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Posted for "George/Shirley Shattuck" <kloop@plantationcable.net>:
Thanks for your response. I had the thought that the spanwise flow ocurred
on the top of the wing in addition to the bottom of the wing. But what you
said makes sense considering the wing tip vorteses that rotate off the
wingtip trailing edge. Good. Learned something.
George
over the wing?>> I think of it like this. The movement of the wing
through
the air causes higher pressure on the bottom than on the top. (I won't
start the argument about why this isn't the mechanism that directly
creates
lift, but it doesn't. <g>) The air "tries" to seek the lower pressure on
the top side of the wing. One route is around the outer end of the wing,
hence outward spanwise flow on the bottom of the wing, but inward spanwise
on the top. You should see more spanwise flow at the tip decreasing to
essentially none at the root.
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