Rozprawy doktorskie na temat „Open channel flow”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Open channel flow”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Hopton, Stephen. "Modelling open channel flow". Thesis, University of Nottingham, 2010. http://eprints.nottingham.ac.uk/11594/.
Pełny tekst źródłaDelis, 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.
Pełny tekst źródłaMoores, Andrew. "Solute mixing in open channel flow". Thesis, Heriot-Watt University, 1996. http://hdl.handle.net/10399/686.
Pełny tekst źródłaShrestha, 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.
Pełny tekst źródłaDickman, Brian Daniel. "Large scale roughness in open channel flow". Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/22953.
Pełny tekst źródłaLegono, D. "Behaviour of flow in open channel bends". Thesis, City University London, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375820.
Pełny tekst źródłaBayat, David, i 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.
Pełny tekst źródłaArshad, 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.
Pełny tekst źródłaRoberts, 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.
Pełny tekst źródłaMacDonald, 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.
Pełny tekst źródłaStewart, 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.
Pełny tekst źródłaBurger, 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.
Pełny tekst źródłaOpen 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 time reduces water usage. The design of open channels is complex as it is dependent on both the slurry rheology and the channel shape. Very little has been reported in the literature for predicting non-Newtonian laminar flow in open channels of arbitrary cross-section. The only method available was that proposed by Kozicki and Tiu (1967, 1986). The shape factors they used were those evaluated from analytical solutions for flow of Newtonian fluids in open channels of the same cross-section. However, they carried out no experimental work to validate their model. Few experimental studies have been made on the effect of shape on non-Newtonian flow in open channels. Naik (1983) tested kaolin in water suspensions in a rectangular channel. Coussot (1994) provided some data for the flow of a Herschel-Bulkley fluid in rectangular and trapezoidal channels. Fitton (2007; 2008) obtained data for flow of three different non-Newtonian fluids (carboxymethylcellulose, carbopol and thickened tailings) in a semi-circular channel. A large experimental database for non-Newtonian flow in rectangular open channels was published by Haldenwang (2003) at the Flow Process Research Centre, Cape Peninsula University of Technology. Guang et al. (2011) performed Direct Numerical Simulations of turbulent flow of a yield- pseudoplastic fluid in a semi-circular channel. They compared their simulations with actual field measurements and found them to over-predict the flow velocity by approximately 40%. The source for this discrepancy was difficult to ascertain. A comprehensive database was compiled during this research of the flow of three non–Newtonian fluids in rectangular, trapezoidal, semi-circular and triangular channels. The flow of carboxymethylcellulose solutions and aqueous kaolin and bentonite suspensions was investigated in a 10 meter long flume at angles ranging from 1° to 5° from the horizontal plane. The effect of channel shape on the friction factor-Reynolds number relationship for laminar and turbulent open channel flow of these three fluids was investigated. New models for the prediction of laminar and turbulent flow of non-Newtonian fluids in open channels of different cross-sectional shapes are proposed. The new laminar and turbulent velocity models are compared with three previously-published velocity models for laminar flow and five previously-published velocity models for turbulent flow using average velocity as comparison criteria. For each channel shape, the laminar flow data can be described by a general relationship, f = K/Re where f is the Fanning friction factor and Re is the appropriate Haldenwang et al. (2002) Reynolds number. The K values were found to be 14.6 for triangular channels with a vertex angle of 90°, 16.2 for semi-circular