On the Use of Lagrangian Variables in Descriptions of Unsteady Boundary-Layer Separation
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
Published: 2018-07-10
Total Pages: 70
ISBN-13: 9781722679392
DOWNLOAD EBOOKThe Lagrangian description of unsteady boundary layer separation is reviewed from both analytical and numerical perspectives. It is explained in simple terms how particle distortion gives rise to unsteady separation, and why a theory centered on Lagrangian coordinates provides the clearest description of this phenomenon. Some of the more recent results for unsteady three dimensional compressible separation are included. The different forms of separation that can arise from symmetries are emphasized. A possible description of separation is also included when the detaching vorticity layer exits the classical boundary layer region, but still remains much closer to the surface than a typical body-lengthscale. Cowley, Stephen J. and Vandommelen, Leon L. and Lam, Shui T. Unspecified Center...