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On flow separation and reattachment around a circular cylinder at critical Reynolds numbers

Published online by Cambridge University Press:  26 April 2006

H. Higuchi ,
H. J. Kim  and
C. Farell
H. Higuchi
Affiliation:
St Anthony Falls Hydraulic Laboratory, Department of Civil & Mineral Engineering, University of Minnesota, Minneapolis, MN 55414, USA
H. J. Kim
Affiliation:
Korea Advanced Institute of Science and Technology, Seoul, Korea
C. Farell
Affiliation:
St Anthony Falls Hydraulic Laboratory, Department of Civil & Mineral Engineering, University of Minnesota, Minneapolis, MN 55414, USA
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Abstract

An experimental investigation of the flow around smooth circular cylinders in the Reynolds number range 0.8 × 105 < Re < 2 × 105 is presented. Measured quantities include spectra, spanwise correlations and cross correlations of cylinder pressures and wake-velocity fluctuations, and low-frequency boundary-layer flow direction reversals near separation. The flow motion in the critical range is found to be characterized by intermittent, symmetric boundary-layer reattachments, occurring in cells with a well-defined spanwise structure, accompanying a significant decrease in drag coefficient and a weakening of the vortex shedding.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 200 , March 1989 , pp. 149 - 171
Copyright
© 1989 Cambridge University Press

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