An investigation of the topography and motion of the turbulent interface

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....

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Bibliographic Details
Published in:Journal of fluid mechanics 1974-04, Vol.63 (2), p.315-343
Main Authors: Paizis, S. T., Schwarz, W. H.
Format: Article
Language:English
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Summary: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.
ISSN:0022-1120
1469-7645
DOI:10.1017/S0022112074001169