Results 101 to 110 of about 296 (136)
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Sediment Concentration below Free Overfall
Journal of Hydraulic Engineering, 1994Timevarying sediment concentration exiting a plunge pool is analyzed by considering the effect of freeoverfall jet diffusion on sediment detachment and scour.
O. R. Stein, P. Y. Julien
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Hydraulics of Plane Free Overfall
Journal of Hydraulic Engineering, 1983The plane, free overfall is treated by using extended energy and momentum equations taking account of the streamline inclination and curvature. The end‐depth‐ratio is estimated by momentum considerations in the brink and the upstream sections. Distinction is made between pressure head and flow depth which coincide only for parallel, horizontal ...
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DISCHARGE PREDICTION AT FREE OVERFALLS
ISH Journal of Hydraulic Engineering, 2002(2002). DISCHARGE PREDICTION AT FREE OVERFALLS. ISH Journal of Hydraulic Engineering: Vol. 8, No. 1, pp. 69-71.
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Numerical Modeling of Free Overfall
Journal of Hydraulic Engineering, 2005Free overfall is treated by using two-dimensional steady potential flow theory. Based on the theory of the boundary value problem of analytical function and the substitution of variables we derive the boundary integral equations in the physical plane for solving the free overfall in a rectangular channel. A numerical iterative method has been developed
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Characteristics of free overfall for supercritical flows
Canadian Journal of Civil Engineering, 2007The characteristics of supercritical flow at a vertical drop in a rectangular channel are studied experimentally to obtain information that would be valuable to designers of hydraulic structures. The relationship between the ratio of brink depth to the depth of upstream supercritical flow (i.e., end-depth ratio) and the Froude number is determined ...
Nuray Denli Tokyay, Dilek Yildiz
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Pattern of Potential Flow in a Free Overfall
Journal of the Hydraulics Division, 1970A theory is presented to describe the two-dimensional flow of liquid in an open channel which terminates abruptly at a sharp drop. A dimensionless diagram expressing constancy of total head on the upper free surface and similar to the conventional specific-head versus depth and discharge versus depth diagrams is used to trace the course of the flow in ...
Theodor Strelkoff, Mohammad S. Moayeri
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Estimating Trajectory of Free Overfall Nappe
Journal of Hydraulic Engineering, 1999The upper surface profile of a rectangular free overfall is modeled using the free-fall parabolic equation. Empirical and semiempirical relationships for the unknown quantities in this equation are presented. It was found that the resulting simple and straightforward method adequately predicts the position of the upper nappe surface. A relationship for
Alastair C. Davis +2 more
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Roughness Effects on Rectangular Free Overfall
Journal of the Hydraulics Division, 1976For a rectangular free overfall, the end depth ratio (EDR) has been well connected with the main parameters using dimensional analysis. Using experimental results on three different roughnesses, it has been found that the EDR can be predicted from the curve Delleur, et al., for smooth channels, if the relative roughness k s /ydac (in which k s is the ...
Nallamuthu Rajaratnam +2 more
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Flow Measurement with Rectangular Free Overfall
Journal of Irrigation and Drainage Engineering, 1992Previous experimental works provide different values of the ratio between the end depth and the critical depth. Differences depend on the crosssection shape of the channel, the roughness of the channel, and the characteristics of the nappe (confined or free on the sides).
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Energy Loss At the Base of A Free Overfall
Transactions of the American Society of Civil Engineers, 1943Experimental studies were made of a free overfall with a view to obtaining information that would be of value to designers of hydraulic structures.
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