Is circulation around the closed circuit is zero?(a) True(b) FalseI had been asked this question in a job interview.I would like to ask this question from Kelvin’s Circulation Theorem and the Starting Vortex in portion Incompressible Flow over Airfoils of Aerodynamics

Is circulation around the closed circuit is zero?(a) True(b) FalseI ha

1.	Is circulation around the closed circuit is zero?(a) True(b) FalseI had been asked this question in a job interview.I would like to ask this question from Kelvin’s Circulation Theorem and the Starting Vortex in portion Incompressible Flow over Airfoils of Aerodynamics
Answer» Right answer is (a) True To elaborate: A DYED circuit, which is large enough to have been clear of all these regions SINCE the START of the motion. As the original state was ONE of rest, the circulation round that circuit will still be zero for time t.Therefore if we SKETCH in a line an instantaneous line in space at time t such that the curve encloses the airfoil but not the starting vortex.

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