We present the results of some experiments on the circular hydraulic jump in normal and superfluid liquid helium. The radius of the jump and the depth of the liquid outside the jump are measured through optical means. Although the scale of the apparatus is rather small, the location of the jump is found to be consistent with the assumption that the jump can be treated as a shock, if the surface...

Pure theoretical models seeking for the length of jump is extremely difficult (if not impossible). For this reason, empirical prediction equations are normally developed using statistical multiple line regression (MLR). These models may be satisfactory enough for few numbers of variables but may predict unrealistic values when many variables are involved. Fortunately, the recently developed com...

Forced hydraulic jump in a horizontal stilling basin with one and two continuous sills at the downstream end of an ogee standard weir was investigated. Experiments were completed on sills of five different heights which were fixed at two different distances from the toe of the weir. The main characteristics of the jump such as the sequent depth ratio, relative roller &#10length, and relative en...

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...

The water cushion depth of stilling basin with shallow-water cushion is a key factor that 13 affects the flow regime of hydraulic jump in the basin. However, the specific depth at which the 14 water cushion is considered as “shallow” has not be stated clearly for now, and only conceptual 15 description is provided. This paper attempts to specify the best water cushion depth based on the 16 flow...

We examine theoretically the spread of a jet impacting on circular disk and hydraulic jump viscoplastic fluid Herschel–Bulkley type. The depth-averaging approach is employed in supercritical region, subcritical flow assumed to be inertialess lubrication treated as shock, where balance mass momentum established radial direction, including effect surface tension across jump. show that, contrast N...