Abstract
Hydraulic jump is an extremely turbulent flow which implies the development of large-scale turbulence and energy dissipation. In the present study the characteristics of hydraulic jump, including sequent depth, relative length of the jump, and energy loss on rough bed with discontinuous roughness elements of lozenge shape over adverse slope have been investigated. Roughness elements are distributed in a staggered way with the density of 10.67%. Two different heights of roughness elements and two adverse slopes were considered. It was found that by increasing the height of roughness elements and steeping the adverse slope, the sequent depth ratio, and relative length of the jump decreased while the energy loss increased. Also, it should be noted that as the hydraulic jump on the adverse slope is unstable, the roughness elements have the effective role on stabilization of the jump on an adverse slope.
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