Turbulent Flow Around a Bluff Rectangular Plate. Part II: Numerical Predictions

[+] Author and Article Information
N. Djilali

Department of Mechanical Engineering, University of Victoria, Victoria, Canada V8W 3P6

I. S. Gartshore, M. Salcudean

Department of Mechanical Engineering, University of British Columbia, Vancouver, Canada V6T 1W5

J. Fluids Eng 113(1), 60-67 (Mar 01, 1991) (8 pages) doi:10.1115/1.2926498 History: Received August 08, 1989; Online May 23, 2008


This paper presents calculations of the time-averaged separated-reattaching flow around a bluff rectangular plate, using a finite difference procedure and the k-ε turbulence model. Two discretization methods are used: the hybrid differencing scheme, and the bounded skew hybrid differencing scheme. The latter, although superior to the former for all grid distributions, results in a reattachment length about 30 percent shorter than the measured value. When a modification which takes into account streamline curvature is incorporated into the k-ε model, a marked improvement in the predictions is obtained. A reattachment length of 4.3 plate thicknesses (D), compared to an experimental value of 4.7D, is obtained, and the predicted mean flow field, turbulent kinetic energy and pressure distributions within the separation bubble are found to be in good agreement with experiments.

Copyright © 1991 by The American Society of Mechanical Engineers
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