Proposed Similarity Law for Surface Velocity in Hydraulic Models
Publication: Journal of Hydraulic Engineering
Volume 118, Issue 9
Abstract
In this paper, a brief review is made to describe the situation and main problems of distorted hydraulic models. The concept is reaffirmed that the vertical distribution of velocity in a distorted hydraulic model is dissimilar to the prototype. For this reason, the measuring point of the vertical average velocity that is usually used cannot be directly employed. A similarity law for surface velocity is proposed, the factors affecting it are discussed theoretically, and the coefficients in the similarity scale are determined from field and laboratory data. An example of practical application is given. After using the proposed similarity law, the discrepancy of surface velocity of model to prototype decreased essentially. It is advantageous for hydraulic engineers using surface velocity to replace the vertical average value in physical models. It has been shown to be effective and satisfactory in our laboratory for hydraulic model studies with a large distortion. The similarity law proposed in this paper is considered to be used commonly.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Barthel, V., and Crookshank, N. L. (1987). “A hybrid model for the Senegal estuary.” Proc. of Coastal and Port Engineering in Developing Countries, China Ocean Press, 2, 1837–1851.
2.
Chien, N. (1957). Similarity laws of distorted river models with movable bed. Science Press, Beijing, China (in Chinese).
3.
Dou, G. (1956). “Determination of stability of fluvial rivers.” J. Hydr. Engrg., Water Resources and Electric Power Press, Beijing, China, 1, 17–32 (in Chinese).
4.
Dou, G. (1959). “On mechanics of turbulent flow and velocity distribution.” J. Hydr. Engrg., Water Resources and Electric Power Press, Beijing, China, 5, 49–66 (in Chinese).
5.
Funke, E. R., and Crookshank, N. L. (1978). “A hybrid model of the St. Lawrence River estuary.” Proc. of the 16th Conf. on Coastal Engineering, ASCE, New York, N.Y., 3, 2855–2869.
6.
Hudson, R. Y., Herman, F. A., Jr., Sager, R. A., Whalen, R. A., Koulegan, G. H., Chatham, L. E., Jr., and Hale, L. Z. (1979). “Coastal hydraulic models.” Special Report No. 5, U.S. Army Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir, Va.
7.
Kobus, H. (1980). Hydraulic modelling. German Association for Water Resources and Land Improvement, Pitman Books, Ltd., London, U.K.
8.
Li, C. (1981). River modelling. People's Communications Publishing House, Beijing, China (in Chinese).
9.
Prandtl, L., Oswatitsch, K., and Wieghardt, K. (1969). Führer durch die stromungslehre. Friedr. Vieweg + Sohn, Braunschweig, Germany (in German).
10.
Scheffner, N. W., Crosby, L. G., Bastian, D. F., Chamber, A. M., and Granot, M. A. (1981). “Verification of the Chesapeake Bay model.” Tech. Report HL‐81‐14, U.S. Army Corps of Engineers, Baltimore, Md.
11.
Yalin, M. S. (1971). Theory of hydraulic models. The Macmillan Press Ltd., London, United Kingdom.
12.
Yu, D., Lu, X., and Jin, C. (1988). “Design of a physical model for Qiantang estuary and its verification.” Proc. of the Sixth Congress of the Asian and Pacific Regional Division of the International Association for Hydraulic Research, Kyoto, Japan, 4, 313–318.
Information & Authors
Information
Published In
Copyright
Copyright © 1992 ASCE.
History
Published online: Sep 1, 1992
Published in print: Sep 1992
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.