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Vortices Within the Flow Separation in a Decelerating Channel Flow: Time-Averaged Characteristics

[+] Author Affiliations
Y. Kinoue, T. Setoguchi, K. Kaneko

Saga University, Saga, Japan

T. Murasaki

Kyushu Railway Company, Fukuoka, Japan

M. Inoue

Kyushu University, Fukuoka, Japan

Paper No. FEDSM2002-31417, pp. 1205-1210; 6 pages
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME


An experimental equipment for studying the vortex behavior in 3D flow separation was constructed to have a comprehensive understanding of a separated channel flow. The separation occurs on three side walls of the straight channel by the suction from a porous side wall. Several types of separation can be generated by changing the sucked flow rate and providing the inlet flow with velocity gradient. For a strong decelerating-flow without the inlet velocity gradient, an alternate flow pattern with an opposite vortex occurs at considerably irregular intervals. With the inlet velocity gradient, a vortex appears and disappears along an inclined separation line for a moderate decelerating-flow, and a large stable vortex exists in the separation region for a strong decelerating-flow. The behavior of these vortices was examined and discussed in relation to the vortices including in the inlet flow.

Copyright © 2002 by ASME



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