Boundary layer thin region adjacent to surface of a body where viscous forces dominate over inertia forces re re 1. The large in uence of the boundary layer is visible in the accompanying illustrations. Outside the boundary layer, the velocity increases up to point 2 so the pressure acting on the surface goes down. The concept of boundary layer was first introduced by l. Fluid mechanics by nptel download book free computer books. Download fluid mechanics by nptel download free online book chm pdf. Mechanical engineering introduction to fluid mechanics. Introduction to laminar boundary layer nptel mafiadoc.
Nptel aerospace interaction between outer inviscid flow and the boundary layer fluid is much less in. If x is the distance measured from the leading edge of a flat plate, the laminar. When a real fluid flows over a solid body, the velocity of fluid at the boundary will be zero. This video is part of the content developed by nptel. Flow of ideal fluids viscous incompressible flows, laminar boundary layers. This change in pressure is responsible for the form drag. So, boundary layer momentum thickness, which we denote by this. Aerospace engineering introduction to aerodynamics nptel. Boundary layers, separation, and drag advanced fluid. Boundary layer is a region in the immediate vicinity of the boundary surface in which the velocity of flowing fluid increases gradually from zero at the boundary surface to the velocity of the main stream. Freely browse and use ocw materials at your own pace.
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