Journal of Fluid Mechanics

Plane turbulent buoyant jets. Part 1. Integral properties

Nikolas E.  Kotsovinos a1p1 and E. J.  List a1
a1 W. M. Keck Laboratory of Hydraulics and Water Resources, California Institute of Technology, Pasadena

Article author query
kotsovinos ne   [Google Scholar] 
list ej   [Google Scholar] 


An integral technique suggested for the analysis of turbulent jets by Corrsin & Uberoi (1950) and Morton, Taylor & Turner (1956) is re-examined in an attempt to improve the description of the entrainment. It is determined that the hypothesis of Priestley & Ball (1955), that the entrainment coefficient is a linear function of the jet Richardson number, is reasonable, and that two empirically determined plume parameters are sufficient to describe the transition of buoyant jets to plumes. The results of a series of experiments in which both time-averaged velocity and time-averaged temperature profiles were recorded in a substantial number of plane turbulent buoyant jets of varying initial Richardson numbers are used to verify the basic ideas. In addition, measurements of the mean tracer flux in a series of buoyant jets indicate that as much as 40% of the transport in plumes is by the turbulent flux.

(Published Online April 12 2006)
(Received January 28 1976)
(Revised June 9 1976)

p1 Present address: School of Engineering, University of Patras, Greece.