channels, 16.4 for rectangular channels and 17.6 for trapezoidal channels with 60 degree sides. These K values were found to be in line with those reported by Straub et al. (1958) and Chow (1969) for open channel laminar flow of Newtonian fluids as opposed to the assumption made by Haldenwang et al. (2002; 2004) of using a constant value of 16 based on the pipe flow paradigm for all channel shapes. This new laminar model gave a closer fit to the laminar flow data than those from the three previously-published models. However, the presence of the yield stress still presents a problem, which makes the flow prediction in laminar flow for such fluids not very accurate. The investigation on non-Newtonian turbulent flow of the three fluids in the four different shaped open channels revealed that the data was described by the modified Blasius equation f = a Re b where a and b are constant values determined for each channel shape and Re is the Haldenwang et al. (2002) Reynolds number. Values of a and b for a rectangular channel were found to be 0.12 and -0.330, for a semi- circular channel 0.048 and -0.205, for a trapezoidal channel with 60° sides, 0.085 and -0.266 and for a triangular channel with vertex angle of 90°, 0.042 and -0.202. New laminar and turbulent velocity models were derived from using the new laminar f = K/Re and turbulent f = a Re b, friction factor-Reynolds number relationship. The laminar velocity model did not always give the best result, but the majority of the time it did, compared to the three previously published models. The new turbulent velocity model yielded the best results when compared to the five previously published models using average velocity as comparison criteria. The composite power law modelling procedure of Garcia et al. (2003) used for pipe flow predictions was extended to the present work on non-Newtonian flow in open channels of various cross-sections. The results show that the modelling technique used by Garcia et al. (2003) for pipe flow can be used to adequately predict flow in an open channel of a given cross-sectional shape provided that an appropriate Reynolds number is used to take into account the non-Newtonian behaviour of the test fluid. It was found that the results using the Haldenwang et al. (2002) Reynolds number yielded better results than those based on the adapted Metzner-Reed Reynolds number. The correlations and models developed and experimentally validated during this research can be used to further improve the design of rectangular, semi-circular, trapezoidal and triangular open channels to transport non-Newtonian fluids.
Keogh, Darren Paul. "An experimental investigation on the flow characteristics of open-channel slot flow". Thesis, Edinburgh Napier University, 2000. http://researchrepository.napier.ac.uk/Output/4273.
Pełny tekst źródłaHunt, Alan Ernest. "The behaviour of turbulence in unsteady open channel flow". Thesis, University of Canterbury. Civil Engineering, 1997. http://hdl.handle.net/10092/7722.
Pełny tekst źródłaSharifi, Soroosh. "Application of evolutionary computation to open channel flow modelling". Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/478/.
Pełny tekst źródłaValyrakis, Manousos. "Initiation of Particle Movement in Turbulent Open Channel Flow". Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27289.
Pełny tekst źródłaPh. D.
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.
Pełny tekst źródłaShumate, Eric Dean. "Experimental Description of Flow at an Open-Channel Junction". Thesis, University of Iowa, 1998. https://ir.uiowa.edu/etd/5368.
Pełny tekst źródłaBoxall, Joseph B. "Dispersion of solutes in sinuous open channel flows". Thesis, University of Sheffield, 2000. http://etheses.whiterose.ac.uk/14803/.
Pełny tekst źródłaSavio, 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.
Pełny tekst źródłaMa, Jianmin. "Numerical analysis of flow structures and bed entrainment in turbulent open-channel flow". Thesis, Queen Mary, University of London, 2009. http://qmro.qmul.ac.uk/xmlui/handle/123456789/524.
Pełny tekst źródłaVanyaza, Sydwell Luvo. "Non-newtonian open-channel flow : effect of shape on laminar and transitional flow". Thesis, Cape Technikon, 2004. http://hdl.handle.net/20.500.11838/874.
