September 16, 2007 Issue

Physics To Go 33 - Spinning fluid

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Physics in Your World

Wing Vortex Wake image
photo credit: NASA; image source

Wing Vortex Wake

This photo (hi-res version) shows the vortex wake behind a small propeller plane.  To learn more about this photo, visit Wing Vortex Wake.

For more on wing vortices, and the danger they can pose to small planes following large ones, see the US Centennial of Flight Commission's Wing Vortices and Wikipedia's Wingtip Vortices. For an illustrated study of the Boeing 747's wing vortices, see NASA's Boeing 747.

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Physics at Home

Air Cannon

You can build your own "vortex generator" with just a few simple, household materials.  The PBS' Air Cannon shows how to build an air cannon from a plastic bag, bucket, and rubber bands--just be sure to have an adult working with you.  There is even a poll so that you can report your results and compare them with what others found.

(This feature was updated on June 28, 2010)


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From Physics Research

Model of Insect Wings' Wake Vortex image
photo credit: Yakov Afanasyev; image source

Model of Insect Wings' Wake Vortex

This photo (hi-res version) shows the wake of an insect model towed in water, with magnetic forces simulating the effect of the insect's beatings wings. To learn more, visit Yakov Afanasyev, Memorial University of Newfoundland (and scroll down). For a different kind of investigation of insect flight, see Michael Dickinson's Fly-o-Rama, which includes a robotic fly and a flight simulator for flies.


Worth a Look

Vortices Image Gallery

To see some interesting images of vortices, visit Image Gallery-Vortices from the University of Iowa.


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