ABSTRACT
In the last chapter, the remark was made that most fluids problems involve turbulent flow. An exact analysis to determine velocities in the principal flow directions requires a simultaneous solution to the continuity and momentum equations. Because of the nonlinearity of the equations of motion, some simplifications have to be made. In that regard, the flow field may be divided into two portions. One of these is a nonviscous region away from any solid boundaries. Near a boundary, however, fluid adheres to the surface, and the velocity relative to the boundary at the surface is zero. Because this result is a viscous effect, the second flow region is one where viscosity is important. The flow in this region, known as boundary-layer flow, is the subject of this chapter.
