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Dissertations / Theses on the topic 'Physical flows'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Harbottle, D. "Physical modelling of colloidal slurry flows." Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/673/.

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The study looks at the rheology and pipeline flow properties of colloidal suspensions dispersed in electrolytes of different concentration and type. Fuso silica spheres (0.8pm) form the dispersed phase of the suspension, and KN03, KCI electrolytes the continuous phase. The strength of the particle-particle interaction is significantly influenced by the electrolyte concentration. An increase in the electrolyte concentration from 10 4M to IM results in the formation of aggregates, thus influencing the sedimentation, sediment bed structure and pipeline transportation properties. Silica aggregates

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Raiford, John Phillip. "Numerical and physical modeling of turbulent shear flows." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181669456/.

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3

Day, Jason J. "Topologically Mixing Suspension Flows." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8389.

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We find a set of conditions on a roof function to ensure topological mixing for suspension flows over a topological mixing base. In the measure theoretic case, such conditions have already been established for certain flows. Specifically, certain suspensions are topologically mixing if and only if the roof function is not cohomologous to a constant. We show that an analogous statement holds to establish topological mixing with the presence of dense periodic points. Much of the work required is to find properties specific to the equivalence class of functions cohomologous to a constant. In

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4

Kim, Hyoungbae 1969. "Physical modelling of two phase flows in ladle-shroud systems." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20914.

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The onset of a 'late' rotating vortex over an off-centre drain nozzle at 2/3 radius was studied in an 1160-mm diameter tank. It was found that using a sloped bottom ladle could be beneficial in terms of steel yield, provided the exit nozzle is located 'centrically'.<br>Miner modification of the nozzle (skewed nozzle) to impart a radial component of velocity to the spinning vortex core was found to be effective in making AMEPA system sensitive to early slag entrainment phenomena by diverting the core away from the central vertical axis of the nozzle.<br>A 0.75 scale water model was constructed

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Kim, Hyoungbae. "Physical modelling of two phase flows in ladle-shroud systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0029/MQ50631.pdf.

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6

Scully, Malcolm E. "Modeling of Critically-Stratified Gravity Flows: Application to the Eel River Continental Shelf, Northern California." W&M ScholarWorks, 2001. http://www.vims.edu/physical/projects/CHSD/publications/reports/S2001%5FMS.pdf.

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7

Lei, Siu Long. "Phase-field simulations of two-phase flows /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MATH%202009%20LEI.

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8

Papadopoulos, Konstantinos. "Theoretical frameworks for the upscaling of physical interactions in aquatic mobile-boundary flows." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=233119.

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The objective of this thesis is the development of a unifying framework for the integration and upscaling of the fluid mechanical, ecological and biomechanical processes occurring in aquatic flows. Particular focus is on the interactions of the fluid motion with aquatic plants and sediments in aquatic systems. Appropriately formulated coupled conservation equations are developed for fluid, sediment, and plant motions. The starting points for their derivation are the continuity and momentum equations written for instantaneous local field variables, for fluid, sediment and aquatic plants. The eq

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Aburub, Ala Sami. "Visuomotor control of locomotor steering in stroke: effects of differing optic flows and goal locations." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114548.

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Persons with stroke face difficulties in walking that are characterized by a slow speed and difficulties adapting the walking pattern to contextual demands. Changing the direction of walking (steering) can be challenging, especially when exposed to complex visual information. It was previously demonstrated that persons with stroke display altered steering behaviors when exposed to changing optic flows. Whether these alterations persist in goal-directed walking and whether they can be explained by the presence of a perceptuo-motor disorder remain unknown. The purpose of this study was to compar

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10

San, Omer. "Multiscale Modeling and Simulation of Turbulent Geophysical Flows." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/28031.

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The accurate and efficient numerical simulation of geophysical flows is of great interest in numerical weather prediction and climate modeling as well as in numerous critical areas and industries, such as agriculture, construction, tourism, transportation, weather-related disaster management, and sustainable energy technologies. Oceanic and atmospheric flows display an enormous range of temporal and spatial scales, from seconds to decades and from centimeters to thousands of kilometers, respectively. Scale interactions, both spatial and temporal, are the dominant feature of all aspects of gene

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11

Mantilla, Ricardo. "Physical basis of statistical scaling in peak flows and stream flow hydrographs for topologic and spatially embedded random self-similiar channel networks." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3273720.

