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Start Over Descriptor "gravity wave model" Topic image processing technology
4 results on '"gravity wave model"'

1. Advances in Hydraulics and Hydroinformatics Volume 2.

Author

Zhou, Jianguo, Borthwick, Alistair, Peng, Yong, Zhang, Jianmin, and Zhou, Jianguo

Subjects
History of engineering & technology, 3D confined wall jet, BSTEM model, Bathy-supp, CFD, CFD-DEM coupling, DEM, FGP (flaring gate pier), Froude number, Gaussian distribution, HEC-RAS controller, LES-VOF method, Ningxia-Inner Mongolia, PIV, Sichuan province, TOPSIS method, Tarim Basin, U-shaped channel, Y-shaped confluence channel, Yellow River, abutment, aerated flow, air bubble chord length, air bubble frequency, air concentration, application depth, artificial ventilation, automation of flow modeling, backward-facing step, best depth, breaking wave, bridge piers, bridge scour, cavitation bubble, central angle of step, chute aerator, clogging, coherent vortex structure, collapse near a wall, collision in air, consistent particle method, dam-break flood, decay rate, desert-oasis areas, discharge coefficient, double cavitation bubble, drag force, drip irrigation, dry season, embankment weir, energy conversion rate, energy dissipation, evolution of precipitation, experiment, experimental model, experimental study, finite crest length weir, flood &amp, floods, flow division, flow property, flow region, flow-induced vibration, fluctuating pressure, flushing, fluvial acoustic tomography, free shear layer, free surface flow, free surface measurement, gate-opening modes, gravity wave model, high-speed photography, hydraulic characteristics, hydraulic jump, hydrocyclone, hydrodynamic modelling, hydrodynamic performance, hyporheic exchange, image processing technology, impact pressure, influencing factors, information entropy theory, jet trajectory, k-ε model, large eddy simulation, lattice Boltzmann method, linearly moved irrigation system, longitudinal velocity, mean flow, micro-jet, model simulation, moving speed, multi-horizontal-submerged jets, multiple bubble collapse, near-field vibration, non-submerged rigid vegetation, numerical analysis, numerical simulation, offset jet, open channel bend, optical motion capturing, orthogonal tests, overtopping flow, parallel cavitation, particle image velocimetry, particle shape, particle size, particle size distribution, phase difference, physical hydraulic modeling, plane gate, plunge pool, pool weir, pooled stepped spillway, potential core, pressure flow, pressure wave energy, pseudopotential lattice Boltzmann model, python scripting, radius-to-width ratio, rainfall intensity distribution, river bathymetry, river flow modeling, riverbank collapse, scour and velocity field, secondary flow, sediment, sediment transport, sediment transport simulation, sediments, sensitivity analysis, separation and reattachment, shallow lake, ski-jump flow, slope coefficient, sloshing, solitary wave, spillway bottom, spillway outlet, stepped dropshaft, stilling basin with shallow-water cushion (SBSWC), subcritical flow, submerged breakwater, submerged flow, submerged jets, surface-piercing propeller, surface−groundwater flow process, synchronized PIV, tank test, three-dimensional aerator, tidal channel junction, tidal discharge, tilt distribution cavitation, trajectory line, transforming mechanism, trapezoidal cross-section, turbulence, turbulent kinetic energy, two water jets, uniformity coefficient, velocity distribution, vortex, vortical evolution, water and sediment separation, water-saving irrigation development level, wave gauge, wavelet analysis, wetland
Abstract

Summary: This Special Issue reports on recent research trends in hydraulics, hydrodynamics, and hydroinformatics, and their novel applications in practical engineering. The Issue covers a wide range of topics, including open channel flows, sediment transport dynamics, two-phase flows, flow-induced vibration and water quality. The collected papers provide insight into new developments in physical, mathematical, and numerical modelling of important problems in hydraulics and hydroinformatics, and include demonstrations of the application of such models in water resources engineering.