Pełny tekst źródłaWhen designing the open channels to transport the homogenous non-Newtonian slurries, the effect of channel shape is one of the parameters that should be checked and very little research has been conducted to address this matter. Open channels are commonly applied in the mining industry where mine tailings have to be transported to the disposal dams at high concentrations to save water consumption. This thesis addresses the effect of the cross-sectional shape of the channel with emphasis on laminar and transitional flow of non-Newtonian fluids. The literature review on the flow of Newtonian and non-Newtonian fluids has been presented. The most relevant one to this topic is the work done by Straub et al (1958) for Newtonian fluids and the analytical work presented by Kozicki and Tiu (1967) for non-Newtonian fluids. Authors like Coussot (1994) and Haldenwang (2003) referred to their work but did not comprehensively verified it experimentally. Three flume shapes were designed to investigate this problem namely, rectangular, semi circular, and trapezoidal flume shape. The test rig consisted of a 10 m long by 300mm wide tilting flume that can be partitioned into two sections to form a 150 mm wide channel. All three flume shapes were tested in both the 150 mm and 300 mm wide flumes. This flume is linked to the in-line tube viscometer with three tube diameters namely, 13 mm; 28 mm; and 80 mm. The experimental investigation covered a wide range of flow rates (0.1-45l/s), and flume slopes (1-5 degrees). The fluids tested were kaolin suspension (5.4 - 9% v/v), CMC solution (1 - 4% m/m), and bentonite suspension (4.6 and 6.2% mlm). The models found in the literature were evaluated with the large database compiled from the test results to predict the laminar and transitional flow of these fluids with the aim of checking the effect of the cross-sectional shape of these channels selected in these flow regimes. For all the flume shapes and non-Newtonian fluids selected in this thesis it was found that in predicting the laminar flow, the effect of shape is adequately accounted for by the use of hydraulic radius. In predicting the transitional flow, it was found that the effect of shape does not have to be included.
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.
Pełny tekst źródłaKim, Su Jin. "3D numerical simulation of turbulent open-channel flow through vegetation". Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42892.
Pełny tekst źródłaLu, 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.
Pełny tekst źródłaOelerich, 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.
Pełny tekst źródłaTitle from PDF title page (viewed on June 8, 2009). "Department of Chemical Engineering." Includes bibliographical references (p. 70-71).
Siqueira, Renato do Nascimento. "Transport and mixing processes in stratified flow". Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/34335.
Pełny tekst źródłaKhatibi, Rahman Haghi. "Mathematical open channel flow models and identification of their friction parameters". Thesis, University of London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263145.
Pełny tekst źródłaPapadopoulou, 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.
Pełny tekst źródłaHurther, David. "3-D acoustic Doppler velocimetry and turbulence in open-channel flow /". Lausanne, 2001. http://library.epfl.ch/theses/?nr=2395.
Pełny tekst źródłaKironoto, 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.
Pełny tekst źródłaYulistiyanto, Bambang. "Flow around a cylinder installed in a fixed-bed open channel /". [S.l.] : [s.n.], 1997. http://library.epfl.ch/theses/?nr=1631.
Pełny tekst źródłaStewart, Robert L. III. "DECELERATING OPEN CHANNEL FLOW OVER GRAVEL: TURBULENCE STRUCTURE & SENSOR DEVELOPMENT". UKnowledge, 2014. http://uknowledge.uky.edu/ce_etds/25.
Pełny tekst źródłaBrevis, Vergara Wernher Ariel. "Experimental Investigation of the Flow Hydrodynamics in Open-Channel Dead Zones". Tesis, Universidad de Chile, 2009. http://repositorio.uchile.cl/handle/2250/102106.
Pełny tekst źródłaPeruzzo, Paolo. "Diffusion of floating particles in open channel flow through emergent vegetation". Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422187.
