1. Using the sinusoidal shape (u/Ue) = sin(πz/2δ), z ≤ δ, calculate the expression for the boundary-layer thickness δ by evaluating the von Karm´ an integral ´ equation.
2. Use the results from the previous problem to calculate the local shear on the wall and the total drag for a plate with a length L. How does this approximation compare with the exact result of Blasius?