Siphon Removal of Cohesionless Materials
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 131, Issue 3
Abstract
This paper presents the results of an experimental study of the scour created by a siphon flow through a vertical tube of diameter of 9.7 to in a cohesionless sand bed of approximately uniform size of . The position of the inlet of the siphon tube ranged from to relative to the surface of the sand bed and the velocity of flow through the tube varied from 0.34 to . Data from this and previous studies are used to show the radial extent of the scour hole and the maximum depth of scour depend primarily on the densimetric Froude number , where , is the gravitational acceleration, is the difference in density between the sediment and fluid, and is the density of the fluid. A theoretical analysis of the problem is used to further assess the data and it is found that viscous effects are also important to consider. The profile of the scour hole at equilibrium, for all tube positions, is found to be similar when the scour depth is measured relative to the tube inlet.
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Acknowledgments
The writers are thankful to R. Clark and L. Pop for helping to setting up the experimental arrangement and to the Univ. of Windsor and the Natural Sciences and Engineering Research Council of Canada for financial support to the second writer for this project. The writers also acknowledge the helpful comments of the reviewers.
References
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© 2005 ASCE.
History
Received: Apr 1, 2004
Accepted: Nov 19, 2004
Published online: May 1, 2005
Published in print: May 2005
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