Ok. So I understand the concept of the Bernoulli Effect. Low pressure up top and High pressure down underneath of an air foil. What I do not understand is WHY a low pressure, or a lower pressure w.r.t. the underside of the air foil, is created. I've been told, it's because the air moves faster. If that is the case, then how does high velocity air contribute to low pressure. Seems counter-intuitive doesn't it?
I'm asking in hopes of leamens terms.
I was told that the "leeward" side of the top side of the airfoil creates a venturi like effect. The other is that because velocity is increased across the top, the air molecules have to separate even further creating a low pressure area. If the latter was the case, why arent the tops of airfoils crescent shaped?
On a side note, this is interesting: http://youtube.com/watch?v=qU1fixMAObI