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Study of the origin of three dimensional structures and chaos in an externally forced free shear layer

Williams-Stuber, K. and Gharib, M. (1989) Study of the origin of three dimensional structures and chaos in an externally forced free shear layer. AIAA Papers, 89-1021. American Institute of Aeronautics and Astronautics , New York.

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Experiments on an externally forced free shear layer are performed which study the origin of three-dimensional structures and chaos in shear flows. Transition routes between the laminar two-dimensional stages of shear flows and their final complex three-dimensional stages are examined. Two avenues of investigation are pursued. First, the general idea of a multi-frequency route to chaos is examined which treats the shear flow as an open dynamical system. An attempt is made to apply concepts from nonlinear dynamics to these systems. Secondly, a new approach to generating three-dimensional structures in shear flows which involves the creation of a spatial shear in the frequency of external perturbations is presented. In these experiments, a variety of vortex reconnection behaviors is observed at the discontinuity.

Item Type:Report or Paper (Report)
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URLURL TypeDescription
Gharib, M.0000-0002-2204-9302
Additional Information:© 1989 by K. Williams-Stuber and M. Gharib. Published by the American Institute of Aeronautics and Astronautics, Inc. with permission. The work presented here was sponsored by AFOSR under contract number AFOSR-87-0330.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)AFOSR-87-0330
Series Name:AIAA Papers
Issue or Number:89-1021
Record Number:CaltechAUTHORS:20130920-095600412
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41438
Deposited By: Tony Diaz
Deposited On:20 Sep 2013 19:28
Last Modified:10 Nov 2021 04:30

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