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Phase decorrelation of coherent structures in a free shear layerThe vortices near the origin of an initially laminar mixing layer have a single frequency with a well-defined phase; i.e., there is little phase jitter. Further downstream, however, the phase jitter increases suddenly. Even when the flow is forced, this same transition is observed. The forcing partially loses its influence because of the decorrelation of the phase between the forcing signal and the passing coherent structures. In the present investigation, this phenomenon is documented and the physical mechanism responsible for the phase decorrelation is identified.
Document ID
19910071248
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ho, Chih-Ming
(University of Southern California Los Angeles, CA, United States)
Zohar, Yitshak
(University of Southern California Los Angeles, CA, United States)
Foss, Judith K.
(Southern California, University Los Angeles, CA, United States)
Buell, Jeffrey C.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1991
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 230
ISSN: 0022-1120
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
91A55871
Distribution Limits
Public
Copyright
Other

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