Turbulent Flow Past a Surface-Mounted Two-Dimensional Rib

[+] Author and Article Information
S. Acharya, S. Dutta, T. A. Myrum, R. S. Baker

Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803

J. Fluids Eng 116(2), 238-246 (Jun 01, 1994) (9 pages) doi:10.1115/1.2910261 History: Received January 02, 1993; Revised September 07, 1993; Online May 23, 2008


The ability of the nonlinear k–ε turbulence model to predict the flow in a separated duct flow past a wall-mounted, two-dimensional rib was assessed through comparisons with the standard k–ε model and experimental results. Improved predictions of the streamwise turbulence intensity and the mean streamwise velocities near the high-speed edge of the separated shear layer and in the flow downstream of reattachment were obtained with the nonlinear model. More realistic predictions of the production and dissipation of the turbulent kinetic energy near reattachment were also obtained. Otherwise, the performance of the two models was comparable, with both models performing quite well in the core flow regions and close to reattachment and both models performing poorly in the separated and shear-layer regions close to the rib.

Copyright © 1994 by The American Society of Mechanical Engineers
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