Turbulence Characteristics of Open-Channel Flow with Bed Suction
Publication: Journal of Engineering Mechanics
Volume 133, Issue 12
Abstract
The influence of bed suction on the characteristics of turbulent open channel flow is studied in a laboratory flume using a two-component laser Doppler velocimeter. The experimental results show how bed suction significantly affects the mean flow properties, turbulence levels, and Reynolds stress distributions. The data reveal the presence of a more negative vertical (downward) velocity. The results also show how the horizontal and vertical turbulence intensities and Reynolds shear stresses respond to suction. All these properties are found to reduce with increasing relative suctions: decreasing more rapidly around the bed region than that near the free surface. In the downstream direction, the flow structure in the suction zone undergoes a process of rapid readjustment within a transitional region. Beyond this region, the turbulence flow structures asymptotes toward an “equilibrium” region.
Get full access to this article
View all available purchase options and get full access to this article.
References
Chen, X. W., and Chiew, Y.-M. (2004). “Velocity distribution of turbulent open-channel flow with bed suction.” J. Hydraul. Eng., 130(2), 140–148.
Cheng, N.-S., and Chiew, Y.-M. (1998a). “Modified logarithmic law for velocity distribution subjected to upward seepage.” J. Hydraul. Eng., 128(12), 1235–1241.
Cheng, N.-S., and Chiew, Y.-M. (1998b). “Turbulent open-channel flow with upward seepage.” J. Hydraul. Res., 36(3), 415–431.
Maclean, A. G. (1991). “Open channel velocity profiles over a zone of rapid infiltration.” J. Hydraul. Res., 29(1), 15–27.
Maclean, A. G., and Willetts, B. B. (1986). “Measurement of boundary shear stress in nonuniform open channel flow.” J. Hydraul. Res., 24(1), 39–51.
Nezu, I. (1977). “Turbulent structure in open-channel flows.” Doctoral dissertation, Dept. of Civil Engineering, Kyoto Univ., Kyoto, Japan (in Japanese).
Nezu, I., and Nakagawa, H. (1993). Turbulence in open-channel flows, IAHR Monograph, Balkema, Rotterdam, The Netherlands.
Prinos, P. (1995). “Bed-suction effects on structure of turbulent open-channel flow.” J. Hydraul. Eng., 121(5), 404–412.
Schlichting, H. (1979). Boundary-layers theory, McGraw-Hill, New York.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 133 • Issue 12 • December 2007
Pages: 1388 - 1393
Copyright
© 2007 ASCE.
History
Received: Oct 15, 2002
Accepted: Jun 13, 2007
Published online: Dec 1, 2007
Published in print: Dec 2007
Notes
Note. Associate Editor: Robert J. Martinuzzi
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.