Internal Flow in Hydraulic Jumps
Publication: Journal of Hydraulic Engineering
Volume 109, Issue 5
Abstract
The hydraulic jump has been extensively studied using physical models; however, very little data are available for the internal flow in prototype hydraulic jump stilling basins. A mathematical' model has been developed to help in the prediction of prototype performance from physical models. The technique used here is an extension of the strip integral method of R. Narayanan. The strip integral method uses velocity shape functions to permit the partial integration of the equations of motion. A Gaussian velocity distribution is used in the mixing zone and the power law is used in the inner layer. The mathematical model includes the bed shear, turbulent shear, the potential core, entrained air, centrifugal force and turbulence pressure. The model gives a fairly good prediction of the jump length, roller length, velocity distribution, water surface and pressure at the bed. The prediction of the growth of the boundary layer was not very good. The model indicated that the main effect of entrained air is the bulking of flow. The effects of centrifugal forces and turbulence pressures increase as and start to become significant for
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Published In
Journal of Hydraulic Engineering
Volume 109 • Issue 5 • May 1983
Pages: 684 - 701
Copyright
Copyright © 1983 ASCE.
History
Published online: May 1, 1983
Published in print: May 1983
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