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Dissertations / Theses on the topic 'Open channel'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Hopton, Stephen. "Modelling open channel flow." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11594/.

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The study of open channel flow and dam breaking is not a new topic in computational fluid dynamics. However it has only recently started to gain significant attention from researchers using meshless methods, i.e. numerical modelling techniques which do not rely on the use of a mesh to discretise the domain. The research presented here is an attempt to use the meshless method known as smoothed particle hydrodynamics (SPH) to simulate the flow of water down a channel. Hydra, a pre-existing SPH code designed originally for astrophysical simulations, was converted to simulate water flow and then a

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2

Delis, Anargiros. "Computational modelling of open channel flow." Thesis, University of the West of England, Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244309.

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3

Moores, Andrew. "Solute mixing in open channel flow." Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/686.

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4

Shrestha, Purushottam. "Steady flow in steep open channel systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0026/MQ31403.pdf.

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5

Dickman, Brian Daniel. "Large scale roughness in open channel flow." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/22953.

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6

Legono, D. "Behaviour of flow in open channel bends." Thesis, City University London, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375820.

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7

Daish, N. C. "Shear dispersion problems in open-channel flows." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372648.

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8

Bayat, David, and Fabian Grönvik. "Demonstration station for open water channel flow." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276582.

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Once a year an event is being held at the fluid physics lab at KTH. One of the main purposes of this event is to awaken an interest in the visiting students from other universities, by demonstrating fluid physics phenomena. Showing the transition from laminar to turbulent flow in an open water channel is one of the demonstrations. This will give the students a feel for the theoretical Reynolds number. The existing water table used for this purpose was lacking in some areas. The purpose of this project is to construct, design and test a rig for openwater channel flow which can be used for the e

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9

Arshad, Arslan. "Flow characteristics of narrow vegetated open channels." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2023. https://ro.ecu.edu.au/theses/2649.

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Vegetation offers higher resistance to the flow as compared to the bed of the channel causing the rise in water level. This idea has been proposed by numerous studies to be used in the channels with low flows to raise the water level enabling these channels useful for navigation and transportation. Raising the water levels artificially comes with challenges like the change in the aspect ratio (width to depth ratio, b/H). Generally, open channels experience a dip near the surface when the water level is increased, and the b/H becomes lower than a typical value of 5. The effect of dip near the s

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10

McClymont, David W. "Exploring open channel block of the NMDA receptor." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/12996/.

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The G1uN3 subunits of the NMDA receptor are thought to reduce the Ca 2+ permeability and Mg2+ sensitivity of NMDA receptors. cRNA for rat NMDA receptor subunits were injected into Xenopus oocytes and responses were recorded using two electrode voltage clamp at -100, -75 and -50 mV. G1uN1-1a/2A, GluN1-1a/2A/3A and G1uN1-1a/2A/3B containing receptors were characterised using Mgz+, memantine, philanthotoxin-343, methoctramine and MK-801. IC50 values were calculated and generally showed significant increases between those containing G1uN1-1a/2A/3 subunits and G1uN1-1a/2A, while those with G1uN3B w

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11

Roberts, Matthew Vincent Taylor. "Flow dynamics at open channel confluent-meander bends." Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414170.

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12

MacDonald, Ian. "Analysis and computation of steady open channel flow." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336664.

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13

Stewart, Mark Thomas. "Turbulence structure of rough-bed open-channel flow." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=210848.

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Open-channel flows are ubiquitous in nature and play a central role in many hydraulic engineering problems. This flow type occurs almost exclusively under fully-rough turbulent conditions and it is not uncommon for the relative submergence of these flows to be low. Despite this, most theory has so far been developed for smooth wall flows or rough-bed flows at high submergence while its applicability at low relative submergence remains questionable. This thesis therefore aims to contribute towards an improved understanding of turbulence structure in rough-bed open-channel flow at low to interme

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14

Boxall, Joseph B. "Dispersion of solutes in sinuous open channel flows." Thesis, University of Sheffield, 2000. http://etheses.whiterose.ac.uk/14803/.

