Hostname: page-component-6bb9c88b65-vqtzn Total loading time: 0 Render date: 2025-07-25T19:58:38.490Z Has data issue: false hasContentIssue false
  • English
  • Français

On the visual growth of a turbulent mixing layer

Published online by Cambridge University Press:  19 April 2006

J. Jimenez
J. Jimenez
Affiliation:
IBM Scientific Center, Castellana 4, Madrid 1, Spain
Get access Rights & Permissions [Opens in a new window]

Abstract

Two models are discussed to account for the motion of the concentration interface in turbulent mixing layers. In the first one the interface is treated as a vortex sheet and its roll-up is studied. It is argued that this situation represents only the first stages of layer growth and another model is studied in detail in which a row of vortex cores entrains an essentially passive concentration interface with no vorticity. Both models give values of the spreading rate in approximate agreement with observations, and their relation is discussed.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 96 , Issue 3 , 13 February 1980 , pp. 447 - 460
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.)

Article purchase

Temporarily unavailable

References

Birkhoff, G. 1962 Helmholtz and Taylor instabilities. Proc. Symp. in App. Math. vol. XIII, pp. 55. Providence, R.I.: AMS.
Brown, G. L. & Roshko, A. 1974 On density effects and large structure in turbulent mixing layers. J. Fluid Mech. 64, 775–816.Google Scholar
Damms, S. M. & Küchemann, D. 1972 On a vortex sheet model for the mixing between parallel streams. Roy. Aircraft Establishment Tech. Rep. 72139.Google Scholar
Freymuth, P. 1966 On transition in a separated laminar boundary layer. J. Fluid Mech. 25, 683–704.Google Scholar
Hernan, M. A. & Jimenez, J. 1979 Automatic analysis of fluid flow pictures. Proc. 2nd Symp. Turbulent Shear Flows, London.
Jimenez, J. 1977 Numerical simulation of mixing layer vortices. In Structure and Mechanics of Turbulence, vol. I (ed. H. Fiedler). Lectures Notes in Physics, vol. 75. Springer.
Lamb, H. 1945 Hydrodynamics. Dover.
Moore, D. W. & Saffman, P. G. 1975 The density of organized vortices in a turbulent mixing layer. J. Fluid Mech. 69, 465–473.Google Scholar
Roshko, A. 1976 Structure of turbulent shear flows: A new look. A.I.A.A. Paper, 76–78.Google Scholar
Winant, C. D. & Browand, F. K. 1974 Vortex pairing: the mechanism of turbulent mixing-layer growth at moderate Reynolds numbers. J. Fluid Mech. 63, 237–255.Google Scholar