2. Assessing the Analytical Solution of One-Dimensional Gravity Wave Model Equations Using Dam-Break Experimental Measurements

Author

Wenjun Liu, Bo Wang, Yunliang Chen, Chao Wu, and Xin Liu

Subjects
gravity wave model, dam-break flood, image processing technology, experimental study, Hydraulic engineering, TC1-978, Water supply for domestic and industrial purposes, TD201-500
Abstract

The one-dimensional gravity wave model (GWM) is the result of ignoring the convection term in the Saint-Venant Equations (SVEs), and has the characteristics of fast numerical calculation and low stability requirements. To study its performances and limitations in 1D dam-break flood, this paper verifies the model using a dam-break experiment. The experiment was carried out in a large-scale flume with depth ratios (initial downstream water depth divided by upstream water depth) divided into 0 and 0.1~0.4. The data were collected by image processing technology, and the hydraulic parameters, such as water depth, flow discharge, and wave velocity, were selected for comparison. The experimental results show that the 1D GWM performs an area with constant hydraulic parameters, which is quite different from the experimental results in the dry downstream case. For a depth ratio of 0.1, the second weak discontinuity point, which is connected to the steady zone in the 1D GWM, moves upstream, which is contrary to the experimental situation. For depth ratios of 0.2~0.4, the moving velocity of the second weak discontinuity point is faster than the experimental value, while the velocity of the shock wave is slower. However, as the water depth ratio increases, the hydraulic parameters calculated by 1D GWM in the steady zone gradually approach the experimental value.

Published
2018
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3. Assessing the Analytical Solution of One-Dimensional Gravity Wave Model Equations Using Dam-Break Experimental Measurements

Author

Chao Wu, Xin Liu, Wenjun Liu, Bo Wang, and Yunliang Chen

Subjects
Shock wave, Convection, lcsh:TD201-500, lcsh:Hydraulic engineering, gravity wave model, 0208 environmental biotechnology, Geography, Planning and Development, Flow (psychology), 02 engineering and technology, Mechanics, Aquatic Science, Biochemistry, Stability (probability), experimental study, 020801 environmental engineering, Flume, Discontinuity (linguistics), lcsh:Water supply for domestic and industrial purposes, lcsh:TC1-978, image processing technology, Gravity wave, Constant (mathematics), dam-break flood, Geology, Water Science and Technology
Abstract

The one-dimensional gravity wave model (GWM) is the result of ignoring the convection term in the Saint-Venant Equations (SVEs), and has the characteristics of fast numerical calculation and low stability requirements. To study its performances and limitations in 1D dam-break flood, this paper verifies the model using a dam-break experiment. The experiment was carried out in a large-scale flume with depth ratios (initial downstream water depth divided by upstream water depth) divided into 0 and 0.1~0.4. The data were collected by image processing technology, and the hydraulic parameters, such as water depth, flow discharge, and wave velocity, were selected for comparison. The experimental results show that the 1D GWM performs an area with constant hydraulic parameters, which is quite different from the experimental results in the dry downstream case. For a depth ratio of 0.1, the second weak discontinuity point, which is connected to the steady zone in the 1D GWM, moves upstream, which is contrary to the experimental situation. For depth ratios of 0.2~0.4, the moving velocity of the second weak discontinuity point is faster than the experimental value, while the velocity of the shock wave is slower. However, as the water depth ratio increases, the hydraulic parameters calculated by 1D GWM in the steady zone gradually approach the experimental value.

Published
2018
Full Text
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4. Assessing the Analytical Solution of One-Dimensional Gravity Wave Model Equations Using Dam-Break Experimental Measurements.

Author

Liu, Wenjun, Wang, Bo, Chen, Yunliang, Wu, Chao, and Liu, Xin

Subjects
FLOODS, WATER depth, IMAGE processing, HYDRAULICS, FLUID flow
Abstract

The one-dimensional gravity wave model (GWM) is the result of ignoring the convection term in the Saint-Venant Equations (SVEs), and has the characteristics of fast numerical calculation and low stability requirements. To study its performances and limitations in 1D dam-break flood, this paper verifies the model using a dam-break experiment. The experiment was carried out in a large-scale flume with depth ratios (initial downstream water depth divided by upstream water depth) divided into 0 and 0.1~0.4. The data were collected by image processing technology, and the hydraulic parameters, such as water depth, flow discharge, and wave velocity, were selected for comparison. The experimental results show that the 1D GWM performs an area with constant hydraulic parameters, which is quite different from the experimental results in the dry downstream case. For a depth ratio of 0.1, the second weak discontinuity point, which is connected to the steady zone in the 1D GWM, moves upstream, which is contrary to the experimental situation. For depth ratios of 0.2~0.4, the moving velocity of the second weak discontinuity point is faster than the experimental value, while the velocity of the shock wave is slower. However, as the water depth ratio increases, the hydraulic parameters calculated by 1D GWM in the steady zone gradually approach the experimental value. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

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