Water Science and Engineering 2017, 10(3) 246-255 DOI:   https://doi.org/10.1016/j.wse.2017.10.001  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords
Three-dimensional simulation
Computational fluid dynamics
Submerged vanes
Dike
Side and vortex flow
Authors
PubMed

Simulation of flow pattern at rectangular lateral intake with different dike and submerged vane scenarios

Hojat Karami a,*, Saeed Farzin a, Mohammad Tavakol Sadrabadi b, Hasan Moazeni a

a Faculty of Civil Engineering, Semnan University, Semnan 351319111, Iran
b School of Water Sciences Engineering, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran

Abstract

A comprehensive understanding of the sediment behavior at the entrance of diversion channels requires complete knowledge of three-dimensional (3D) flow behavior around such structures. Dikes and submerged vanes are typical structures used to control sediment entrainment in the diversion channel. In this study, a 3D computational fluid dynamic (CFD) code was calibrated with experimental data and used to evaluate flow patterns, the diversion ratio of discharge, the strength of secondary flow, and dimensions of the vortex inside the channel in various dike and submerged vane installation scenarios. Results show that the diversion ratio of discharge in the diversion channel is dependent on the width of the flow separation plate in the main channel. A dike perpendicular to the flow with a narrowing ratio of 0.20 doubles the ratio of diverted discharge in addition to reducing suspended sediment input to the basin, compared with a no-dike situation, by creating the outer arch conditions. A further increase in the narrowing ratio decreases the diverted discharge. In addition, increasing the longitudinal distance between consecutive vanes ( ) increases the velocity gradient between the vanes and leads to a more severe erosion of the bed, near the vanes.

Keywords Three-dimensional simulation   Computational fluid dynamics   Submerged vanes   Dike   Side and vortex flow  
Received 2016-05-24 Revised 2017-03-16 Online: 2017-07-30 
DOI: https://doi.org/10.1016/j.wse.2017.10.001
Fund:
Corresponding Authors: Hkarami@semnan.ac.ir (Hojat Karami).
Email: Hkarami@semnan.ac.ir
About author:

References:

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