ABSTRACT
This chapter considers the velocity boundary layer on a flat plate that is subject to the steady and uniform parallel flow of a fluid. The integral method is a powerful and flexible technique for the approximate solution of boundary layer problems. It is based on the integration of the boundary layer conservation equations over the boundary layer thickness and the assumption of approximate and well-defined velocity, temperature, and mass fraction profiles in the boundary layer. The general approach is the same as for laminar boundary layers, with two differences. First, the assumed dimensionless velocity and temperature profiles should be compatible with turbulent boundary layers. Second, one must bear in mind that the simple profiles that are assumed for velocity and temperature will not be accurate very close to the wall where the laws-of-the-wall will determine the local shapes of these profiles.
