Question

The line integral of a closed curve around of a velocity field is defined as____________

(a) Vorticity

(b) Circulation

(c) Dilatation

(d) Streamline

I have been asked this question by my college professor while I was bunking the class.

The query is from Circulation topic in division Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

The correct option is (b) Circulation

The best explanation: Circulation is the line integral of the velocity around a closed curve in the flow. It depends on the velocity field and the selection of the curve. It defines the movement of the flow inside the curve. It is given by-

              Γ=∮c V. ds     where, Γ- circulation, ∮c – curve, V.ds – velocity field.