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12

Bian, Yuan. "Tactical production planning for physical and financial flows for supply chain in a multi-site context." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0064/document.

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En période de crise financière, les entreprises ont besoin de trésorerie pour réagir efficacement aux aléas et assurer leur solvabilité. Cette thèse se situe à l’interface entre l’opérationnel et la finance pour développer des modèles de planification tactique gérant simultanément les flux physiques et financiers dans la supply chain. Le coût de financement des opérations basé sur le besoin en fond de roulement (BFR) est intégré comme un nouvel aspect financier jamais considéré dans la littérature de lot-sizing. Nous débutons par une extension du modèle EOQ considérant les coûts de financement

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13

Gifford, Andrew R. "The Physical Mechanism of Heat Transfer Augmentation in Stagnating Flows Subject to Freestream Turbulence and Related Studies." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26097.

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The mechanism of heat transfer augmentation due to freestream turbulence in classic Hiemenz stagnation flow was studied experimentally for the first time using time-resolved digital particle image velocimetry (TRDPIV) and a new thin film heat flux sensor called the Heat Flux Array (HFA). Unique measurements of simultaneous, time-resolved velocity and surface heat flux data were obtained along the stagnation line on a simple, rectangular flat plate model mounted in a water tunnel facility. Identification and tracking of coherent structures in the stagnation region lends support to the theory th

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14

Hejazi, Kourosh. "Three-dimensional numerical and physical modelling of coastal hydro-environments : turbulent stratified flows in estuarine harbours and barrages." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/104358/.

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An arbitrary Lagrangian-Eulerian (ALE) three-dimensional hydrodynamic free-surface numerical model has been developed based on the time-dependent Reynolds-averaged Navier-Stokes (RANS) equations and the finite volume method (FVM). The model with non-hydrostatic pressure distribution and a structured nonorthogonal curvilinear staggered mesh is capable of simulating non-homogeneous stratified flows and problems involving complex bathymetry. A projection method is deployed for solving the set of the equations, and a buoyant k-ε turbulence model is included in the numerical model. Six new advectio

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Simiriotis, Nikolaos. "Numerical study and physical analysis of electroactive morphing wings and hydrodynamic profiles at high Reynolds number turbulent flows." Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0041.

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La présente thèse étudie par simulation numérique et analyse physique les effets du morphing électroactif pour le design des ailes du futur permettant de réduire l’impact environnemental et d’accroître l’efficacité du transport aérien. La thèse examine les effets du morphing électroactif hybride. Ce concept consiste en une association de diverses classes d’actionneurs électroactifs opérant à des échelles de temps et de longueur multiples, en accord avec la dynamique du spectre turbulent et dans un contexte de bio-inspiration concernant l’actionnement des ailes, ailerons et plumes de grands ois

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Garcia-Hermosa, M. Isabel. "Morphodynamics of sand mounds in shallow flows." Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:c6ef38f8-d098-4ce5-b0f0-38e2ebe6caf5.

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Large-scale bed features are often encountered in coastal waters, and include sandbanks and spoil heaps. The morphodynamic development of such features involves complicated nonlinear interactions between the flow hydrodynamics, sediment transport, and bed profile. Numerical modelling of the morphodynamic evolution and migration of large-scale bed features is necessary in order to understand their long-term behaviour in response to changing environmental conditions. This thesis describes detailed measurements of the morphodynamics of sand mounds in unidirectional and oscillatory (tidal) flows,

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Allen, Eric B. "Dendrochronology in Northern Utah: Modeling Sensitivity and Reconstructing Logan River Flows." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1716.

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Semi-arid valleys in northern Utah are home to the majority of the state population and are dependent upon winter snowpack in surrounding mountains for water for irrigation, hydropower and municipal use. Water is delivered to the urban areas in the spring as discharge in rivers draining the mountains. Understanding the natural variability and cycles of wet and dry periods enables water managers to make informed water allocations. However, the complex regional climate teleconnections are not well understood and the shortness of the instrumental period does not allow for a full understanding

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18

Papageorgiou, Asterios. "A physical accounting model for monitoring material flows in urban areas with application to the Stockholm Royal Seaport district." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231160.

