Length for Uniform Flow Development in a Rough Laboratory Flume
Publication: Journal of Hydraulic Engineering
Volume 145, Issue 1
Abstract
Uniform flow is important for physical model studies because generalizing flow data is possible only if the collected data is from locations where the flow is uniform, i.e., the test section. Presented in this paper are results from a physical model study of the channel length required for uniform flow to develop in a rough open channel with fully turbulent flow (i.e., the uniform flow development length, ). The objective of this study was to develop a physically meaningful and parsimonious relationship for predicting . It is concluded that is proportional to flow depth and channel width, and inversely proportional to bed material size. Also, neither Froude’s nor Reynold’s number is significant for predicting in a rough open channel with fully turbulent flow.
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Acknowledgments
This study was supported by the STC program of the National Science Foundation via the National Center for Earth-surface Dynamics under agreement EAR-0120914 and is intended as a contribution in the area of stream restoration.
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Published In
Journal of Hydraulic Engineering
Volume 145 • Issue 1 • January 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Oct 30, 2017
Accepted: Jul 10, 2018
Published online: Nov 13, 2018
Published in print: Jan 1, 2019
Discussion open until: Apr 13, 2019
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