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Intermittency in a thermal mixing layer

Published online by Cambridge University Press:  11 April 2006

J. F. Keffer ,
G. J. Olsen  and
J. G. Kawall
J. F. Keffer
Affiliation:
Department of Mechanical Engineering, University of Toronto, Canada M5S 1A4
G. J. Olsen
Affiliation:
Department of Mechanical Engineering, University of Toronto, Canada M5S 1A4
J. G. Kawall
Affiliation:
Department of Mechanical Engineering, University of Toronto, Canada M5S 1A4
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Abstract

An investigation of the existence of purely thermal intermittency has been undertaken for the flow produced by a step change in temperature in a decaying homogeneous turbulent field. The results show that a thermal interface can be defined and that it is a random function of space and time, having gross characteristics similar to the turbulent interface in a free shear flow. A technique for identifying the hot and cold regions of the fluid in a systematic way was developed and this permitted conditional averages of the mean and fluctuating temperature to be formed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 79 , Issue 3 , 9 March 1977 , pp. 595 - 607
Copyright
© 1977 Cambridge University Press

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