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There is a plethora of methods and tools that can be used for the assessment of Urban Metabolism. Nevertheless, there is no standardized method for accounting of material flows within and across the boundaries of urban systems. This thesis aims to provide a physical accounting model for monitoring material flows in urban areas that could potentially become the basis for the development of a standardized accounting method in the long term. The model is based on a Physical Input Output Table framework and builds upon the strengths of existing accounting methods but at the same time it demonstrat

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Przydrozna, Aleksandra Anna. "Filling flows induced by a convector in a room." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277224.

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Over the last two centuries, there has been a continual evolution of how occupied rooms are heated, with inventors competing to design new heating devices. In particular, there is a wide range of convector types, which vary in shape, size, design, material, operating medium and application. With approximately 190 million convectors installed in the UK alone, the question arises regarding the dependencies on the efficiency of heat distribution through convector-induced filling flows. A standard approach to evaluate convector performance is based on the convector strength only, the implication b

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20

Piedra, Miguel M. "Flume investigation of the effects of sub-threshold rising flows on the entrainment of gravel beds." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2134/.

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Recent research on sediment transport in gravel bed rivers shows evidence of the influence of sub-threshold flow history on values of entrainment thresholds (Paphitis and Collins, 2005; Monteith and Pender, 2005; Haynes and Pender, 2007; Haynes and Ockelford, 2008). The research presented here analyses the effect of the characteristics of hydrograph rising limbs (flow magnitude and duration) on entrainment thresholds of gravel beds, with discharges ranging from 0.25-1.6 times the estimated bed threshold flow and durations from 0.5h to 6h. This analysis uses results from flume experimentation.

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21

Öbrink, Anton, and Leila Kian. "Flows and Bottlenecks : Study of the physical flow of goods to and from the Region of Jönköping County and the possible bottlenecks." Thesis, Högskolan i Jönköping, Internationella Handelshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-9746.

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A considerable amount of research has concentrated on the modes of transportation. Research has tended to focus on the growth and trends of the different modes of transportation on the national scale. Very little research has been undertaken into each region, and even less on those factors that prevent or act as barriers for transportation of goods in each region. Furthermore, very little research has been undertaken that examines the bottlenecks of the transportation flows in Jönköping. By interviewing the main actors in the region, this thesis identifies the main product flow in the Jönköpin

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22

Williams, Paul David. "Nonlinear interactions of fast and slow modes in rotating, stratified fluid flows." Thesis, University of Oxford, 2003. http://ora.ox.ac.uk/objects/uuid:5365c658-ab60-41e9-b07b-0f635909835e.

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This thesis describes a combined model and laboratory investigation of the generation and mutual interactions of fluid waves whose characteristic scales differ by an order of magnitude or more. The principal aims are to study how waves on one scale can generate waves on another, much shorter scale, and to examine the subsequent nonlinear feedback of the short waves on the long waves. The underlying motive is to better understand such interactions in rotating, stratified, planetary fluids such as atmospheres and oceans. The first part of the thesis describes a laboratory investigation using a r

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Tuinstra, Annejet. "Post-Wildfire Debris Flows: Mapping and Analysis of Risk Factors in Western North America." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446352.

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Climate change is leading to in an increase in frequency and severity of wildfires, which in turn can result in the formation of runoff-initiated post-wildfire debris flows. This type of debris flows is, like most debris flows, triggered by heavy precipitation events. Debris flows have the potential to cause much damage, and therefore it is important to analyse when and where the risk of these flows exists. This study aims to identify shared characteristics of basins that experienced post-wildfire debris flows in order to improve future risk analyses regarding such flows. These characteristics

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Hristova, Hristina G. "Stability of large-scale oceanic flows and the importance of non-local effects." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/52761.

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Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2009.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 207-211).<br>My thesis covers two general circulation problems that involve the stability of largescale oceanic flows and the importance of non-local effects. The first problem examines the stability of me

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Kamaludin, Adzhar. "A simulation approach for modelling and investigation of inventory inaccuracy in warehouse operation." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6750.

