Three-Dimensional Recirculation Flow in a Backward Facing Step

[+] Author and Article Information
Chiang Shih

Department of Mechanical Engineering, FAMU/FSU College of Engineering, Florida A & M University and Florida State University, Tallahassee, FL 32316

Chih-Ming Ho

Mechanical, Aerospace and Nuclear Engineering Department, University of California, Los Angeles, Los Angeles, CA 90024

J. Fluids Eng 116(2), 228-232 (Jun 01, 1994) (5 pages) doi:10.1115/1.2910259 History: Received October 27, 1992; Revised March 02, 1993; Online May 23, 2008


The flow field behind a small aspect ratio (channel width/step height = 3) backward-facing step is examined using laser Doppler anemometer. All three velocity components inside the separation region are surveyed in detail. The velocity profile just upstream of the step is laminar and two-dimensional. The velocity field reveals that the reattachment and the flow in the recirculation zone are highly three-dimensional due to the small aspect ratio.

Copyright © 1994 by The American Society of Mechanical Engineers
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