Initiation of Motion of Calcareous Sand
Publication: Journal of Hydraulic Engineering
Volume 130, Issue 5
Abstract
This paper examines the initiation of motion of four natural and five sieved calcareous sand samples in unidirectional flow. Flume experiments yield the sediment transport rate as a function of bed shear stress up to bed-form development. Reference-based criteria are supplemented by visual observations to determine the critical shear stress. The results are compared with published data for rounded and irregular particles in terms of the median sieve size and the corresponding nominal and equivalent diameters as functions of particle Reynolds number. The comparison shows that the critical shear stresses of the irregular particles are higher than the Shields curve in the hydraulically smooth flow regime and lower in the rough turbulent flow regime.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 130 • Issue 5 • May 2004
Pages: 467 - 472
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jul 15, 2002
Accepted: Oct 15, 2003
Published online: Apr 15, 2004
Published in print: May 2004
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