COMPUTATION CHEZY’S COEFFICIENT IN A SEMI-ELLIPTICAL PIPE
DOI:
https://doi.org/10.4314/jfas.v11i2.32Keywords:
(Semi-Elliptical Pipe, Chezy’s Coefficient, Uniform flow, Rough Model Method.)Abstract
In the hydraulic field, the Chezy’s flow resistance coefficient in canals and pipes is often chosen arbitrarily. This value is tabulated independently of the depth of the flow or hydraulic radius and even less of the Reynolds number. This coefficient is usually influenced by a number of parameters that must be defined and considered. The objective of this study is to examine, on the one hand, the variation of the Chezy’s flow resistance coefficient for a semi-elliptical pipe under the hypothesis of an uniform flow with free surface, and to determine on the other hand, the expressions which govern them. Further, it must search expression for Chezy’s with consideration of the geometric characteristics of the pipe and hydraulic flow. This study is based on the rough model method (RMM).
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References
[2] Herschel S. On the origin of the Chézy formula. Journal of the Association of Engineering Societies, 1897, 18,363–69.
[3] Lawrence D S L. Hydraulic resistance in overland flow during partial and marginal surface inundation: experimental observations and modeling. Water Resources Research, 2000, 36, 2381–2393.
[4] Achour B. Canal rectangulaire en charge et à surface libre. Editions Al-Djazair, 2014, p40.
[5] Henderson F M. Open channel flow. New York: Macmillan, 1966
[6] Hey R D. Flow Resistance in Gravel-Bed Rivers. Journal of the Hydraulics Division. American Society of Civil Engineers, 1979,105, 365-79.
[7] Swamee P K, Rathie P N. Journal of Hydraulic Research, 2004, Vol.42, No. 5, 543-549, doi: 10.1080/00221686.2004.9641223
[8] Swamee P K, Swamee N.Journal of Hydraulic Research,2008,46 (2), 277-281,doi:10.1080/00221686.2008.9521861
[9] Achour B. Calculdes conduites et canaux par la MMR – Conduites et canaux en charge, Larhyss Edition Capitale, 2007, Tome 1, pp62-66.
[10] Achour B, Bedjaoui A. Journal of Hydraulic Research, 2006, 44 (5),715-717,doi: 10.1080/00221686.2006.9521721
[11] Colebrook, C F. Turbulent flow in pipes with particular reference to the transition region between the smooth and rough pipe laws. Proceedings of the Institution of Civil Engineers,1939, 12, 393-422.
[12] Achour B, Bedjaoui A. Turbulent pipe-flow computation using the rough model method (RMM). J. Civil Eng. Sci., 2012,1 (1), 36-41.
[13] Achour B. The Open Civil Engineering Journal, 2015, 9, 187-195,doi: 10.2174/1874149501509010187
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