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This thesis is focused on a simulation modelling approach to address the inventory inaccuracy problems in a warehouse operation. The main motivation which led to this research was a desire to investigate the inventory inaccuracy issues that have been highlighted by a logistics company. Previous and current research into inventory inaccuracy issues is largely related to the development of RFID technology as a possible solution to inventory problems. Since the inventory inaccuracy related to RFID technology is focused on the overall measurement of inventory management and retail business, there

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Andersson, Peter. "Fast-Neutron Tomography using a Mobile Neutron Generator for Assessment of Steam-Water Distributions in Two-Phase Flows." Doctoral thesis, Uppsala universitet, Tillämpad kärnfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-222459.

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This thesis describes the measurement technique of fast-neutron tomography for assessing spatial distributions of steam and water in two-phase flows. This so-called void distribution is of importance both for safe operation and for efficient use of the fuel in light water reactors, which compose the majority of the world’s commercial nuclear reactors. The technique is aimed for usage at thermal-hydraulic test loops, where heated two-phase flows are being investigated under reactor-relevant conditions. By deploying portable neutron generators in transmission tomography, the technique becomes ap

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Shibuo, Yoshihiro. "Modelling water and solute flows at land-sea and land-atmosphere interfaces under data limitations." Doctoral thesis, Stockholm : Department of Physical Geography and Quaternary Geology, Stockholm University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6834.

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28

Altimiras-Martin, Aleix. "Managing human-induced material use : adding cyclic inter-sectoral flows to Physical Input-Output Tables to analyse the environmental impact of economic activity." Thesis, University of Cambridge, 2016. https://www.repository.cam.ac.uk/handle/1810/253780.

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Current human activity is degrading the environment and depleting biotic and abiotic resources at unheard-of rates, inducing global environmental change and jeopardising the development of humankind. The structure of human activity determines which resources are extracted, how they are transformed and where and how they are emitted back to the environment. Thus, the structure of human activity ultimately determines the human-Earth System interaction and human-induced environmental degradation. Several theories and empirical findings suggest that a cyclic structure would lower the resource requ

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Bouratsis, Polydefkis. "Scour at the Base of Hydraulic Structures: Monitoring Instrumentation and Physical Investigations Over a Wide Range of Reynolds Numbers." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/71880.

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Hydraulically induced scour of the streambed at the base of bridge piers is the leading cause of bridge failures. Despite the significant scientific efforts towards the solution of this challenging engineering problem, there are still no reliable tools for the prediction and mitigation of bridge scour. This shortcoming is attributed to the lack of understanding of the physics behind this phenomenon. The experimental studies that attempted the physical investigation of bridge scour in the past have faced two main limitations: i) The characterization of the dynamic interaction between the flow a

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Giljum, Stefan, Monika Dittrich, Franz Stephan Lutter, and Mirko Lieber. "Global patterns of material flows and their socio-economic and environmental implications: a MFA study on all countries world-wide from 1980 to 2009." MDPI, 2014. http://epub.wu.ac.at/5322/1/resources%2D03%2D00319.pdf.

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This paper assesses world-wide patterns of material extraction, trade, consumption and productivity based on a new data set for economy-wide material flows, covering used materials for all countries world-wide between 1980 and 2009. We show that global material extraction has grown by more than 90% over the past 30 years and is reaching almost 70 billion tonnes today. Also, trade volumes in physical terms have increased by a factor of 2.5 over the past 30 years, and in 2009, 9.3 billion tonnes of raw materials and products were traded around the globe. China has turned into the biggest

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31

Buffon, Patricia. "Aplicabilidade dos conceitos de competência do escoamento e de capacidade de transporte às correntes de turbidez." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/180694.

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Os conceitos de competência do escoamento e de capacidade de transporte foram desenvolvidos para escoamentos fluviais e acabam sendo transferidos para a modelagem de correntes de turbidez. No entanto, não é claro até que ponto o estabelecimento de analogias entre o ambiente fluvial e as correntes de turbidez pode ser realizado. Nesse contexto, o principal objetivo deste trabalho foi avaliar os conceitos de competência e de capacidade nas correntes de turbidez. O estudo foi desenvolvido experimentalmente, em um canal de inclinação variável de 4 m de comprimento, 40 cm de altura e 12 cm de largu

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Walther, Suzanne Corinna. "Remote measurement of gravel-bed river depths and analysis of the geomorphic response of rivers to canals and small dams." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11069.

