Application of the k–ε Turbulence Model to the Simulation of a Fully Pulsed Free Air Jet

[+] Author and Article Information
L. J. W. Graham, K. Bremhorst

Department of Mechanical Engineering, The University of Queensland, Queensland 4072, Australia

J. Fluids Eng 115(1), 70-74 (Mar 01, 1993) (5 pages) doi:10.1115/1.2910116 History: Received October 09, 1991; Online May 23, 2008


The work describes application of the k–ε turbulence model to a fully pulsed air jet. The standard model failed to predict the change in slope of the velocity decay where the jet changes from pulsed to steady jet behavior. A change in one of the constants of the k–ε model based on the behavior of the periodic velocity component relative to the intrinsic component yielded satisfactory results. Features of the pulsed jet which were successfully simulated included the flow reversal near the edge of the jet, increased entrainment when compared to steady jets and large radial outflow near the leading edge of the pulse and large radial inflow near the outer edge of the jet for the remainder of the pulse.

Copyright © 1993 by The American Society of Mechanical Engineers
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