Pełny tekst źródłaIn questa tesi è stato studiato il problema della dispersione di particelle galleggianti in presenza di vegetazione emergente per mezzo di analisi sperimentali, numeriche e teoriche dei meccanismi che ne governano la ritenzione temporanea e la cattura da parte delle piante. Nel Capitolo 1 sono presentati i risultati delle prove di laboratorio effettuate per indagare il trasporto e la diffusione di particelle galleggiati (ad esempio alcune varietà di semi) in un canale con vegetazione emergente. Questi esperimenti sono stati svolti per fornire una comprensione più ampia dei principali processi di interazione particella-pianta responsabili del processo diffussivo osservato. Queste osservazioni qualitative sono state successivamente utilizzate per mettere a punto un modello stocastico per il trasporto e la diffusione di particelle galleggianti. Ulteriori dati raccolti sperimentalmente, quali la distribuzione delle distanze percorse dalle particelle prima di essere catturate permanentemente dalle piante e la distribuzione dei tempi di arrivo in alcune specifiche sezioni del tratto vegetato utilizzato nelle prove sperimentali, sono invece stati utilizzati per la calibrazione e la validazione del modello. Il confronto tra i risultati forniti dal modello e quelli sperimentali è soddisfacente e suggerisce che gli aspetti più rilevanti osservati nei processi di interazione particella-vegetazione sono opportunamente descritti dal modello. Nel Capitolo 2 sono presentati i risultati di nuove prove sperimentali effettuate per approfondire la conoscenza dei processi di trasporto e di diffusione. In questo caso le prove sono state realizzate per valutare l’influenza della densità della vegetazione e della velocità della corrente sui meccanismi di interazione precedentemente individuati. I risultati, infine, sono stati utilizzati per confermare la validità del modello proposto nel Capitolo 1. E' stato trovato che i) la definizione più corretta di interasse tra le piante è 1/npdp, dp, essendo dp il diametro della pianta e np il numero di piante per unità d’area, ii) la distribuzione dei tempi di ritenzione delle particelle può essere approssimato da una combinazione di due distribuzioni esponenziali opportunamente pesate, iii) la velocità della corrente ha un forte impatto sui tempi di ritenzione e sull'efficacia dei differenti meccanismi di cattura, mentre iv) la distribuzione e la densità della vegetazione gioca un ruolo di minor rilievo, se non addirittura trascurabile, sulla probabilità di cattura e sui tempi di ritenzione. Nella prima parte del Capitolo 3 è studiata nel dettaglio la dinamica di cattura di un collettore cilindrico dovuta alla tensione superficiale (cioè l’effetto Cheerios). Lo studio mostra che, quando la forza capillare è comparabile alle forze inerziali, l’efficienza di cattura del collettore aumenta significativamente rispetto al caso in cui le particelle siano non galleggianti. Nella seconda parte del Capitolo 3, invece, sono proposte e verificate attraverso prove di laboratorio, alcune migliorie al modello introdotto nel Capitolo 1. In questo caso la vegetazione emergente è simulata da una schiera di cilindri, disposti casualmente, e distanziati tra loro in modo tale che le particelle non possano essere soggette alla cattura dovuta ad una coppia di cilindri e definita net trapping nel corso del Capitolo 1. Una buona corrispondenza è stata trovata anche quando i risultati forniti dal modello sono stati confrontati con alcuni dati sperimentali reperiti in letteratura relativi a semi reali ed a piante aventi una morfologia più complessa.
DALLALI, MARYAM. "Large Eddy Simulation of Suspended Sediment In Turbulent Open-Channel Flow". Doctoral thesis, Università degli Studi di Trieste, 2016. http://hdl.handle.net/11368/2908065.
Pełny tekst źródłaWang, Kun-Pao, i 王昆保. "Open-Channel Chute Flow Analysis". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/22950202375055464346.
Pełny tekst źródła淡江大學
水資源及環境工程學系
85
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 data. Relationships between the effective depth or the depth with air concentration being 95% and the depth calculated by the standard step without air concentration were found which enable the depth-averaged air concentration to be calculated.
Chen, Jui-Yen, i 陳睿彥. "Flow-Depth Velocity Distribution Equationsfor Open Channel Flows". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/49242144806671080582.
