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Structures in stratified plane mixing layers and the effects of cross-shear

Published online by Cambridge University Press:  10 July 1997

P. ATSAVAPRANEE  and
M. GHARIB
P. ATSAVAPRANEE
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, CA 91125, USA
M. GHARIB
Affiliation:
Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, CA 91125, USA
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Abstract

A two-dimensional temporal mixing layer is generated in a stratified tilting tank similar to that used by Thorpe (1968). Extensive flow dynamics visualization is carried out using, for the top and bottom layers, fluids of different densities but of the same index of refraction. The two-dimensional density field is measured with the laser-induced fluorescence technique (LIF). The study examines further the classical problem of the two-dimensional mixing layer and explores the effects of cross-shear on a nominally two-dimensional mixing layer, a situation widespread in complex industrial and natural flows. Cross-shear is another component of shear, in plane with but perpendicular to the main shear of the base flow, generated by tilting the tank around a second axis.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 342 , 10 July 1997 , pp. 53 - 86
Copyright
© 1997 Cambridge University Press

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