Energy Expenditure in Curved Open Channels
Publication: Journal of Hydraulic Engineering
Volume 109, Issue 7
Abstract
This paper describes linear partitioning of energy expenditure in curved open channels. An analytical method which predicts energy losses due to longitudinal resistance and transverse circulation is presented; predicted results are compared with measurements. The transverse energy loss is evaluated using the velocity field of transverse circulation which is implicitly dependent on the internal turbulent shear and boundary roughness; thus, direct evaluations of the shear and boundary losses are avoided. Transverse circulation is often referred to as secondary circulation as its velocity component is generally substantially lower than the longitudinal or primary velocity. Such is not the case for the energy expenditure. The loss due to transverse circulation may be of the same order of magnitude as the longitudinal loss at a higher depth to radius ratio or lower channel roughness, or both.
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Published In
Journal of Hydraulic Engineering
Volume 109 • Issue 7 • July 1983
Pages: 1012 - 1022
Copyright
Copyright © 1983 ASCE.
History
Published online: Jul 1, 1983
Published in print: Jul 1983
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