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The research undertaken for this Ph.D. thesis concerns the dispersion of solutes in sinuous open channel flows. The aim of the work is to address the void in knowledge and understanding of mixing and transport processes in natural watercourses. The influences of plan form curvature and non-uniform cross sectional shape on transverse and longitudinal mixing are specifically addressed. Experimental work was undertaken on the Flood Channel Facility at HR Wallingford Ltd. This involved creating a pseudo natural sand channel within the concrete meander plan form of the facility, and then stabilisin

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15

Aya, Shirou. "Longitudinal and Transverse Mixing in Open-Channel Flows." Kyoto University, 1991. http://hdl.handle.net/2433/74583.

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16

Burger, Johannes Hendrik. "Non-Newtonian open channel flow: the effect of shape." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1296.

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Thesis submitted in fulfilment of the requirements for the degree Doctor of Technology: Mechanical Engineering in the Faculty of Engineering at the Cape Peninsula University of Technology 2014<br>Open channels, flumes or launders are used in the mining industry to transport slurries during processing and to disposal sites. Water plays a major part in the makeup of these slurries, its usage and availability is critical in countries where there are strict water usage management programs. The optimisation of flume design involves the maximisation of solids transport efficiency whilst, at the same

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17

Hunt, Alan Ernest. "The behaviour of turbulence in unsteady open channel flow." Thesis, University of Canterbury. Civil Engineering, 1997. http://hdl.handle.net/10092/7722.

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An investigation into the behaviour of the turbulence during laboratory simulations of floods in rivers with mild bed slopes was undertaken. Computer control of the flow rate into the flume enabled reproducible flood waves to be generated. To rigorously model the energy gradients in a long channel, an interactive sluice gate control was developed for the downstream end of the flume. Mean flow unsteadiness effects on the turbulence were evaluated by considering different duration hydrographs with similar shapes and magnitudes. The investigation was limited to the longitudinal component of turbu

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18

Belcher, Brian James. "VORTEX MODEL OF OPEN CHANNEL FLOWS WITH GRAVEL BEDS." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/702.

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Turbulent structures are known to be important physical processes in gravel-bed rivers. A number of limitations exist that prohibit the advancement and prediction of turbulence structures for optimization of civil infrastructure, biological habitats and sediment transport in gravel-bed rivers. This includes measurement limitations that prohibit characterization of size and strength of turbulent structures in the riverine environment for different case studies as well as traditional numerical modeling limitations that prohibit modeling and prediction of turbulent structure for heterogeneous bed

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19

Sharifi, Soroosh. "Application of evolutionary computation to open channel flow modelling." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/478/.

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This thesis examines the application of two evolutionary computation 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 a quasi 2D depth averaged Reynolds Averaged Navier Stokes (RANS) model to the flow in prismatic open channels. The RANS modeled adopted is the Shiono Knight Method (SKM) which requires three input parameters in order to provide closure, i.e. t

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20

Witz, Matthew J. "Mechanics of particle entrainment in turbulent open-channel flows." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=225690.

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An advanced understanding of particle entrainment is required to optimise the design and maintenance of numerous open channel hydraulic systems and structures placed in these systems; including river channels and canals. This study is on particle entrainment (defined as the movement of a particle from a stationary position to being mobile in the flow). Three aspects of particle entrainment were identified as the focus of this work: First, the waiting time for an exposed particle to entrain under constant flow conditions. Second, the flow features responsible for the entrainment of an individua

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21

Dvorak, Joseph Scot. "An optical water velocity sensor for open channel flows." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13979.

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Doctor of Philosophy<br>Department of Biological and Agricultural Engineering<br>Naiqian Zhang<br>An optical sensor for determining water velocity in natural open channels like creeks and rivers has been designed and tested. The sensor consists of a plastic body which is shaped so that water flows through a U-shaped channel into which are mounted LEDs and matching phototransistors at various angles. A small amount of dye is injected into the water just upstream of two sets of LEDs and phototransistors which are spaced 4 cm apart. The time delay between the dye’s effects on these signals depend

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22

Valyrakis, Manousos. "Initiation of Particle Movement in Turbulent Open Channel Flow." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27289.

