Investigations on the Impact of Using Elliptic Groynes on the Flow in Open Channels

Authors

  • Ahmed M. Hussein AL‏-‏Sarefi College of Engineering - University of Baghdad
  • Riyadh Z. Azzubaidi College of Engineering - University of Baghdad

DOI:

https://doi.org/10.31026/j.eng.2021.02.04

Keywords:

groynes, CFD, SST, river-banks protection

Abstract

This paper presents a numerical simulation of the flow around elliptic groynes by using CFD ‎software. The flow was simulated in a flume with 4m long, 0.4m wide, ‎and 0.175m ‎high ‎‎with a constant bed slope. Moreover, the first Groyne placed at 1m from the flow ‎‎inlet with a ‎constant the Groyne height of 10cm and a 1cm thickness, and the ‎width of Groynes equals ‎7cm‎. A submergence ratio of the elliptic Groynes of 75% was assumed, corresponding to a discharge of ‎0.0057‎m3/sec. The CFD ‎model showed a good ability to simulate the flow ‎around ‎Groynes with ‎ good accuracy. The results of ‎CFD software showed that when using double elliptic Groynes, the bed shear stress is decreased with the ‎increase in the spacing between Groynes, as well as and the best spacing between the double ‎elliptic Groynes is twice of the Groyne width. Moreover, the used number of Groynes has no ‎much ‎impact ‎on velocity and shear ‎stress values.

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Published

2021-02-01

How to Cite

AL‏-‏Sarefi, A. M. H. and Azzubaidi, R. Z. (2021) “Investigations on the Impact of Using Elliptic Groynes on the Flow in Open Channels”, Journal of Engineering, 27(2), pp. 44–58. doi: 10.31026/j.eng.2021.02.04.