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Re: [Phys-l] air pressure question



Some will say that the 'Coanda' effect rather than the 'Bernoulli' effect is the 'correct' explanation.
To me, this is a bit overly restrictive - since that the Coanda Effect makes use of the Bernoulli Effect in order for the ambient fluid to be entrained by the moving stream.


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At 2:35 PM -0700 1/26/11, William Robertson wrote:
Well, it seems in this lecture that he is making the same mistake that I and others were regarding Bernoulli. In particular, he compares the still air in an atomizer with the moving air flowing above it and says the flowing air therefore has a lower pressure. But didn't we learn in our conversations here that it is wrong to compare moving air in one place with still air in another? Doesn't Bernoulli apply only to a continuous column of air?

Still doesn't answer my question about the Floogle, as it's called in some places.

Bill



On Jan 24, 2011, at 4:50 PM, brian whatcott wrote:


May I suggest you audit the chalk and talk by Ramamurti Shankar ?
I admit that I am biased by the civilized Indian gloss that Prof Shankar
brings to it.
And you may notice that he catches himself at the too easy Bernoulli
explanation
of airfoil lift. If you are at all impatient, you might start at
minute 48.
http://www.youtube.com/watch?v=lfXDJKKPGfY

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