Water Surface at Change of Channel Curvature
Publication: Journal of Hydraulic Engineering
Volume 111, Issue 5
Abstract
In the study of flow in curved open channels, it is observed that a gradual transition from a flat to a superelevated water surface occurs when the curvature of the channel is abruptly changed. The length of this transition depends on the curvature, channel width and Froude number. An approximate analysis, based on the depth-averaged flow equations with friction neglected, is used to evaluate the water surface configuration and provide a simple expression for the transition length. Comparison of the predicted water surface configuration with a few preliminary experiments is also made, and the agreement is seen to be reasonable.
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References
1.
Kamiyama, S., “Two‐Dimensional Potential Theory on Flow Through Bends of Arbitrary Profile,” Report of the Institute of High Speed Mechanics, Tohuka, Univ., Vol. 18, No. 172, 1966, pp. 25–42.
2.
Leschziner, M. A., and Rodi, W., “Calculation of Strongly Curved Open Channel Fiow,” Journal of the Hydraulics Division, ASCE, Vol. 105, No. HY10, 1979, pp. 1297–1314.
3.
de Vriend, H. J., “Velocity Redistribution in Curved Rectangular Channels,” Journal of Fluid Mechanics, Vol. 107, 1981, pp. 423–439.
4.
Yen, C. L., and Yen, B. C., “Water Surface Configuration in Channel Bends,” Journal of the Hydraulics Division, ASCE, Vol. 97, No. HY2, 1971, pp. 303–321.
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Published In
Journal of Hydraulic Engineering
Volume 111 • Issue 5 • May 1985
Pages: 866 - 870
Copyright
Copyright © 1985 ASCE.
History
Published online: May 1, 1985
Published in print: May 1985
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