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Is vortex filament cannot begin or terminate in the air?

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in Aerodynamics by (773k points)
Is vortex filament cannot begin or terminate in the air?

(a) True

(b) False

I have been asked this question in my homework.

This intriguing question originated from Prandtl’s Classical Lifting-Line Theory in section Flow over Airfoils over Finite Wing of Aerodynamics

1 Answer

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Best answer
Correct option is (a) True

Explanation: The vortex filament cannot begin or terminate in the air, as such, any span wise change in lift can be modeled as the shedding of a vortex filament down the flow, behind the wing. This shed vortex, hose strength is the derivative of the local wing.

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