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Wavelet Analysis of the 3-D Wake Topology for a Square Prism

[+] Author Affiliations
Adrian Dobre, Horia Hangan

University of Western Ontario, London, ON, Canada

Paper No. FEDSM2002-31112, pp. 1541-1546; 6 pages
doi:10.1115/FEDSM2002-31112
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

The three-dimensional flow topology of square prism intermediate wake flow based on multi-point hot-wire measurements is investigated using wavelet analysis. A number of continuous wavelet techniques combining time and scale analysis are applied systematically to detect the primary and the secondary flow structures and to validate previously proposed topological models. Our results suggest that a preferred alternate rib spanwise arrangement similar to the one proposed by Meiburg and Lasheras [1] is plausible for the vortex topology of high Reynolds number square prism intermediate wakes. Moreover, it seems that the wake topology has a preferred spanwise wavelength of approximately 2b = 2.4d, which gives a relative spanwise/ streamwise wavelength ( 2b / λ ) of 2/5.

Copyright © 2002 by ASME
Topics: Wakes , Topology , Wavelets

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