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Generation of lift over an airfoil and formation of starting vortex is correctly explained by which of these?

Generation of lift over an airfoil and formation of starting vortex is correctly explained by which of these? Correct Answer Kutta Condition and Kelvin’s Theorem

Kutta condition enforces smooth flow at the trailing edge. In doing so high velocity gradients formed at the trailing edge generates vorticity and hence circulation is there. From Kelvin’s circulation theorem starting vortex is formed to conserve circulation.

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