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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 flow event. Two criteria for inception of grain entrainment, namely the critical impulse and critical energy concepts, are proposed and compared. These frameworks adopt a force or energy perspective, considering the momentum or energy transfer from each flow event to the particle respectively, to de

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23

Campbell, Lorna J. "Double-averaged open-channel flow over regular rough beds." Thesis, University of Aberdeen, 2005. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU214372.

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The majority of analysis of hydraulically rough open-channel flows has been founded on the temporally-averaged momentum equations (RANS). However, the structure of shallow open-channel flows over hydraulically rough beds, together with the near-bed region of deeper open-channel flows with rough beds awaits clarification. The purpose of this project was to conduct an extensive programme of laboratory-based experiments to gauge the applicability of the double-averaged momentum equations for shallow open-channel flows over simple rough beds (transverse square bars with varying centre-to-centre pi

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24

Shumate, Eric Dean. "Experimental Description of Flow at an Open-Channel Junction." Thesis, University of Iowa, 1998. https://ir.uiowa.edu/etd/5368.

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25

WAI, THWE AUNG. "DEVELOPMENT OF FUNDAMENTAL THEORY ON UNSTEADY OPEN CHANNEL FLOWS." Kyoto University, 2019. http://hdl.handle.net/2433/244536.

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26

Savio, Mario. "Turbulent structure and transport processes in open-channel flows with patchy-vegetated beds." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237016.

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Flow-vegetation interactions are critically important for most hydraulic and sediment processes in streams and rivers and thus need to be accounted for in their management. The central goal of this project therefore was to improve the understanding of flow-vegetation interactions in patchy-vegetated river beds, which are typical in rivers. Based on laboratory experiments covering a range of selected hydraulic and patch mosaic scenarios, the hydraulic resistance mechanisms, turbulence structure, and transport mechanisms were studied. The effects of regular patch mosaic patterns (aligned and sta

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27

Kim, Su Jin. "3D numerical simulation of turbulent open-channel flow through vegetation." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42892.

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A comprehensive understanding of the hydrodynamics in vegetated open-channels and flow-vegetation interaction is of high interest to researchers and practitioners alike for instance in the content of river and coastal restoration schemes. The focus of this study was to investigate the effect of the presence of vegetation on flow resistance, turbulence statistics, and the instantaneous flow in open channels by performing three-dimensional computational-fluid-dynamics (CFD) simulations. Firstly, fully developed turbulent flow in fully-vegetated channel was analyzed by employing the method of h

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28

Osawe, Maxwell Osayande. "Open channel turbulence modelling using layer-averaged large eddy simulation." Thesis, Queen Mary, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392113.

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29

Beaman, Faye. "Large eddy simulation of open channel flows for conveyance estimation." Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11130/.

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Prediction of conveyance capacity in open channel flows is complex and requires adequate modelling of flow features such as secondary circulation cells and, specifically for over-bank channels, the momentum exchange that occurs at the main channel/floodplain interface. A variety of conveyance estimation methods have been developed with the objective of accurately capturing these flow characteristics through a simplified user-friendly approach. However, these methods usually require calibration of one or more empirical constants. Within this thesis in-bank and over-bank channels have been numer

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30

Lagoa, Sérgio Miguel Chilra. "Open economy New Keynesian macroeconomic models and the cost channel." Thesis, University of Leicester, 2010. http://hdl.handle.net/2381/8596.

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Evidence in the literature points to a puzzling initial increase in inflation after an increase in nominal interest rates. This can be explained by the fact that firms have to borrow money to pay wages in advance, i.e., by the cost channel. In this paper, the study of the cost channel is extended to an open economy with sticky prices. It is shown that a broadened concept of the cost channel has significant implications for the economy's dynamics and monetary policy, and also contributes to explain some interesting empirical evidence. Supply side effects of interest rates and import prices on i

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31

Lu, Zhihua. "Stochastic modelling of unsteady open channel flow and reliability analysis /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202008%20LU.