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xviii, 128 p. : ill. (some col.)<br>This dissertation investigates the potential impacts of canals and small dams on gravel-bed rivers and methods for documenting those impacts. First, I evaluate the potential for mapping channel depths along the McKenzie River, OR, using 10 cm resolution optical aerial imagery with a hydraulically-assisted bathymetry (HAB-2) model. Results demonstrate that channel depths can be accurately mapped in many areas, with some imagery limitations. The HAB-2 model works well in the majority of the river (R 2 =0.89) when comparing modeled to observed depths, but not i

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Paleo, Cageao Paloma. "Fluid-particle interaction in geophysical flows : debris flow." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/27808/.

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Small scale laboratory experiments were conducted to study the dynamic mor- phology and rheological behaviour of fluid-particle mixtures, such as snout-body architecture, levee formation, deposition and particle segregation effects. Debris flows consist of an agitated mixture of rock and sediment saturated with water. They are mobilized under the influence of gravity from hill slopes and channels and can reach long run-out distance and have extremely destructive power. Better understanding of the mechanisms that govern these flows is required to assess and mitigate the hazard of debris flows a

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Santos, Cely Martins dos. "A viabilização de softwares comerciais na roteirização de veículos de serviços de entregas, visando a geração de respostas rápidas e eficientes." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-26012018-183754/.

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Este trabalho foi motivado pela necessidade de otimização nos serviços de entregas urbanas combinados com o alto custo de implantação e customização da maioria dos pacotes disponíveis comercialmente, que muitas empresas se defrontam, na expectativa de obtenção de respostas rápidas e eficientes, numa base diária. Geralmente a utilização destes software requerem grandes investimentos de tempo e recursos. Os custos operacionais do transporte de cargas têm experimentado um aumento expressivo devido a fatores que, de uma forma ou de outra, impedem o fluxo eficiente dos veículos na rede, tomando evi

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Pathmathas, Thirunavukkarasu. "Granular flow modelling of rotating drum flows using positron emission particle tracking." Doctoral thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15707.

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Tumbling mills are characterized by a flowing granular mixture comprising slurry, ore and grinding media. Akin to fluid flow, a rheological description underpinning granular flow has long been expected and pursued by many researchers. Unfortunately, no single theory has hitherto been able to successfully describe all the peculiar features and flow phases of granular systems. Tumbling mills exhibit a rich coexistence of all known flow phases and is arguably the most complicated of the granular flow geometries. Not surprisingly, current comminution models are almost entirely empirical with limit

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Saneecharaun, Jeet T. "Development of a current to pressure (I/P) converter. System analysis of a current to pressure (I/P) converter through physical modelling and experimental investigation, leading to a design for improved linearity and temperature independence." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/7823.

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Current-to-pressure (I/P) converters are pneumatic devices which provide precise control of pressure in various industries – for example these devices are often used in valve positioner systems (typically found in the oil and gas industry) and tensioning systems (typically used in the packaging industry). With an increasing demand for such devices to operate in harsh environments all by delivering acceptable performance means that Current-to-pressure converters need to be carefully designed such that environmental factors have no or minimal effects on its performance. This work presents an inv

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Die, Moran Andrés. "Physical and numerical modelling investigation of induced bank erosion as a sediment transport restoration strategy for trained rivers : the case of the Old Rhine (France)." Thesis, Paris Est, 2012. http://www.theses.fr/2012PEST1125.

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La dynamique sédimentaire des rivières, souvent modifiée par les aménagements, n'a pas été considérée comme un facteur significatif pour la qualité des environnements riverains et dans les stratégies de restauration. Les approches destinées à restaurer la charge sédimentaire d'une rivière afin qu'elle soit compatible avec les besoins environnementaux et humains, en termes de quantité de sédiments et de granulométrie, sont encore peu développées. De plus, les approches existantes telles que l'injection de sédiments sont souvent coûteuses et nécessitent une intervention humaine. Cette thèse port

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Sekhar, Susheel Kumar. "Viscous hypersonic flow physics predictions using unstructured Cartesian grid techniques." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45857.

