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• W2900694821 abstract "Urban flood caused by storm-water runoff has been problematic for many regions. There is a need to improve the design and hydraulic performance of storm sewer-pipes, which will help reduce the impact of urban flood. Such a need has motivated the current study. This paper investigates the flow behaviour in a circular pipe of steep slope, in which supercritical flow descends the steep terrain and forms a hydraulic jump under control acting downstream. So far, the jump behaviour and resultant flow choking in a circular pipe are poorly understood. This paper formulates the problem of the hydraulic jump in a circular pipe of slope on the basis of the momentum principle and solves it by using iterative methods. The solutions include the filling ratio and flow field downstream of an undular jump and a direct jump. For the first time, the Froude number’s dependence on the pipe slope has been quantified. For a given slope, it is possible to have two different filling ratios (or equivalently discharges) that associate with the same Froude number value. This paper reports detailed results of the initial versus sequent depth of the hydraulic jumps and quantitatively delineates the slope-filling ratio space between flow-choking and choking-free zones. For the design of storm sewers in a hilly area, it is necessary to correct the current design guidelines, which rely mostly on the uniform flow theory and suggest filling ratios as high as 85%. The corrections are either decreasing the filling ratio or increasing the pipe diameter to achieve choking-free flow in a circular pipe." @default.
• W2900694821 created "2018-11-29" @default.
• W2900694821 creator A5004200310 @default.
• W2900694821 creator A5084888732 @default.
• W2900694821 date "2018-11-16" @default.
• W2900694821 modified "2023-09-27" @default.
• W2900694821 title "Hydraulic Jump and Resultant Flow Choking in a Circular Sewer Pipe of Steep Slope" @default.
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• W2900694821 doi "https://doi.org/10.3390/w10111674" @default.
• W2900694821 hasPublicationYear "2018" @default.
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