$4\mathrm{.}2.$ Assume that the inviscid external flow over a configuration is given by

$u_e=Ax$

Chap, $4/$ Viscous Boundary Layers

Thus, the stagnation point occurs at the leading edge of the configuration $($i$.$e$.,$ at $x=0).$ Obtain the expression for $.$ Using Fig. $4\mathrm{.}4$ and assuming that the boundary layer is laminar, determine the value of $f^{\text{'}\text{'}}(0),$ that is$,$ the value of the shear function at the wall. What is the relation between the shear at a given value of $x$ for this flow and that for a flat plate?