Spatial simulation of boundary layer instability - Effects of surface roughnessThe effects of an isolated, two-dimensional roughness element on the spatial development of instability waves in boundary layers are investigated by numerically integrating the two-dimensional, time-dependent, incompressible Navier-Stokes equations, using a finite difference/Chebyshev discretization. It is shown that (high) inviscid frequencies have higher growth rates than Tollmien-Schlichting frequencies, indicating that disturbances growing in the separation zone are controlled by the inviscid instability of the shear layer at the edge of the separation zone.
Document ID
19930036190
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Danabasoglu, G. (NASA Langley Research Center Hampton, VA, United States)
Bringen, S. (Colorado Univ. Boulder, United States)
Streett, C. L. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1993
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 93-0075
Meeting Information
Meeting: AIAA, Aerospace Sciences Meeting and Exhibit