Question

1. Explain the kutta condition physically. Why is it necessary? 2. We have briefly outlined finite-difference and boundary- element methods for potential flow but have neglected the finite-element technique. Do some reading and write a brief essay on the use of the finite-element method for potential- flow problems?

Answer 1

The condition, necessary to obtain a unique solution and derived from the unsteady Bernoulli equation, implies that the energy supplied for the wing motion generates trailing-edge vortices and their overall effect, which depends on the motion initial parameters, is a jet of fluid that propels the wing.


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