Pełny tekst źródła國立成功大學
水利及海洋工程學系碩博士班
91
The log-low flow-depth velocity distribution equations for open channel flow and the Coles’ wake-flow function were reviewed wake-strength coefficient in the wake function at various flow conditions were compared. The result reveals that the values of are presented by previous investigators between -0.27 and 0.65. It is also found that Cloes’s revised wake-flow function can not well describe the velocity distributions for some open channel flows which are influenced by the pressure gradient and the side-wall-effects. We propose a method to overcome the problem. The velocity distribution is divided into upper region and lower region at the basis on the depth where the maximum velocity. When the two coefficients are the same which to be equal to the Cloes revised wake-flow function. Comparison of the proposed double-layer velocity distribution with measured data by Cloemen(1981) and Kirkgoz and Ardiclikglu(1997). The results show that the present proposed method can well describe the velocity distributions, with between 0.9 and 1.6 and between -0.02 and 0.69. Besides, the modified functions for the power-low equation are also investigated in the present study. A modified function F(y/ )= is proposed for the power-low velocity distribution, and compared with the measured data. It shows that the revised power-low equation can well describe the velocity distribution. Based on Coleman’s data , and the velocity correction is between 0.15 and 0.28, and proportional with the vertically averaged volumetric sediment concentration.
Yang, Ching-Hsu, i 楊景旭. "90 degree Dividing Open-Channel Flow". Thesis, 1997. http://ndltd.ncl.edu.tw/handle/85394637105908981463.
Pełny tekst źródła淡江大學
水資源及環境工程學系
85
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 the branch channel, using a pump of 5 hp to pump. Result of this study indicates that the section U4 and the section LO and the section L4 has about equal depth. In the branch channel, the width of circulation zone is larger at the surface than at the surface than at the bottom. The energy loss is large in the branch channel.
FAN, YUNN-CHERNG, i 樊運成. "90 degree Dividing Open-channel Flow". Thesis, 1998. http://ndltd.ncl.edu.tw/handle/01088593417882090150.
Pełny tekst źródła淡江大學
水資源及環境工程學系
86
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 restricted thewidth ration of the branch channel to the main channel 1.0 and 0.5. At thedownstream of the branch channel, using a pump of 5 hp to pump. Result of this study indicates that the section L0 and the section L4 has about equal depth. In the branch channel, the width of circulation zone is larger at the surface than at the bottom. The energy loss is large in the branch channel due to circulation.
BHARDWAJ, DHARMENDRA. "FLOW ANALYSIS IN COMPOUND OPEN CHANNEL FLOW USING ANSYS". Thesis, 2017. http://dspace.dtu.ac.in:8080/jspui/handle/repository/15838.
Pełny tekst źródłaHaque, AKM Enamul. "Some characteristics of open channel transition flow". Thesis, 2009. http://spectrum.library.concordia.ca/976403/1/MR63268.pdf.
Pełny tekst źródłaLi, Cheng-Pu, i 李政璞. "A Study of Open-Channel Chute Flow". Thesis, 2001. http://ndltd.ncl.edu.tw/handle/43530004196557697508.
Pełny tekst źródła淡江大學
水資源及環境工程學系
89
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 normal to the bed . And get a perturbation range value .The depth calculated and the depth with air concentration being 95% and the effective depth were found in the study.
Kuo, Po-Wen, i 郭博文. "A Study for Unsteady Open Channel Flow". Thesis, 2002. http://ndltd.ncl.edu.tw/handle/43664883488092232446.
Pełny tekst źródła淡江大學
水資源及環境工程學系
90
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 discharge.
Su, Kuo-Tseng, i 蘇國琮. "Non-Equal Width 30 Dividing Open Channel Flow". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/71408473259320875455.
Pełny tekst źródła淡江大學
水資源及環境工程學系碩士班
93
This study presents the experimental results for 30° divided sub- critical open-channel flow. The branch- to main-channel width ratios were 1, 1/2, and 1/3. For each run, 7 discharges were conducted in the ex- periments. The experimental results showed that the flow is fully de- veloped and uniformly distributed at 4 channel-widths upstream of dividing point. It also showed that the flow angle at the interface increases with increasing discharge ratio while the re-circulation width and the reattachment length decrease. The downstream- to upstream-depth ratio in the main channel depends on the discharge ratio and downstream Froude number. The depth ratio increases with increasing discharge ratio and decreases with increasing downstream Froude number. In addition, the energy loss coefficient increases with increasing width ratio.
