki/Eddy
















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