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Oscillatory flow over a cylinder resting on a plane boundary

Published online by Cambridge University Press:  26 September 2008

M. F. Wybrow
Affiliation:
School of Mathematics, University of East Anglia, Norwich, UK
N. Riley
Affiliation:
School of Mathematics, University of East Anglia, Norwich, UK

Abstract

Oscillatory flow over a circular cylinder, or part-cylinder, placed on a plane boundary, when the Strouhal and streaming Reynolds numbers are large, is considered. The solution is developed in matching inner and outer boundary layers. A steady streaming motion in the outer layer can lead to a net flow away from the cylinder along the plane boundary. A simple experiment substantiates this prediction, and the implications for bed-scouring are examined.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1996

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