Wu, Han-Ping, i 吳翰泙. "A Study on Subcritical Open-Channel Junction Flow". Thesis, 2001. http://ndltd.ncl.edu.tw/handle/22183803017085326686.
Pełny tekst źródła淡江大學
水資源及環境工程學系
89
This study is using the experimental data of previous studies to analysis the circumstances of subcritical open-channel junction flow. And describes a one-dimensional approach to solving both the upstream-to-downstream depth ratio and the energy loss coefficient through non-equal width junction flow over horizontial beds. The results are found to be in good agreement with the experimental data. The depth ratio and energy loss coefficient is increase with increase junction angle and with increase downstream Froude number. Besides, the cross-section mean flow angle at the branch channel entrance was determined through detailed measurement of velocity vectors and was found to decrease as the discharge ratio increases and the junction angle decreases.
Ho, Tai-Yi, i 何泰亦. "Non-Equal Width 45° Dividing Open Channel Flow". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/74189245268291549733.
Pełny tekst źródła淡江大學
水資源及環境工程學系
91
The study on non-equal width open-channel flow is using three channel width ratio(branch to main 1 ,1/2 ,1/3)and seven discharge ratio under 45 degree angles dividing flow by hydraulic experiments. The channel bed of present study is horizontal and the cross section is rectangular.Besides, the main channel flow is subcritical. At the downstream of main and branch channel use gates to control the discharge ratio and depth.The measurement including the depth and velocity of upstream and downstream in main and branch channel. The reasons influence status of dividing flow are channel width ratio, slop of channel bed and angle between main and branch channel. According to the results of the experiment show that the flow angle will become smaller while the discharge ratio become larger and the width of channel become larger. The width of circulation zone near water surface is larger than at the bottom. The energy loss is large in the branch channel.
Chen, Yan-Yuan, i 陳衍源. "Linear analysis of gradually flow in open channel". Thesis, 1994. http://ndltd.ncl.edu.tw/handle/61360903754898636037.
Pełny tekst źródłaWu, Feng Shuai, i 吳豐帥. "A Study on Subcritical Open-Channel Junction Flow". Thesis, 1994. http://ndltd.ncl.edu.tw/handle/92804089359142611998.
Pełny tekst źródła淡江大學
水資源及環境工程所
82
In river and drainage engineering the study of upstream water rises and downstream circulation with energy losses at junction region is still in its infancy. Most of the one dimensional numerical simulation at the junction region the energy equation are assumed either constant water level at the upstream, lateral and downstream sections or no energy losses at the junction. This study performed the variable angle junction flow experiments and developed an one dimensional analytical model to predict the constraction coefficient and the up- stream depth-rise by using mass, momentum, and energy conservation principles. The results show that constraction coefficients and depths are functions of discharge ratio, energy coefficient, momentum coefficient and the dowmstram froude number. A numerical model of two dimensional depth-averaged junction flow has been also developed. The simulated results for 90, 70 and 60 junction-angles flows at discharge ratio of 0.1, 0.5 and 0.9 are in good agreed to the experimental data and the results appear reasonably acceptable.
Yang, Sen-Hao, i 楊森豪. "Numerical Study for 1D Open Channel Flow Equations". Thesis, 1995. http://ndltd.ncl.edu.tw/handle/62968517411533574833.
Pełny tekst źródła輔仁大學
數學系
83
The purpose of study is to investigate about One-dimensional open channel flow equation of conservation laws. Furthermore, discuss both of the relations of St. Venant equations to Euler equations and St. Venant equations to shallow water equations, respectively. Moreover, because St. Venant Equations is resemble in many respects the equations of compressible flow, thus we can solve the Riemann problem by Roe and Roe-Sweby scheme, which used in gas dynamic's analysis. In numerical computation, we adopt Roe and Roe-Sweby scheme with Roe- averaged and new Roe's matrices, respectively, to solve the dam breaking and bore propagation problems. Final, compare and observe how is the numerical solutions, which obtained from these experiments.