Results 251 to 260 of about 4,665 (305)
Some of the next articles are maybe not open access.
Journal of Fluid Mechanics, 1981
The circular hydraulic jump commonly forms on a horizontal plate struck by a vertical jet of liquid. New observations of this phenomenon are described. A previously unreported instability of the jump is examined. This is shown to arise when the local Reynolds number R j just ahead of the jump exceeds a critical value of 147.
A. D. D. Craik +3 more
openaire +1 more source
The circular hydraulic jump commonly forms on a horizontal plate struck by a vertical jet of liquid. New observations of this phenomenon are described. A previously unreported instability of the jump is examined. This is shown to arise when the local Reynolds number R j just ahead of the jump exceeds a critical value of 147.
A. D. D. Craik +3 more
openaire +1 more source
Journal of the Hydraulics Division, 1963
A definition sketch is proposed for the submerged hydraulic jump with the introduction of a submergence factor. Theoretical and empirical equations have been developed for the prominent flow parameters. The energy loss in the submerged jump has been shown to be considerably less than that in the corresponding free jump for higher submergences.
N. S. Govinda Rao, N. Rajaratnam
openaire +1 more source
A definition sketch is proposed for the submerged hydraulic jump with the introduction of a submergence factor. Theoretical and empirical equations have been developed for the prominent flow parameters. The energy loss in the submerged jump has been shown to be considerably less than that in the corresponding free jump for higher submergences.
N. S. Govinda Rao, N. Rajaratnam
openaire +1 more source
Journal of the Hydraulics Division, 1968
A generalized water-surface profile is presented for hydraulic jumps formed in smooth and horizontal rectangular channels. The vertical scale is equal to 0.75 times the height of the jump, and the dimensionless horizontal scale is related to the supercritical Froude number.
Nallamuthu Rajaratnam +1 more
openaire +1 more source
A generalized water-surface profile is presented for hydraulic jumps formed in smooth and horizontal rectangular channels. The vertical scale is equal to 0.75 times the height of the jump, and the dimensionless horizontal scale is related to the supercritical Froude number.
Nallamuthu Rajaratnam +1 more
openaire +1 more source
Journal of Hydraulic Engineering, 2005
Ski jumps are a major element of each dam spillway because these are the only structures able to accomplish satisfactory energy dissipation for takeoff velocities in excess of some 20 m / s. This research aims to add to several hydraulic problems with ski jumps that have not yet been systematically solved so far.
Heller, Valentine +2 more
openaire +3 more sources
Ski jumps are a major element of each dam spillway because these are the only structures able to accomplish satisfactory energy dissipation for takeoff velocities in excess of some 20 m / s. This research aims to add to several hydraulic problems with ski jumps that have not yet been systematically solved so far.
Heller, Valentine +2 more
openaire +3 more sources
Journal of the Hydraulics Division, 1979
Radial hydraulic jump occurs in a stilling basin with diverging side walls. Experimental data is used to obtain the free-surface profiles and the floor-pressure profiles within the diverging basin. These profiles are used to develop generalized equations for the effective side wall forces for Froude numbers from 2 to 10.
Abdelkawi M. Khalifa +1 more
openaire +1 more source
Radial hydraulic jump occurs in a stilling basin with diverging side walls. Experimental data is used to obtain the free-surface profiles and the floor-pressure profiles within the diverging basin. These profiles are used to develop generalized equations for the effective side wall forces for Froude numbers from 2 to 10.
Abdelkawi M. Khalifa +1 more
openaire +1 more source
Journal of the Hydraulics Division, 1976
A simple theory is developed whereby an expression for the length of the classical hydraulic jump is obtained. The theory is based on the postulate that the roller region of the jump is composed of a chain of energy containing eddies. The theoretical expression is compared with existing experimental data.
openaire +1 more source
A simple theory is developed whereby an expression for the length of the classical hydraulic jump is obtained. The theory is based on the postulate that the roller region of the jump is composed of a chain of energy containing eddies. The theoretical expression is compared with existing experimental data.
openaire +1 more source
Journal of Hydraulic Engineering, 1983
A predictive mathematical model of a circular hydraulic jump fountain display is presented. Momentum conservation, assuming a linear jump profile, is applied to obtain an equation for the sequent depth ratio for the jump. Assuming the jump length ratio is constant, the model is used to predict the relationship between jet thickness at source, jump ...
John D. Lawson, Brett C. Phillips
openaire +1 more source
A predictive mathematical model of a circular hydraulic jump fountain display is presented. Momentum conservation, assuming a linear jump profile, is applied to obtain an equation for the sequent depth ratio for the jump. Assuming the jump length ratio is constant, the model is used to predict the relationship between jet thickness at source, jump ...
John D. Lawson, Brett C. Phillips
openaire +1 more source
Journal of the Hydraulics Division, 1971
It has been shown that the existing definitions of the efficiency of hydraulic jump do not furnish a correct picture of the physical phenomenon. A more rational definition of the efficiency of hydraulic jump on a horizontal floor in a rectangular channel is given by the ratio of the energy actually dissipated in the jump to that required to be ...
Satya P. Garg, Hari R. Sharma
openaire +1 more source
It has been shown that the existing definitions of the efficiency of hydraulic jump do not furnish a correct picture of the physical phenomenon. A more rational definition of the efficiency of hydraulic jump on a horizontal floor in a rectangular channel is given by the ratio of the energy actually dissipated in the jump to that required to be ...
Satya P. Garg, Hari R. Sharma
openaire +1 more source
On the circular hydraulic jump
American Journal of Physics, 1999We study both experimentally and theoretically the classical problem of the circular hydraulic jump. By means of elementary hydrodynamics we investigate the scaling laws governing the position of the hydraulic jump and compare our predictions with experimental data.
Y. Brechet, Z. Néda
openaire +1 more source
Journal of Fluid Mechanics, 2009
We present a study of hydraulic jumps with flow predominantly in one direction, created either by confining the flow to a narrow channel with parallel walls or by providing an inflow in the form of a narrow sheet. In the channel flow, we find a linear height profile upstream of the jump as expected for a supercritical one-dimensional boundary layer ...
Bonn, D., Andersen, A., Bohr, T.
openaire +4 more sources
We present a study of hydraulic jumps with flow predominantly in one direction, created either by confining the flow to a narrow channel with parallel walls or by providing an inflow in the form of a narrow sheet. In the channel flow, we find a linear height profile upstream of the jump as expected for a supercritical one-dimensional boundary layer ...
Bonn, D., Andersen, A., Bohr, T.
openaire +4 more sources