Three-Dimensional Buoyant Wall Jets Released Into a Coflowing Turbulent Boundary Layer

[+] Author and Article Information
J. R. Sinclair, P. R. Slawson, G. A. Davidson

Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

J. Heat Transfer 112(2), 356-362 (May 01, 1990) (7 pages) doi:10.1115/1.2910385 History: Received October 31, 1988; Revised June 07, 1989; Online May 23, 2008


Experiments have been conducted in a water flume to simulate finite-length line sources of heat that issue horizontally at ground level into a coflowing turbulent shear flow. The downstream development of each buoyant jet is documented by detailed mean temperature measurements, which are analyzed to determine the jet trajectory, spread rates, and distance to the point of liftoff from the surface. In addition, a three-dimensional, parabolic, numerical model based on the fundamental conservation equations is developed. Model predictions of several buoyant jets compare reasonably with the experimental data and suggest that the strength of the streamwise vorticity plays an important role in governing liftoff of a buoyant wall jet from the surface.

Copyright © 1990 by The American Society of Mechanical Engineers
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