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RESEARCH PAPERS

The Interaction of Rolling Vortices With a Turbulent Boundary Layer

[+] Author and Article Information
M. J. Donnelly, O. K. Rediniotis, S. A. Ragab, D. P. Telionis

Department of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0219

J. Fluids Eng 117(4), 564-570 (Dec 01, 1995) (7 pages) doi:10.1115/1.2817302 History: Received June 27, 1994; Revised September 01, 1995; Online December 04, 2007

Abstract

Laser-Doppler velocimetry is employed to measure the periodic field created by releasing spanwise vortices in a turbulent boundary layer. Phase-averaged vorticity and turbulence level contours are estimated and presented. It is found that vortices with diameter of the order of the boundary layer quickly diffuse and disappear while their turbulent kinetic energy spreads uniformly across the entire boundary layer. Larger vortices have a considerably longer life span and in turn feed more vorticity into the boundary layer.

Copyright © 1995 by The American Society of Mechanical Engineers
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