DYNAMICAL CHARACTERIZATION OF THE SPATIOTEMPORAL STRUCTURES IN THE WAKE OF A BLUFF BODY
Singular systems analysis (SSA) and cluster analysis are used to map out and characterize the three-dimensional spatiotemporal structures encountered in the wake of a finite-aspect-ratio circular cylinder. The evolution of the wake structure, determined using experimentally obtained velocity time series, was studied as it underwent transition in the range of Reynolds numbers 100 to 200. Using these techniques important new features in the wake structure are identified: for example, it is seen that the whole of the pre- transitional wake is simply ordered by the nonlinear mixing of modes generated in the near wake region, whilst, after transition, a localized region of turbulence exists.
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Supplemental Notes:
- J Fluids and Structures, v 10 n 1, Jan 1996, p 21 [20 p, 15 ref, 11 fig]
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Authors:
- Stocks, N G
- Shaw, C T
- King, G P
- Publication Date: 1996
Language
- English
Subject/Index Terms
- TRT Terms: Cluster analysis; Systems analysis; Wakes
- Uncontrolled Terms: Clustering
- Old TRIS Terms: Blunt bodies
- Subject Areas: Data and Information Technology; Marine Transportation;
Filing Info
- Accession Number: 00727777
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Nov 4 1996 12:00AM