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32

Oelerich, Jerry J. "Open-channel capillary flow in micro-scale helical support structures." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Spring2009/J_Oelerich_042709.pdf.

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Thesis (M.S. in chemical engineering)--Washington State University, May 2009.<br>Title from PDF title page (viewed on June 8, 2009). "Department of Chemical Engineering." Includes bibliographical references (p. 70-71).

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33

Kawamoto, Hideko. "Summer rain part 1, Summer rain - dawn, for two channel tape ; part 2, After the summer rain, for piano and two channel tape /." connect to online resource. Access restricted to the University of North Texas campus, 2001. http://www.library.unt.edu/theses/open/20013/kawamoto%5Fhideko/index.htm.

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34

Welch, Chapman. "Tele using vernacular performance practices in an eight channel environment /." Thesis, connect to online resource, 2003. http://www.library.unt.edu/theses/open/20032/welch%5Fchapman/index.htm.

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35

Papadopoulou, Symela. "Velocity distribution in shallow open channel flow over square bar roughness." Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=58994.

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36

Hurther, David. "3-D acoustic Doppler velocimetry and turbulence in open-channel flow /." Lausanne, 2001. http://library.epfl.ch/theses/?nr=2395.

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37

Kironoto, Bambang Agus. "Turbulence characteristics of uniform and non-uniform, rough open-channel flow /." [S.l.] : [s.n.], 1993. http://library.epfl.ch/theses/?nr=1094.

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38

Yulistiyanto, Bambang. "Flow around a cylinder installed in a fixed-bed open channel /." [S.l.] : [s.n.], 1997. http://library.epfl.ch/theses/?nr=1631.

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39

Afzalimehr, Hossein. "Contribution to non-uniform open channel flows over gravel and cobble." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0013/NQ36222.pdf.

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40

Tachie, Mark Francis. "Open channel turbulent boundary layers and wall jets on rough surfaces." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ63927.pdf.

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41

Wang, Kun-Pao, and 王昆保. "Open-Channel Chute Flow Analysis." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/22950202375055464346.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>85<br>This study presents experimental analysis for open-channel chute flow at channel bed with 30, 35, 38, and 41 degrees. The channel bed was coated by plastic blankets with rough surface to simulate the Manning''s roughness coefficients. The Manning''s roughness coefficients were equal 0.020, 0.022, and 0.025. The location of white water inception point was found to be proportional to bed slope and inversely proportional to Reynolds number and Manning''s roughness coefficient. The Manning''s roughness coefficients were further modified by the experimental dat

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42

Yang, Ching-Hsu, and 楊景旭. "90 degree Dividing Open-Channel Flow." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/85394637105908981463.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>85<br>Dividing flow are of considerable importance in study of open-channel. An experimental investigation of the flow structure at a right angles dividing open-channel flow is presented. The most comprehensive studies were concerned with backwater characteristic and energy losses. Most of the investigators have studied the problem depending on the control condition in the main channel and the branch channel. At present, the study of dividing flow problem restricted the width ration of the branch channel to the main channel 1.0 and 0.5. At the downstream of

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43

FAN, YUNN-CHERNG, and 樊運成. "90 degree Dividing Open-channel Flow." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/01088593417882090150.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>86<br>Dividing flow are of considerable importance in study of open- channel. An experimental investigation of the flow structure at a right angles dividing open-channel flow is presented. The most comprehensive studies were concerned with backwater characteristic and energy losses. Most of the investigators have studied the problem depending on the control condition in the main channel and thebranch channel. At present , the study of dividing flow problem restri

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44

WU, YING-BIN, and 吳慶彬. "Wave deformation in open channel of abrupt transitions of channel width." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/13400964832284106807.

