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Characteristics of Undular Hydraulic Jumps: Experiments and Analysis
journal contribution
posted on 2023-05-16, 11:05 authored by Montes, JS, Chanson, HThe writers measured velocity, pressure and energy distributions, wavelengths, and wave amplitudes along undular jumps in a smooth rectangular channel 0.25 m wide. In each case the upstream flow was a fully developed shear flow. Analysis of the data shows that the jump has strong three-dimensional features and that the aspect ratio of the channel is an important parameter. Energy dissipation on the centerline is far from negligible and is largely constrained to the reach between the start of the lateral shock waves and the first wave crest of the jump, in which the boundary layer develops under a strong adverse pressure gradient. A Boussinesq-type solution of the free-surface profile, velocity, and energy and pressure distributions is developed and compared with the data. Limitations of the two-dimensional analysis are discussed.
History
Publication title
Journal Of Hydraulic EngineeringVolume
124Pagination
192-205ISSN
0733-9429Department/School
School of EngineeringPublisher
ASCE (American Society of Civil Engineers)Place of publication
USARepository Status
- Restricted