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Two nonlinear control schemes contrasted on a hydrodynamiclike modelThe principles of two flow control strategies, those of Huebler (Luescher and Huebler, 1989) and of Ott et al. (1990) are discussed, and the two schemes are compared for their ability to control shear flow, using fully developed and transitional solutions of the Ginzburg-Landau equation as models for such flows. It was found that the effectiveness of both methods in obtaining control of fully developed flows depended strongly on the 'distance' in state space between the uncontrolled flow and goal dynamics. There were conceptual difficulties in applying the Ott et al. method to transitional convectively unstable flows. On the other hand, the Huebler method worked well, within certain limitations, although at a large cost in energy terms.
Document ID
19930048608
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Keefe, Laurence R. (Nielsen Engineering and Research Mountain View, CA, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Physics of Fluids A
Volume: 5
Issue: 4
ISSN: 0899-8213
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Funding Number(s)
CONTRACT_GRANT: NAS1-19256
Distribution Limits
Public
Copyright
Other