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Showing 1 to 20 of 50 for “"Open-Channel Flow"”.
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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
… 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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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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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 analysis of subcritical open channel flow by the penalty function finite element method
Many free surface flow problems encountered in hydraulic engineering can be accurately analyzed by utilizing the depth-averaged equations of motion. A consequence of adopting this depth-averaged modeling approach is that closure approximations must be implemented to represent the so-called …
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An investigation of velocity bias with a three-component LDA in open channel flow
… the viscous layer of a fully developed turbulent open water flow at a Reynolds number of 14,766 based on the flow depth. The data collected at a relatively low data rate is analyzed using different correction methods including: straight forward arithmetical averaging, inverse velocity and transit …
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Investigation of the application of open channel flow concepts in support of wetland reservoir routing
… spatial occurrence of water in a wetland system. Flow, velocity, bed roughness and vegetation, size, shape, and depth are all important aspects of studying or designing any wetland. Measuring exactly how much water is being discharged from a wetland is quite difficult and for precise measurement, …
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Open-Channel Flow With Roughness Elements of Different Spanwise Aspect Ratios: Turbulence Structure and Numerical Modeling
… conditions the length scales governing the flow dynamics in the inner region of boundary layers are no longer determined by the flow itself (i.e. $\nu$/$u\sb*$ for smooth walls), but rather independently specified by the real dimensions of the elements. In particular, the ratio between the …
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Experimental study of flow and turbulence characteristics in open channel flow: A comparative analysis of adv data trimming methods
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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A comparative study of two unsteady one-dimensional open channel flow models: Full Equations Model (FEQ) and River Analysis System (HEC-RAS)
Made available in DSpace on 2016-11-10T17:49:16Z (GMT). No. of bitstreams: 2 ANCALLEREYES-THESIS-2016.pdf: 3655444 bytes, checksum: 385d4d0a582d06143f4a234615d4b796 (MD5) LICENSE.txt: 4216 bytes, checksum: 2841bd6314d7d46e50a381add01791a3 (MD5) Previous issue date: 2016-07-22
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LONGITUDINAL SOLUTE TRANSPORT IN OPEN-CHANNEL FLOW - A Numerical Simulation Study on Longitudinal Dispersion, Surface Storage Effects, Transverse Mixing, Uncertainties and Parameter-Transferring Problems
… e= Q/(Dt W) (where, Q is the average volumetric flow rate; Dt is an average transverse dispersion coefficient; W is the channel flow width), derived from non-dimensionalization of the governing equations of one of the most rigorous 2-dimansional (2D) (depth-averaged) model, Mike21, this work …
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Particle motion in the near bed region of a turbulent open channel flow: Implications for bedload transport by saltation and sediment entrainment into suspension
… particles in the near bed region of a turbulent open channel flow. Two different aspects of this phenomenon are examined, namely the mode of transport denoted as saltation, and the process of particle entrainment into suspension. The main approach followed is experimental, using visualization and …
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Dynamic Wave Simulation of Unsteady Open Channel and Surcharge Flows in Sewer Networks (saint-Venant Equations, Four-Point Implicit Finite Difference, Storm Sewer Drainage, Urban Hydrology)
… are traditionally designed to operate under open-channel flow conditions. However, it is not uncommon that under high flows some or all of the pipes in a sewer network may change from open-channel flow to surcharge flow. For surcharge flow in a sewer there exist two techniques of mathematical …
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Friction equation for uniform flow in channels of large relative roughness
… investigation of the roughness problem in open channel flow. A literature review is given on the previous research done on friction factors. It is done in chronological order, so that the historical development of the friction equation can be seen.
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Turbulent structures in smooth and rough open channel flows: effect of depth
… are performed to study the effect of the flow 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 …
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A WC-MPS Model for Viscous Free Surface Flows
… they will fail in the simulation of free surface flow problems due to the large deformation and fragmentation, and they suffer from some problems whose objects are a set of discrete physical particles (rather than a continuum). On the contrary, mesh-less particle methods (MPMs), or mesh-free …
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