In my physics textbook, there's a chapter on fluids which discusses pressure, flow rate, continuity, and the Bernoulli effect. I understand why pressure gradients induce net force on a column of fluid and why that subsequently causes the speed of the fluid to increase as it enters the low-pressure area.
The book goes on to mention some implications of the Bernoulli effect using the example of lift:
Could someone please explain why the speed of the wind increases when it passes over a concave-down shaped structure such as the top of the wing shown here? What exactly causes that speed to increase? I assume it has something to do with the streamlines approaching each other, but why would that cause acceleration?
Best Answer
The fluid that was initially flowing would have to shift a little bit upwards where there already exists fluid that was any way moving in that direction so at close approach to the surface there is same amount of fluid moving through lesser space and then we know
A1V1 = A2V2
Hence velocity increases similar way you can think for lower surface
Hope you can visualise