Question

The curl of velocity equals to _______

(a) velocity

(b) pressure

(c) vorticity

(d) angular velocity

This question was addressed to me in an internship interview.

I need to ask this question from Angular Velocity, Vorticity, Strain in division Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

The correct answer is (c) vorticity

The explanation: The curl of velocity and the vorticity for a 3D flow is the same. Therefore, the curl of velocity equals to the vorticity of the 3D flow element. The equation can be defined by 2*ω = ∇*V where  ∇*V – curl of velocity and 2*ω is the vorticity.