Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 123 for “"Open Channel"”.
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Open channel transitions with sub-critical flow
Inlet transitions with sub-critical flow from trapezoidal to rectangular sections are studied. The water depths range from 5 to 10 feet and the bottom widths range from 5 to 12.5 feet. Graphs were constructed to design these types of transitions. The behavior of a given transition with different …
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A finite element approach to open channel flow
… the propagation of hydraulic jumps and bores in open channels. It uses the basis function to weight the temporal terms and an asymmetric weighting function to weight the convection terms. The scheme has been improved with routines that both apply the asymmetric weighting function only in the …
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Shallow Water Wave Propagation in Open Channel Flow
Unsteady flow in open channels can be treated as propagation of shallow water waves in channel flow. It can be mathematically approximated by the Saint-Venant equations or by simplified wave approximations, including the kinematic wave, noninertia wave, gravity wave and quasi-steady dynamic wave …
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Application of evolutionary computation to open channel flow modelling
… techniques to two different aspects of open channel flow. The first part of the work is concerned with evaluating the ability of an evolutionary algorithm to provide insight and guidance into the correct magnitude and trend of the three parameters required in order to successfully apply …
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Initiation of Particle Movement in Turbulent Open Channel Flow
The objective of this thesis is to investigate the flow conditions that lead to coarse grain entrainment at near incipient motion conditions. Herein, a new conceptual approach is proposed, which in addition to the magnitude of hydrodynamic force or flow power, takes into account the duration of the …
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The application of implicit method to open-channel surges
… has been modified so as to make it applicable to open-channel shocks. The output of the computer program with θ = 0.6 compared favorably with the experimental result. A comparison was also made with other explicit schemes and a two step implicit scheme proposed by other investigators. The implicit …
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Numerical Simulation of an Open Channel Ultraviolet Waste-water Disinfection Reactor
The disinfection characteristics of an open channel ultra-violet (UV) wastewater disinfection reactor are investigated using a computational fluid dynamics (CFD) model. The model is based on the volume of fluid method to capture the water-air interface, the Lagrangian particle tracking method to …
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Open channel turbulent boundary layers and wall jets on rough surfaces
For many industrial and environmental flows, the momentum and convective heat transfer rates at the surface are determined by the turbulence structure in the near-wall region. Although many flows of practical interest occur on rough surfaces, our understanding and ability to predict rough wall …
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Effects of boundary roughness on turbulence in uniform open channel flow
… the process of sediment transport and mixing in open-channel flows. In this study, using highly controlled laboratory experiments, the effects of various bed configurations on turbulence, shear stresses, and other parameters have been analyzed and quantified and the results compared to previous …
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Three-Dimensional Analysis of Boundary Layers in Magnetohydrodynamic Open Channel Flow
The pumping of liquid metals through open channels by MHD effects can be applied to slag separation or continuous casting processes by the metallurgy industry. This study involves the analysis of the boundary layer structure of non-uniform open channel flow in a rectangular channel, with perfectly …
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OpenKV: LSM-tree-based key-value store for open-channel SSD
… be completely sorted. In this work, we propose OpenKV, a novel key-value store for open-channel SSD that achieves very low write amplification with good read performance. We propose a design with partially sorted levels with lazy compaction to reduce write amplification, and we have designed a …
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Turbulent structures in smooth and rough open channel flows: effect of depth
… on turbulent structures in smooth and rough bed open channel flow. When the rough bed is introduced in the shallow flow, the local turbulence near the roughness element intensifies and becomes highly heterogeneous. The model roughness under study consists of a train of two dimensional square ribs …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Analytical and Numerical Models for Velocity Profile in Vegetated Open-Channel Flows
The presence of vegetation in open channel flow has a significant influence on flow resistance, turbulence structures and sediment transport. This study will evaluate flow resistance and scale velocity profile in depth limited flow conditions, specifically investigating the impact of vegetation on …
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Understanding longitudinal ADCP measurements to determine water velocities for open channel flow
… standard of practice of measuring velocities in open channels relies on the historically proven methodology that was primarily focused on accurately determining the discharge of streams and rivers. The traditional standard of practice relies on time-averaged stationary measurements and transect …
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Numerical investigations of flow behavior and energy losses in open channel junctions
Understanding the behavior of combining flows in open-channel junction is of interest in environmental and hydraulic engineering. The complexity of the junction flow problem stems from flow mixing, secondary circulation, post-confluence flow separation, contraction and backwater effects. These …
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