Hydraulics of free overfall in Δ-shaped channels

Dey, Subhasish ; Ravi Kumar, B. (2002) Hydraulics of free overfall in Δ-shaped channels Sadhana : Academy Proceedings in Engineering Sciences, 27 (3). pp. 353-363. ISSN 0256-2499

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Official URL: http://www.ias.ac.in/sadhana/Pdf2002Jun/Pe1005.pdf

Related URL: http://dx.doi.org/10.1007/BF02703656


In this paper, two methods are presented to analyse the free overfall in Δ -shaped (equilateral triangle-shaped) channels. First, the flow upstream of a free overfall from smooth horizontal or mildly sloping Δ -shaped channels is analysed theoretically to determine the end-depth-ratio (EDR), applying the momentum equation based on the Boussinesq approximation. Second, an alternate method for analysing free overfall in Δ -shaped channels is also presented where the flow over a free overfall in a Δ -shaped channel is simulated by that over a sharp-crested weir to calculate the EDR. The method of estimation of discharge from the known end depth is also presented for both the methods. These approaches eliminate the need of an experimentally determined pressure coefficient. Experiments are conducted to verify the results obtained from the present methods. Comparisons of the computed and experimental results are satisfactory.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Brink Depth; Equilateral Triangle Shaped Channels; End Depth; Free Overfall; Hydraulics; One-dimensional Flow; Open Channel Flow; Steady Flow
ID Code:79066
Deposited On:24 Jan 2012 07:31
Last Modified:18 May 2016 21:35

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