Discussion of “Energy Dissipation and Turbulent Production in Weak Hydraulic Jumps” by E. Mignot and R. Cienfuegos

2011 ◽  
Vol 137 (8) ◽  
pp. 857-860 ◽  
Author(s):  
Martín Romagnoli ◽  
Carlos M. García ◽  
Raúl A. Lopardo
Keyword(s):  
Energy Dissipation ◽  
Hydraulic Jumps

Energy Dissipation and Turbulent Production in Weak Hydraulic Jumps

2010 ◽  
Vol 136 (2) ◽  
pp. 116-121 ◽  
Author(s):  
E. Mignot ◽  
R. Cienfuegos
Keyword(s):  
Energy Dissipation ◽  
Hydraulic Jumps

Closure to “Energy Dissipation and Turbulent Production in Weak Hydraulic Jumps” by E. Mignot and R. Cienfuegos

2011 ◽  
Vol 137 (8) ◽  
pp. 862-863
Author(s):  
Emmanuel Mignot ◽  
Yann Peltier ◽  
Rodrigo Cienfuegos
Keyword(s):  
Energy Dissipation ◽  
Hydraulic Jumps

scholarly journals Effect of roughness on sequent depth in hydraulic jumps over rough bed

2019 ◽  
Vol 71 (2) ◽  
pp. 105-111
Author(s):  
Arpan Arunrao Deshmukh ◽  
Naveen Sudharsan ◽  
Avinash D Vasudeo ◽  
Aniruddha Dattatraya Ghare
Keyword(s):  
Energy Dissipation ◽  
Kinetic Energy ◽  
Hydraulic Jump ◽  
Open Channel ◽  
Hydraulic Jumps ◽  
Open Channel Flows ◽  
Downstream Side ◽  
Rough Bed ◽  
Sequent Depth ◽  
Rough Beds

Hydraulic jump is an important phenomenon in open channel flows such as rivers and spillways. Hydraulic jump is mainly used for kinetic energy dissipation at the downstream side of a spillway with the assist of baffle blocks. It has been demonstrated that corrugated or rough beds show considerably more energy dissipation than smooth beds. The experimental research evaluating the effect of crushed stones on the hydraulic jump is presented in this paper. Five different-size sets of crushed stones were used. Results show that the effect of rough bed does not increase after a certain height of crushed stone is reached.

scholarly journals EXPERIMENTAL STUDY ON THE SIDE CHANNEL SPILLWAY AND ITS IMPACT ON THE JUMP, CROSS FLOW AND ENERGY DISSIPATION

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Djoko Legono ◽  
Roby Hambali ◽  
Denik Sri Krisnayanti
Keyword(s):  
Experimental Study ◽  
Energy Dissipation ◽  
Water Surface ◽  
Cross Flow ◽  
Side Channel ◽  
Hydraulic Jumps ◽  
Stilling Basin ◽  
Energy Dissipater ◽  
Design Discharge ◽  
The Cross

The utilization of the side channel spillway as the primary component of dam is generally due to the limitation of the available space to construct conventional spillway with design discharge capacity. Some impacts may only be identified through the hydraulic physical model study; these include the presence of the chaotic jumps at the downstream of the spillway crest, the cross flow on the steep channel, as well as the performance of the energy dissipation in the stilling basin. This paper presents the result of the experimental study of three-dimensional behaviour of flow over the entire components of the side channel spillway of Bener Dam, Indonesia. The main dam and its appurtenant components, i.e., the reservoir, the spillway crest, the spillway channel, and the energy dissipaters were built, and various discharges were introduced to study the hydraulic performance of the spillway crest, the stilling basin, the chute, and the energy dissipater. The observed data were collected and then analysed. The results show that firstly, some chaotic hydraulic jumps were found at the stilling basin at downstream spillway crest. These chaotic hydraulic jumps would produce significant vibration that may endanger the nearby structures.  Secondly, the presence of the cross flow along the steep channel downstream of the stilling basin may also need to be eliminated in such that its impact on the rise of water surface level does not create any objection. This may be carried out through the installation of baffles along the spillway channel bed. Thirdly, the presence of the hydraulic jumps at the energy dissipater basin under the design discharge has proven that the energy dissipater has performed well where local scour around the downstream structure was found to be not significant. However, to anticipate the raising of the water surface elevation at the energy dissipater basin, increasing the elevation of energy dissipater wall from +212.50 m to +215.00 m is highly recommended.

scholarly journals HYDRAULIC PARAMETERS OF THE BLOCK RAMP WITH RIDGE TYPE NOTCH: THE GRAJCAREK IN SZCZAWNICA, POLISH CARPATHIANS

2020 ◽  
Vol 19 (3) ◽  
pp. 43-58
Author(s):  
Karol Plesiński ◽  
◽  
Artur Radecki-Pawlik ◽  
Nadzieja Jurkowska ◽  
◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Numerical Modelling ◽  
Cross Sections ◽  
Water Movement ◽  
Field Research ◽  
Field Measurements ◽  
Hydraulic Jumps ◽  
The Stability ◽  
Hydrodynamic Data ◽  
Block Ramp

Aim of the study: The aim of this study is to analyze the hydrodynamic parameters in the area of one of the block ramp in the analyzed stream. Material and methods: The field research included geodetic measurements on the basis of which the longitudinal profile and cross-sections of the watercourse bed and structures were made. Numerical modelling of flood flows was also performed in the HEC-RAS program, from which hydrodynamic data were obtained. The data obtained from field measurements and numerical modelling were used to calculate the length of the energy dissipation basins of the structure and to determine the type of water movement using the Froude number. The calculations were performed for several variants. The real lengths of the energy dissipation basin were compared with the lengths of hydraulic jumps that are formed on them. Results and conclusions: The obtained results indicate that the length of the energy dissipation basin is too short because the hydraulic jumps go beyond them. As a result, a scour is formed below the structure, which in the event of further development may threaten the stability of the structure.

Sign in / Sign up

Export Citation Format

Share Document