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Ripple formation on a particle bed sheared by a viscous liquid. Part 2. Oscillating flow

Published online by Cambridge University Press:  27 February 2006

F. CHARRU  and
E. J. HINCH
F. CHARRU
Affiliation:
IMFT, Allée C. Soula, 31400 Toulouse, France
E. J. HINCH
Affiliation:
Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, UK
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Abstract

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A new model for the erosion and deposition of particles, developed in Part 1, is now applied to oscillating flows to give an analytic expression for the growth rate. We find that ripples can grow in oscillating flows when they do not in steady flows of the same magnitude, this being due to a suppression in rapidly oscillating flows of the erosion by higher shear rates on the crests.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 550 , 10 March 2006 , pp. 123 - 137
Copyright
© 2006 Cambridge University Press