Direct numerical study of crossflow instabilityDisturbances in the swept Hiemenz flow are calculated by solving the Navier-Stokes equations. The spatially-evolving base flow is treated exactly, allowing a check of the 'local' stability theories. Different types of disturbances such as random noise, waves, and wave packets, are input near the attachment line, develop in space, and exit through an outflow boundary. They all generate streamwise vortices. The effect of the Reynolds number, of the time-dependence of the noise, and of nonlinearity, are investigated.
Document ID
19910055333
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Spalart, P. R. (NASA Ames Research Center Moffett Field, CA, United States)