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Tesi sul tema "Stratified flow"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Kurban, Adib Paulo Abdalla. "Stratified liquid-liquid flow." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/7553.

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2

Bourban, Sebastien E. "Stratified shallow flow modelling." Thesis, Open University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.664520.

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Abstract (sommario):

Environmental hydraulics covers a very wide range of applications including free surface flows in rivers. estuaries and lakes. To find engineering solutions to environmental hydraulics problems. 3D numerical modelling is nowadays widely used. However. the computation of sharp spatial gradients (such as found in stratified estuaries and lakes. around plumes near outfalls along rivers and coasts or in exchange areas of high shear). and the modelling of these processes along steep bathymetric slopes (such as found at the edge of dredged channels or of the continental shelf) remains a challenge. I

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3

Rea, Suzanne. "Stratified flow at T-junctions." Thesis, University of Nottingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287195.

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4

Ng, Tzuu Shing. "Interfacial structure of stratified pipe flow." Thesis, Imperial College London, 2002. http://hdl.handle.net/10044/1/11274.

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5

Shaha, Jonathan. "Phase interactions in transient stratified flow." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/8653.

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6

Iial-Awad, Ahmad Salmeh. "Stratified flow in the built environment." Thesis, University of Hertfordshire, 2006. http://hdl.handle.net/2299/14350.

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Stratified flow in an environmental chamber has been investigated. The chamber of dimensions (7.5m long, 5.6m wide and 3.0m) at the University of Hertfordshire has been used. Sets of experiments investigating the effect of the major flow parameters such as airflow rate, jet momentum, flow conditions and height of the air supply device have been conducted. Results have been obtained to evaluate the flow characteristics and thermal stratification mechanism. The study has demonstrated the validity of using smoke visualization to evaluate the stratified flow characteristics such as interface level

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7

Feng, Yanhua. "Stably stratified shear flow over complex terrain." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264359.

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8

Omar, Hanan. "Intrusion flow into a density stratified resevoir." Thesis, Omar, Hanan (2016) Intrusion flow into a density stratified resevoir. PhD thesis, Murdoch University, 2016. https://researchrepository.murdoch.edu.au/id/eprint/30247/.

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Steady two-dimensional flows from an angled structure into a lake or a reservoir where the interface between the intrusion and the ambient fluid separates from a solid wall is considered. The fluid is assumed to be of finite depth and the incoming channel makes an angle _ with the horizontal axis. The problem is formulated using conformal mapping and integral equation techniques and the resulting problem is solved using a surface angle approach. The shape of the interface is computed for a range of entry angle and flow rate. Exact solutions are presented at a high flow rate and compared with t

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9

Siqueira, Renato do Nascimento. "Transport and mixing processes in stratified flow." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/34335.

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The processes of transport and mixing in stratified open channel flows are investigated in this thesis. Detailed measurements of velocity and salinity were conducted, through the use of Laser-Induced Fluorescence (LIP) technique together with Laser Doppler anemometry, so that the effects of secondary current and stratification on the flow behaviour could be analysed. Two configurations were investigated: a rectangular open channel, and a compound open channel. For each configuration, four different stratification levels were analysed. The main flow characteristics, such as corner flow and velo

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10

Chilakamarri, Kiran Babu. "Rotating and stratified fluids /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487584612163036.

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11

Sit, Ming-fai. "Computation of stratified flow past three dimensional surface mounted obstacles /." [Hong Kong] : University of Hong Kong, 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12431060.

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12

Gargallo, Gallego Mireia. "Countercurrent flow limitations in horizontal stratified flows of air and water." Karlsruhe : FZKA, 2004. http://bibliothek.fzk.de/zb/berichte/FZKA7018.pdf.

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13

Skopovi, Ivan 1976. "The role of background flow variations in stratified flows over topography." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35632.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaves 89-91).<br>As the atmosphere and oceans feature density variations with depth, the flow of a density-stratified fluid over topography is central to various geophysical and meteorological applications and has been studied extensively. For reasons of convenience and mathematical tractability, the majority of theoretical treatments of stratified flow over a finite-amplitude obstacle assume idealized background flow conditions, namely constant free-stream ve

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14

Abrishami-Savjublagh, Yoseph. "Numerical computations of dispersed flow and gravity stratified two-phase flow." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47736.

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15

Olvera, Cabrera Daniel. "Coherent structures in stably stratified plane couette flow." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723480.

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16

Johnstone, Roderick. "Numerical simulation of stably stratified flow over hills." Thesis, University of Surrey, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364820.

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17

Oglethorpe, Rosalind Leigh Frances. "Mixing in stably stratified turbulent Taylor-Couette flow." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708399.

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18

Kay, David J. "Mixing processes in a highly stratified tidal flow /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/9639.

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19

Klymak, Jody Michael. "Stratified flow and turbulence over an abrupt sill /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/10982.

