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Numerical Simulation of Three-Dimensional Separated Flow and Heat Transfer in a Sudden-Expansion Channel

[+] Author Affiliations
Terukazu Ota, Masafumi Mori, Hiroyuki Yoshikawa

Tohoku University, Sendai, Japan

Paper No. FEDSM2002-31094, pp. 1247-1252; 6 pages
doi:10.1115/FEDSM2002-31094
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

Numerical results of three-dimensional laminar separated and reattached flow and heat transfer in a suddenly-expanded rectangular channel are presented in this paper. Numerical calculations of Navier-Stokes equations and energy one are carried out using the finite difference method for three aspect ratios of 1.0, 2.0 and 4.0 at Reynolds numbers from 100 to 500. It is found that streamwise vortex pairs are generated, and their induced velocities shrink the major axis side of core flow, bringing about the flow toward the channel center line. Further, the minor axis moves outward as carrying the core fluid. Heat transfer mechanism in these mixing processes of flow is clarified.

Copyright © 2002 by ASME

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