Question

When an element moves in a flow field it translates, it also rotates along a streamline and in addition, its shape may undergo distortion.

(a) True

(b) False

This question was addressed to me in an online quiz.

This intriguing question comes from Angular Velocity, Vorticity, Strain in portion Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

The correct choice is (a) True

To elaborate: An element may undergo distortion because when a body translates n rotate some of its parts me undergo external forces because of the shape of the element may change. The amount of distortion depends on the velocity field.