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20

Renaud, Antoine. "On wave-mean flow interactions in stratified fluid." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEN059/document.

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Abstract (sommario):

La dynamique des écoulements géophysiques planétaires est fortement influencée par des processus physiques souvent non résolus par les modèles numériques de circulation générale. Il est essentiel de comprendre les mécanismes physiques sous-jacents pour paramétrer l’effet des petites échelles sur les grandes. Dans cette thèse, nous étudions un problème emblématique d’interactions entre ondes et écoulements moyens : la dynamique des écoulements zonaux forces par des ondes internes de gravite. Une manifestation remarquable de ces interactions est l’oscillation quasi-biennale (QBO) des vents équat

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21

Hughes, Graham Owen. "Aspects of mixing in stratified flows." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324969.

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22

Holmes, Damian J. "Gravity waves in uniform windflow over topography." Thesis, University of Surrey, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336449.

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23

Khor, Siew Hiang. "Three-phase liquid-liquid-gas stratified flow in pipelines." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8714.

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24

薛明輝 and Ming-fai Sit. "Computation of stratified flow past three dimensional surface mounted obstacles." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31208897.

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25

梁偉文 and Wai-Man Leung. "Computational studies on the motion of a stratified fluid." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31226346.

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26

Leung, Wai-Man. "Computational studies on the motion of a stratified fluid /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B23589504.

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27

Issaev, Vassili. "Turbulent mixing in temporally evolving stratified channel flow, an investigation through direct numerical simulations." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29903.

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Abstract (sommario):

Turbulent flows affected by stable density stratification occur ubiquitously in wide range of geophysical and environmental flows such as the ocean, the atmosphere or rivers and lakes. Within such flows the process of turbulent mixing plays a leading order role in numerous physical and ecological processes such as the vertical transport of heat, salt and nutrients as well as being vital to accurately predict global energy circulation models. A better understanding of the flow dynamics and the mechanisms that govern turbulent mixing as well as its accurate prediction in stratified flows is

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28

Khallahle, Jack Buckhill. "Numerical Simulation of Flow Parameters in Stratified Gas-Liquid Flow in a Horizontal Pipe." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29931.

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Abstract (sommario):

The transportation of gas-liquid mixtures in horizontal pipes as two-phase stratified flow is examined using computational fluid dynamics (CFD) method. The design of these pipelines requires accurate prediction of flow parameters such as pressure drop and liquid holdup. Many empirical correlations have been developed in the last 70 years and are well documented in the literature to obtain these parameters using experimental, analytical and numerical methods. In this investigation, the numerical method based on CFD code-FLUENT is used as an alternative to the experimental method to obtained

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29

Davies, Wykes Megan Sydney. "Efficient mixing in stratified flows : Rayleigh-Taylor instability within an otherwise stable stratification." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708349.

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30

Omgba-Essama, C. "Numerical modelling of transient gas-liquid flows (application to stratified & slug flow regimes)." Thesis, Cranfield University, 2004. http://hdl.handle.net/1826/1057.

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A new methodology was developed for the numerical simulation of transient two-phase flow in pipes. The method combines high-resolution numerical solvers and adaptive mesh refinement (AMR) techniques, and can achieve an order of magnitude improvement in computational time compared to solvers using conventional uniform grids. After a thorough analysis of the mathematical models used to describe the complex behaviour of two-phase flows, the methodology was used with three specific models in order to evaluate the robustness and accuracy of the numerical schemes developed, and to assess the ability

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31

Brown, Harmony Rose. "Numerical simulations of stratified fluid flow over topography near resonance." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p1450159.

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Abstract (sommario):

Thesis (M.S.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed Mar. 25, 2008). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 83-85).

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32

Davis, Kevin S. (Kevin Scott) 1975. "Flow of nonuniformly stratified fluid of large depth over topography." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9409.

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33

Epifanio, Craig Charles. "High-drag states and lee vortices in stratified flow over topography /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/10072.

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34

Walker, Sharon Amanda. "The effect of time on interfacial mixing in density stratified flows." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361235.

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35

Roberts, Ian Frank. "Modelling and experimental studies of transient stratified multiphase flows." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/7433.

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36

Al-Gheithy, Ali Amor. "Modelling of transient flow and pressure behaviour in multilayer stratified reservoirs." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261209.

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37

SILVA, ALBERTO MILONE. "EXPERIMENTAL RESULTS OF INTERFACIAL SHEAR STRESS IN STRATIFIED GAS-LIQUID FLOW." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1991. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19314@1.

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Abstract (sommario):

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>O presente trabalho analisa experimentalmente o escoamento estratificado gás-líquido (ar-água) em um duto de seção retangular. Obteve-se uma correlação empírica para a tensão de cisalhamento na interface. Verifica-se que tal tensão, além de ser função dos números de Reynolds de ambos os escoamentos, depende também de características inerentes à fase líquida. Um perfil teórico de velocidade do gás foi comparado com os dados experimentais obtidos por anemometria para a região logarítmica. Foi realizada uma análise de incertezas, qu

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38

Podber, David P. "Modeling strongly stratified flow using the dynamic grid adaptation (DGA) technique /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487946776024051.

