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An investigation of the topography and motion of the turbulent interface

Published online by Cambridge University Press:  29 March 2006

S. T. Paizis  and
W. H. Schwarz
S. T. Paizis
Affiliation:
Department of Mechanics and Materials Science, The Johns Hopkins University
W. H. Schwarz
Affiliation:
Department of Mechanics and Materials Science, The Johns Hopkins University
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Abstract

The sharp interface which exists in unbounded turbulent shear flows was studied using a linear array of twenty hot-wire probes. The probe arrangement was such that the location of the interface could be monitored instantaneously. The particular flow examined was a two-dimensional turbulent wall jet. It was found that the interface is a highly contorted surface which exhibits a significant amount of folding. Quantitative methods for characterizing this behaviour are presented, together with pertinent measurements. In addition, measurements of the mean surface area of the interface, and space-time corrrelations of the width of the turbulence were obtained. The latter were used to find characteristic scales and convection velocities of the interface.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 63 , Issue 2 , 3 April 1974 , pp. 315 - 343
Copyright
© 1974 Cambridge University Press

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