On Wed, 01 November 2000, Daniel Olin Miller wrote:
> Let's not perpetuate any misconceptions. ....
> When the streamlines come back together at the TE, there is no law of man
> or nature that says the particles that were seperated at the LE see each
> other again. In fact, for an airfoil at positive lift, it can be shown
> that for two infintesimal particles parting ways at the forward stagnation
> point, the upper one reaches the TE while the lower one is still loitering
> well ahead of the TE.
So this implies that in steady flight there is more air going under the
LE than coming out at the TE. (Alternatly more air leaving the upper
surface past TE than entering) Wouldn't that result in continuously
increasing density under the wing (or vaccume over) as long as it is moving?
You might work this into a perpetual motion machine.
The law of nature that applies here is that two objects cannot occupy
the same space at the same time. The density can not increase forever.
JH
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