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45

Haque, AKM Enamul. "Some characteristics of open channel transition flow." Thesis, 2009. http://spectrum.library.concordia.ca/976403/1/MR63268.pdf.

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Flow separation is a common phenomenon in decelerated subcritical flows as in open channel expansions. A highly distorted velocity and shear stress distribution due to flow separation can lead to a continuous reduction of energy and trigger an adverse pressure gradient resulting in flow separation. This causes loss of energy and hydraulic efficiency of the systems. An experimental investigation was conducted with the use of a gradual rising hump on the bed of an expansion in a rectangular open channel. Besides the hump, split vanes in the flow field were also used to reduce the expansion angle

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46

Li, Cheng-Pu, and 李政璞. "A Study of Open-Channel Chute Flow." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/43530004196557697508.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>89<br>This study talks about the chute flow of open-channel at channel bed with 41 degrees .The channel bed was covered with plastic blankets to simulate the Manning’s roughness coefficients .The study lets the Manning’s roughness coefficients equal to 0.020. In the study , use hot-film anemometer and conical hot-film probe and water probe calibration to get a calibration value about voltage and velocity of water .After computing , produce a critical voltage value and get an air concentration value . Use the both values to abtain the air concentration distribution n

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47

Li, Wei-Yi, and 李威毅. "Design of Non-contactive Open-channel Flowmeter." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/00994582701707992505.

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碩士<br>國立中央大學<br>電機工程研究所<br>87<br>In industry, flow velocities and volumes are both very important parameters, but it is not easy to be measured accurately. Traditional flowmeters have some limitations, such as high temperature, erosive, poison, inflammable environment. Hence, they are only used in certain types of fluid and may cause great inaccuracy or inconvenience. Moreover, highly accurate flowmeters are expensive in both price and maintenance. Consequently the motive of this dissertation is coming out. The aim of this project is to measure flow velocity in open channel. The

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48

Kuo, Po-Wen, and 郭博文. "A Study for Unsteady Open Channel Flow." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/43664883488092232446.

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碩士<br>淡江大學<br>水資源及環境工程學系<br>90<br>The objective of this study is to develop a linearized analytical solution for unsteady open channel flow. The method is applied to rectangular trapezoidal cross sections and natural stream flow. In the process, I neglected the inertia terms in the Saint-Venant moment equation. And obtained the linearized Saint-Venant equation by small perturbation method. Compare the analytical solutions with the numerical solutions, the linearized analytical solution can obtain a good approximation efficiently if we choose an appropriate reference disch

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Subrahmanya, Praveena Alangar, and 蘇邁亞. "Pool boiling on open trapezoidal channel surface." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/82191724169102979509.

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碩士<br>國立中央大學<br>能源工程研究所<br>103<br>In this thesis pool boiling experiment is carried out on open trapezoidal channel surface to study the effect of channel top width (0.4mm, 0.8mm, 1.4mm and 2.0mm) and fin pitch using saturated methanol as working fluid at one atmospheric pressure along with bubble dynamic visualisation. The channel were cut using wire electro-discharge machining technique and results are compared with corresponding plane surfaces. Plain boiling surface with comparatively high roughness value (manufactured by wire electro-discharge machining) consistently showed higher heat tra

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50

Yu, Wen-Pu, and 游文圃. "Energy Loss for series Cylinders along channel bank in Open-Channel Flow." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22786350800670770832.

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碩士<br>淡江大學<br>水資源及環境工程學系碩士班<br>100<br>This study uses the model and simulation to analyze the Energy Loss for series cylinders along channel bank in Open-Channel Flow. The test model to placed on straight channel. The experiment was conducted in flume 10.50m long, 0.39m wide and 0.19m high with bed slope=0.003. Placed in the channel one to nine cylindrical,cylinder width of 3.4cm and 4.0cm,cylindrical center distance is 4.0cm The test set Different boundary conditions up to Energy loss of series cylinder under various Froude numbers. This study uses the FLUENT to establish the unsteady fl

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