The Linear Stability of a Flat Plate Boundary-Layer Approaching a Cylindrical Obstacle

[+] Author and Article Information
R. E. Spall

Department of Mechanical Engineering, University of South Alabama, Mobile, AL 36688

M. R. Malik

High Technology Corporation, Hampton, VA 23666

J. Fluids Eng 114(3), 306-312 (Sep 01, 1992) (7 pages) doi:10.1115/1.2910031 History: Received February 20, 1991; Online May 23, 2008


The linear stability of the low-speed three-dimensional flow over a flat plate with an attached cylinder is studied. The region of interest is upstream of the initial separation point and includes the effects of both adverse and favorable pressure gradients, as well as crossflow. The resulting boundary-layer is subject to both the Tollmien-Schlichting (TS) and crossflow instabilities. Linear stability calculations, using N-factor correlations, indicate that the transition process would be dominated by TS instabilities, although for low frequencies crossflow-type disturbances are important.

Copyright © 1992 by The American Society of Mechanical Engineers
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