Question

Is inviscid incompressible fluid has constant density?

(a) False

(b) True

This question was addressed to me in an online interview.

The query is from Kelvin’s Circulation Theorem and the Starting Vortex topic in section Incompressible Flow over Airfoils of Aerodynamics

Answer 1

The correct option is (a) False

For explanation I would say: According to the kelvin’s circulation theorem an inviscid incompressible fluid of constant density be in motion in the presence of a conservative body force g per unit mass. Let c (t) denote a closed circuit that consists of the same fluid particles as time proceeds.