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Development of finite-amplitude disturbances in Poiseuille flow

Published online by Cambridge University Press:  20 April 2006

V. V. Kozlov  and
M. P. Ramazanov
V. V. Kozlov
Affiliation:
Institute of Theoretical and Applied Mechanics, USSR Academy of Sciences, 630090, Novosibirsk
M. P. Ramazanov
Affiliation:
Institute of Theoretical and Applied Mechanics, USSR Academy of Sciences, 630090, Novosibirsk
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Abstract

The process of three-dimensional distortion of previously two-dimensional disturbances was investigated in a rectangular channel. For the first time the three-dimensional structures at the breakdown station of the two-dimensional wave were studied by flow visualization. It was shown that the structures have forms identical with Λ-shaped vortices in a boundary layer of the flat plate. The spanwise spacing of the Λ-shaped vortices is quite independent of the mean-flow velocity and of the frequency of artificial disturbances.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 147 , October 1984 , pp. 149 - 157
Copyright
© 1984 Cambridge University Press

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