Research Article
Oct 1981
Length of Flow Separation over Dunes
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VIEW THE REPLYAuthor: Peter EngelAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 107, Issue 10
Abstract
Dimensional analysis was used to define the length of the flow saparation for the case of two-dimensional, uniform flow over dunes, which was expressed in terms of bed-form geometry and the sand size of the bed material. Experiments were conducted in a rectangular flume using artificial dunes and a flow visualization method to measure the flow separation length. When dunes are flat, length of the flow separation is affected by the sand-grain roughness. When dunes are steep, the length of the flow separation is due mainly to the bed-form geometry and is relatively constant. The reverse rectangular steps can be considered as dunes of infinite length, and the length of the flow separation for such steps will always be greater than that obtained for dunes of finite length.
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Published In
Journal of the Hydraulics Division
Volume 107 • Issue 10 • October 1981
Pages: 1133 - 1143
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Oct 1981
Published online: Feb 3, 2021
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Peter Engel
Research Engr., Environmental Hydr. Sect., Hydr. Div., National Water Research Inst., Canada Centre for Inland Waters, P.O. Box 5050, Burlington, Ontario, Canada, L7R 4A6
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.