Question

Vortex flow occurs at ___________

(a) Leading edge

(b) Trailing edge

(c) Chord

(d) Chamber line

This question was addressed to me by my college professor while I was bunking the class.

Question is taken from The Kutta Condition in section Incompressible Flow over Airfoils of Aerodynamics

Answer 1

Right answer is (b) Trailing edge

Explanation: Vortex flow occurs at the trailing edge and because the radius of the sharp trailing edge is zero, the speed of the air around the trailing edge should be infinitely fast, real fluid cannot move at infinite speed, they can move extremely fast finite speed.