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39

Musiak, Jeffery Daniel. "Three-dimensional circulation dynamics of along-channel flow in stratified estuaries /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/6823.

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40

Lu, Zhiming. "Numerical simulation of internal waves in stratified fluid flow over topography." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/35028.

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The main purpose of this thesis is to investigate internal solitary wave generation and evolution in density-stratified fluid flows over both two-dimensional and three-dimensional bottom topographies using mainly numerical methods supported by some theoretical results. The numerical scheme to solve the forced KdV, KPII and KPI equation is a combination of the Runge–Kutta and Crank–Nicholson methods; a pseudo-spectral method is used to solve the two-dimensional fully nonlinear Euler equations in the streamfunction-vorticity form. The numerical results for a stratified flow over a two-dimensiona

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41

Aigner, Andreas 1972. "Numerical simulations of internal and inertial solitary waves." Monash University, Dept. of Mathematics and Statistics, 2001. http://arrow.monash.edu.au/hdl/1959.1/8880.

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42

Zhou, Jingnan. "Numerical studies of stably stratified planetary boundary-layer flows over topography and their parameterization for large scale numerical model." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq27395.pdf.

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43

Akiyama, Shinsaku. "Measurement of the flow past a sphere descending at a constant speed in a salt stratified fluid." Kyoto University, 2018. http://hdl.handle.net/2433/235086.

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44

Mathews, Tobias John. "Void structure, colloid and tracer transport properties of stratified porous media." Thesis, University of Plymouth, 1999. http://hdl.handle.net/10026.1/2794.

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The characterisation of the properties of porous materials is of great importance in the effective management of natural and manmade systems. A sophisticated network model, 'Pore-Cor', of some of these properties has been previously developed. The present study has significantly extended the scope of the model's predictive capabilities. Flow and transport behaviour was examined in laboratory sand columns of various depths. These experiments examined unsaturated flow of water and conservative solute tracer transport through homogeneous sand samples. Flow through these was not homogeneous or rep

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45

Badeau, Allen E. "A droplet formation and entrainment model for stratified liquid-liquid flows." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1737.

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Thesis (M.S.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains xiii, 150 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 140-144).

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46

Bambrey, Ross R. "Strong interactions between two co-rotating vortices in rotating and stratified flows /." St Andrews, 2007. http://hdl.handle.net/10023/341.

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47

LIMA, HELENA ASSAF TEIXEIRA DE SOUZA MOTA. "FLOW SIMULATION OF MACRO-EMULSION FLOODING AT STRATIFIED RESERVOIRS CONSIDERING CAPILLARY EFFECTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2016. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=28384@1.

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PETRÓLEO BRASILEIRO S. A.<br>O aumento do fator de recuperação e o uso de métodos de recuperação avançada no atual cenário de novos patamares de preços representam um enorme desafio para a indústria do petróleo. Neste contexto, o uso de emulsões óleo-água como um método de recuperação avançada torna-se bastante atrativo. Diversos trabalhos mostraram um aumento no volume de óleo produzido através da injeção de emulsões óleo-água. Resultados de pesquisas experimentais indicam que a injeção de emulsões pode ser utilizada como agente de controle de mobilidade, bem como reduzindo a saturação residu

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48

CAMPOS, DEIBI ERIC GARCÍA. "STUDY OF INSTABILITY OF INTERFACIAL WAVES IN STRATIFIED LAMINAR-LAMINAR CHANNEL FLOW." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2018. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=34760@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>AGÊNCIA NACIONAL DE PETRÓLEO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>No presente trabalho estudou-se numericamente a instabilidade das ondas na interface do escoamento estratificado de água e óleo em um canal plano. Esse padrão de escoamento, associado ao estágio inicial da formação de golfada, é comum em aplicações industriais, de áreas como produção de petróleo, nuclear, química e muitas outras. Através da introdução de perturbações controladas na interface do escoamento estra

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49

Lim, Kahn Yung 1976. "Trapped disturbances and effects of tropopause height in stratified flow over topography." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/89314.

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50

Nguyen, Duy. "An Investigation Of The Effect Of Meanders On Thermally Stratified Riverine Flow." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29567.

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This thesis describes the influences of meander geometrics on thermally stratified open-channel flow. Results of this study contribute toward a greater understanding of the physical characteristics of flow in riverine environments. The presence of thermal stratification due to short-wave solar heating from above inhibits mixing, resulting in oxygen stratification and accumulation of contaminants and nutrients - conditions that have been found to cause long-term damage to the ecosystems. Reduced flow rates can also lead to acute damage events such as cyanobacterial outbreaks and mass fish kill

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