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Plane waves and structures in turbulent channel flowA direct simulation of turbulent flow in a channel is analyzed by the method of empirical eigenfunctions (Karhunen-Loeve procedure, proper orthogonal decomposition). This analysis reveals the presence of propagating plane waves in the turbulent flow. The velocity of propagation is determined by the flow velocity at the location of maximal Reynolds stress. The analysis further suggests that the interaction of these waves appears to be essential to the local production of turbulence via bursting or sweeping events in the turbulent boundary layer, with the additional suggestion that the fast acting plane waves act as triggers.
Document ID
19910033811
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sirovich, L. (Brown University Providence, RI, United States)
Ball, K. S. (Texas, University Austin, United States)
Keefe, L. R. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1990
Publication Information
Publication: Physics of Fluids A
Volume: 2
ISSN: 0899-8213
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Funding Number(s)
CONTRACT_GRANT: N00014-86-K-0754
Distribution Limits
Public
Copyright
Other