Hostname: page-component-6d856f89d9-gndc8 Total loading time: 0 Render date: 2024-07-16T08:32:51.364Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on spanwise structure in the two-dimensional mixing layer

Published online by Cambridge University Press:  19 April 2006

F. K. Browand  and
T. R. Troutt
F. K. Browand
Affiliation:
Department of Aerospace Engineering, University of Southern California, Los Angeles, California 90007
T. R. Troutt
Affiliation:
Department of Aerospace Engineering, University of Southern California, Los Angeles, California 90007
Get access Rights & Permissions [Opens in a new window]

Abstract

The lateral extent of the large-scale features of a high-Reynolds-number, turbulent mixing layer are studied by means of an array of twelve hot wires placed across the span of the wind tunnel. Correlation measurements show that the large-scale structure rapidly approaches an asymptotic state, in which the lateral correlation length becomes proportional to the local mixing-layer thickness. Visualizations of the instantaneous hot-wire outputs show the large structure to extend across the wind tunnel, but to contain spanwise irregularities. It is argued that these spanwise irregularities are produced by the pairing interactions between adjacent vortices.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 97 , Issue 4 , 29 April 1980 , pp. 771 - 781
Copyright
© 1980 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Browand, F. K. & Latigo, B. O. 1979 The growth of the two-dimensional mixing layer from a turbulent and non-turbulent boundary layer. Phys. Fluids 92, 1011–1019.Google Scholar
Brown, G. & Roshko, A. 1974 On density effects and large structure in turbulent mixing layers. J. Fluid Mech. 83, 641–671.Google Scholar
Chandrsuda, C., Mehta, R. D., Weir, A. D. & Bradshaw, P. 1978 Effects of free-stream turbulence on large structure in turbulent mixing layers. J. Fluid Mech. 85, 693–704.Google Scholar
Dimotakis, P. E. & Brown, G. 1976 The mixing layer at high Reynolds number: large structure dynamics and entrainment. J. Fluid Mech. 78, 535–560.Google Scholar
Kovasznay, L. S. G., Kibens, V. & Blackwelder, R. 1970 Large-scale motion in the inter-mittent region of a turbulent boundary layer. J. Fluid Mech. 41, 283–325.Google Scholar
Lamb, H. 1945 Hydrodynamics, pp. 224–229. New York: Dover.
Roshko, A. 1976 Structure of turbulent shear flows. A.I.A.A. J. 14, 1349–1357.Google Scholar
Wygnanski, I. & Fiedler, H. E. 1970 The two-dimensional mixing region. J. Fluid Mech. 41, 327–361.Google Scholar
Wygnanski, I., Oster, D., Fiedler, H. & Dziomba, B. 1979 On the perseverance of a quasi two-dimensional eddy-structure in a turbulent mixing layer. J. Fluid Mech. 92, 1–16.Google Scholar