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Image processing of the near wakes of stationary and rotating cylinders

Published online by Cambridge University Press:  26 April 2006

J. Massons ,
X. Ruiz  and
F. Díaz
J. Massons
Affiliation:
Laboratori de Física Aplicada, Dept. Química, University of Barcelona, P. Imperial Tarraco, l, 43005 Tarragona, Catalunya, Spain.
X. Ruiz
Affiliation:
Laboratori de Física Aplicada, Dept. Química, University of Barcelona, P. Imperial Tarraco, l, 43005 Tarragona, Catalunya, Spain.
F. Díaz
Affiliation:
Laboratori de Física Aplicada, Dept. Química, University of Barcelona, P. Imperial Tarraco, l, 43005 Tarragona, Catalunya, Spain.
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Abstract

Statistical properties of the position of the turbulent/non-turbulent interface in the near wake of stationary and spinning cylinders have been measured for Re = 2000, using image processing techniques. The results include the first statistical moments, intermittency and burst-rate profiles, auto- and cross-correlation functions, auto- and cross-spectra and phase spectra. They indicate that the rotation of the cylinder causes substantial changes in the structure of the flow.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 204 , July 1989 , pp. 167 - 184
Copyright
© 1989 Cambridge University Press

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