HYDRAULIC CHARACTERISTICS OF SUBMERGED HYDRAULIC JUMPS IN A HORIZONTAL RECTANGULAR CHANNEL

Model for polygonal hydraulic jumps.

We propose a phenomenological model for the polygonal hydraulic jumps discovered by Ellegaard and co-workers [Nature (London) 392, 767 (1998); Nonlinearity 12, 1 (1999); Physica B 228, 1 (1996)], based on the known flow structure for the type-II hydraulic jumps with a "roller" (separation eddy) near the free surface in the jump region. The model consists of mass conservation and radial force ba...

Two-dimensional bubble clustering in hydraulic jumps

Hydraulic jumps at boundaries in rotating fluids

We consider three-dimensional hydraulic jumps (shocks) propagating along boundaries in rotating fluids. This study is motivated by earlier work (Fedorov & Melville 1995), which dealt with the evolution to breaking of nonlinear Kelvin waves. We obtain the jump relations and derive an evolution equation for the jump as it propagates along the boundary. It is shown that after some initial adjustme...

Analysis and Formulation of Hydraulic Jumps in Sloping Rectangular Closed Conduits

Hydraulic jumps formed in closed rectangular sloping conduits aree investigated experimentally. Both positive and negative slopes are considered. The results are analyzed in terms of the inlet Froude number, the bottom slope and the inflow depth ratio. The experiments are conducted in a laboratory flume. Nineteen models are tested. Ten model for positive slope and another ten models nine negati...

Hydraulic jumps: turbulence and air bubble entrainment

-A free-surface flow can change from a supercritical to subcritical flow with a strong dissipative phenomenon called a hydraulic jump. Herein the progress and development in turbulent hydraulic jumps are reviewed with a focus on hydraulic jumps operating at large Reynolds numbers typically encountered in natural streams and hydraulic structures. The key features of the turbulent hydraulic jumps...