The trailing vortex is formed at each wing-tip as there is a circulatory motion established by the____(a) Leaking flow at the wing- tips(b) Flowing wind(c) Viscosity(d) Air tornadoesThis question was addressed to me by my college director while I was bunking the class.I want to ask this question from Downwash and Induced Drag in section Flow over Airfoils over Finite Wing of Aerodynamics

The trailing vortex is formed at each wing-tip as there is a circulato

1.	The trailing vortex is formed at each wing-tip as there is a circulatory motion established by the____(a) Leaking flow at the wing- tips(b) Flowing wind(c) Viscosity(d) Air tornadoesThis question was addressed to me by my college director while I was bunking the class.I want to ask this question from Downwash and Induced Drag in section Flow over Airfoils over Finite Wing of Aerodynamics
Answer» The correct answer is (a) Leaking flow at the WING- tips The explanation is: The flow has a TENDENCY to ‘leak’ around the wing-tips. This flow makes a circulatory motion that trails DOWNSTREAM of the finite weak, GIVING rise to trailing vortices. This flow is POSSIBLE because of viscosity but it doesn’t happen because of viscosity.

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