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The Iconoclast

‹‹ The Mother-Lode

The United States Has No Stake In Bringing Together Sunni And Shi'a. ››

Thursday, 21 June 2007

Whorl Reverse

In college courses on applied math (and possibly physics) there is a topic called "Fluid Mechanics," widely—but falsely—regarded a a soft elective because it is all governed by just one equation (given a plural here, but basically just one). It's the study of how fluids move ( e.g. oil through pipelines) and how objects move through fluids (e.g. planes, submarines).

OK, got the following from a reader who knows his fluid mechanics:

Mr Derbyshire—-The following can be found with attribution in Mandelbrot's Les Objets Fractal:

Little whorls have littler whorls
Increasing with velocity.
And littler whorls have littler whorls
And so on till viscosity.

(Of course a take-off on Swift's 'Little fleas have littler fleas / Upon their backs to bite 'em / And littler fleas have littler fleas / And so ad infinitum.')

Submit Your Comment

Posted on 06/21/2007 9:32 AM by John Derbyshire

Comments

21 Jun 2007

greenmamba
Hmm ...
Mary had a little Euler
Bernoulli its appellation
Eddy loved them both to bits
but Mary had pump cavitation

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