Posted by
Marcus G. Daniels on
Nov 28, 2009; 6:20am
URL: http://friam.383.s1.nabble.com/Hot-Air-and-Compressibilty-tp4078685p4078728.html
[hidden email] wrote:
>
> You have to sweep your hand at a speed comparable to that of sound
> (about 330 m/s here on earth) in order stop the air from getting away
> and to achieve any compression.
>
Ok, so in one of the articles mentioned,
http://physicsworld.com/cws/article/news/40993..it said..
"What they found was that a staggered column of alternately clockwise-
and anticlockwise-rotating turbines significantly enhances the speed of
turbine rotation. The reason, they say, is that the presence of
neighbouring turbines concentrates and accelerates the wind."
The term `concentrate', to me, sounds like a synonym of `compress' but
in any case `accelerate' could be true in any case.
The authors of the work are Caltech aerodynamics guys, so if all you'll
give us is, "Shut up and trust the experts", well...
Is their claim impossible?
Marcus
============================================================
FRIAM Applied Complexity Group listserv
Meets Fridays 9a-11:30 at cafe at St. John's College
lectures, archives, unsubscribe, maps at
http://www.friam.org