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Experimental Study of Local Scour Around Elliptic and Semi-parabolic Groynes in Straight Channels
Ali Khairi Ibrahim,Hayder A.K. AL-Thamiry +1 more
- Vol. 25, Iss: 4, pp 105-116
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TLDR
In this article, a study was carried out to investigate local scour around curved groynes under different conditions including flow condition, average values of radius of curvature, spacing between groynes, width of groyne, number of groynes and shapes of shapes.Abstract:
This study was carried out to investigate local scour around curved groynes under different conditions including flow condition, average values of radius of curvature, spacing between groynes, width of groynes, number of groynes, and shapes of groynes. Laboratory works were achieved with 300 runs for elliptic and semi-parabolic groynes models. Three different widths of groynes were adopted as (7, 10, and 13 cm), as well as, using three different number of groyne, single, double and triple. Four different spacing between groynes of (1, 1.5, 2, and 2.5) times of width of groyne were used in the study. The average values of radius of curvature for all adopted shapes used was computed as an additional significant parameters. Dimensional analysis techniques and (MATLAB V.13) program were used to detect the two dimensionless formulas of maximum scour depth for elliptic and semiparabolic groynes. The results gave good determination coefficient of (99) % for both formulas. Generally, the elliptic groyne is the best case of all groynes because gives minimum scour depth, minimum volume of scour and transition of sediments.read more
Citations
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Investigations on the Impact of Using Elliptic Groynes on the Flow in Open Channels
TL;DR: In this paper, the authors presented a numerical simulation of the flow around elliptic groynes by using CFD software, where the flow was simulated in a flume with 4m long, 04m wide, and 1.75m high with a constant bed slope.
References
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Journal ArticleDOI
Local Scour Around Cylindrical Piers
TL;DR: In this paper, a review of literature on model and field data is presented, and the empirical data are compared with theoretical considerations, together with a set of design suggestions together with possibilities for protection against scour.
Journal ArticleDOI
Local Scour Associated with Angled Spur Dikes
TL;DR: In this article, a series of experiments were conducted in which the volume of the scour hole associated with model spur dikes was measured in a laboratory flume under clear-water overtopping flows.
Journal ArticleDOI
Flow Details near River Groynes: Experimental Investigation
M.F.M. Yossef,Huib J. de Vriend +1 more
TL;DR: In this paper, a fixed-bed flume for a schematized straight river reach with groynes on one side was used to study the dynamics of the flow near groynes.
Journal ArticleDOI
Local scour around spur-dikes
TL;DR: In this article, an empirical formula for the maximum depth of scour was derived and found to be identical in form to the regime equations of Lacey and Blench, and an experimental investigation was conducted to study the effects of upstream flow conditions, sediment characteristics, and spurdike's geometry on the maximum scour depth and scour pattern around a spur-dike.
Journal Article
Local scour around non-submerged bell mouth groin
Md. Jahir Uddin,M. M. Hossain +1 more
TL;DR: In this article, an experimental study was conducted in a 45.6m long and 2.45m wide laboratory water basin to investigate the local scour around a non-submerged bellmouth groin structure.
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