Multistructured boundary layers on flat plates and related bodies

Compressible and incompressible supersonic fluid flow is investigated. The Navier-Stokes equations for Newtonian fluids are solved by matched asymptotic expansions. The boundary-layer flow is found to consist of a triple deck in both the compressible and incompressible cases. The fundamental equation of the triple deck is found and the conditions for its validity are considered. The discussion of compressible fluids covers transonic and supersonic free interactions; expansive and compressive free interactions; the post-separation region; convex corners in supersonic flow; and injection into the supersonic boundary layer. Trailing edge flows for bodies with finite thickness, viscous corrections to the lifting forces on aerodynamic shapes, and catastrophic separation are also analyzed.