Effect of Corrugated Rough Bed Channels on Sediment Transport Processes
Journal of Water Resources and Ocean Science
Volume 5, Issue 6, December 2016, Pages: 114-121
Received: Jan. 1, 2017; Accepted: Jan. 13, 2017; Published: Feb. 3, 2017
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Author
Mohamed Gamal Abdalla, Irrigation and Hydraulics Dept., Faculty of Engineering, Mansoura University, Mansoura, Egypt
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Abstract
In the present research, the effect rough corrugated bed channels on the sediment transport and of the flow passes is studied. Hypothetically, four scenarios of bed cases are tested. In the first case, using large eddy simulation, LES, an investigation of smooth bed is performed for ReT equals 395 (number of Reynolds calculated using the mean friction velocities at wall). The other three corrugated sinusoidal bed shape cases are assumed with different amplitudes and constant wavelengths. An eddy viscosity model which is adapted to wall is applied in this research; while the subgrid scale quantity is depend on the hypothesis gradient. A comparison between data of Cherukat et al. [5] obtained from Direct Numerical Simulation, DNS, and the data measured by Hudson et al. [11] with the corresponding computed flow is done. Then, wavy sinusoidal bed shape case is considered. From this study, it was found that the flow is affect strongly by the bed corrugations and the sediment transport is more sensitive for the larger heights of bed corrugations. Also, it is proved that the Rouse theory could be applied clearly in outer zone of the corrugated bed. It is explained generally in this paper that the profiles of turbulent Schmidt number are not affected by the height of corrugation.
Keywords
LES, Sediment Transport, Numerical Modeling, Rough Bed
To cite this article
Mohamed Gamal Abdalla, Effect of Corrugated Rough Bed Channels on Sediment Transport Processes, Journal of Water Resources and Ocean Science. Vol. 5, No. 6, 2016, pp. 114-121. doi: 10.11648/j.wros.20160506.16
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Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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