Effect of Corrugated Bed on Hydraulic Jump Characteristic Using SPH Method
Publication: Journal of Hydraulic Engineering
Volume 139, Issue 2
Abstract
A hydraulic jump is a common phenomenon that can be observed in open channel flows such as rivers and spillways. It can cause damage of the downstream bed and bank of the channel due to the process of continuous erosion and degradation. In order to reduce the hydraulic jump destruction, the energy in the hydraulic jump must be dissipated as much as possible. One method to increase dissipation of energy is using a corrugated bed. In order to know the effect of a corrugated bed on the hydraulic jump, a smoothed particle hydrodynamics (SPH) model is applied to investigate the characteristics of hydraulic jumps in various corrugated beds. A variety of corrugated beds that are smooth, triangular, trapezoidal, and sinusoidal are considered. The opening of a gate is changed to adjust the hydraulic jump. The conjugate depth ratio, the jump length, the bottom shear stress distribution, and the energy dissipation are reported. The results of the present study are in a good agreement with previous studies. Energy dissipation is compared among corrugated beds and a smooth bed. It is found that the sinusoidal bed can dissipate more energy than other beds. As a result, corrugated beds can be used to enhance energy dissipation of hydraulic jump in the open channel. In general, the proposed SPH model is capable of simulating the effect of corrugated beds on hydraulic jump characteristics.
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Acknowledgments
The authors would like to express their gratitude for the support given by National Science Council Taiwan (Project No.: NSC 100-2212-E-011-163). The authors are grateful to Dr. David Lopez, Dr. Benedict Rogers, Prof. O.M. Faltinsen, Dr. A. Calogrossi, Dr. Rui Xu, and Dr. Songdong Shao for their helpful discussion as well.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 139 • Issue 2 • February 2013
Pages: 221 - 232
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 5, 2011
Accepted: Apr 25, 2012
Published online: Apr 28, 2012
Published in print: Feb 1, 2013
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