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Aerothermodynamics is an integral component in the design and implementation of hypersonic transport systems. Accurate estimates of the aerodynamic forces and heat transfer rates are critical in trajectory analysis and for payload weight considerations. The present work seeks to investigate the ability of an unstructured Cartesian grid framework in modeling hypersonic viscous flows. The effectiveness of modeling viscous phenomena in hypersonic flows using the immersed boundary ghost cell methodology of this solver is analyzed. The capacity of this framework to predict the surface physics in

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Egret, Paul. "Synchronisation des flux physiques et financiers : mise en évidence de l'échec du déploiement d'un ERP au travers d'une étude de cas." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-01059804.

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La synchronisation des flux physiques a reçu une importante attention dans la littérature. Si le non flux physique a reçu une attention toute particulière dans des domaines tels que le SCM, le pendant financier a longtemps était délaissé. Plus inquiétant, les délais de paiement ont longtemps été perçus comme un moyen de réduction du besoin en fonds de roulement des grandes entreprises. La crise des Subprimes a eu de lourdes conséquences sur le financement des entreprises les plus modestes, mettant en danger l'existence même de ces dernières. Notre travail initial de synchronisation des flux ph

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Magirl, Christopher Sean. "Bedrock-controlled Fluvial Geomorphology and the Hydraulics of Rapids on the Colorado River." Diss., The University of Arizona, 2006. http://www.gcmrc.gov/library/reports/physical/Coarse_Sed_Webb/Magirl2006a.pdf.

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Palmisano, Liviana. "Sur les applications du cercle avec un intervalle plat et flots de Cherry." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01037876.

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Dans cette thèse nous donnons une description complète de la dynamique d'une classe L de fonctions de degré un du cercle, supposées de classe (deux fois dérivable) C^2 à l'exception de deux points où seule la continuité est exigée, et telles qu'elles soient constantes sur un des intervalles délimité par ces derniers. De plus sur des demi-voisinages ouverts de ces points elles s'écrivent sous la forme x^l où l est un nombre réel positif appelé l'exposant critique de la fonction. Dans le chapitre 2 nous montrons pour la sous-classe de L des fonctions dont le nombre de rotation est de type borné,

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42

Crawford, Alasdair James. "A Chemistry Neutral Flow Battery Performance Model Development, Validation, and Application." Thesis, Portland State University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10096820.

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<p> A physical model for redox flow batteries is developed to estimate performance for any chemistry using parameters such as electrolyte conductivity and kinetic rate constants. The model returns the performance as a function of flow rate, current density, and state of charge. Two different models are developed to estimate the current density distribution throughout the electrode in order to evaluate physical performance of the battery. This is done using electrochemical parameters such as conductivity and kinetic rate constant. The models are analytical in order to produce a computationally

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43

Taverner, S. "Bifurcation in physical systems." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375327.

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Akella, Ravi Chandra. "Information flow properties for cyber-physical systems." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Akella_09007dcc806406a3.pdf.

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Thesis (M.S.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 15, 2009) Includes bibliographical references (p. 34-36).

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Santhanakrishnan, Arvind. "CHARACTERIZATION AND FLOW PHYSICS OF PLASMA SYNTHETIC JET ACTUATORS." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_diss/545.

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Plasma synthetic jet actuators are investigated experimentally, in which the geometrical design of single dielectric barrier discharge (SDBD) plasma actuators is modified to produce zero-mass flux jets similar to those created by mechanical devices. The SDBD plasma actuator consists of two rectangular electrodes oriented asymmetrically and separated by a layer of dielectric material. Under an input of high voltage, high frequency AC or pulsed DC, a region of plasma is created in the interfacial air gap on account of electrical breakdown of the ambient air. A coupling between the electric field

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Lau, Sze Chun Gary. "Physical characteristics of flocs in water treatment processes." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444945/.

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Aluminium sulphate, calcium nitrate, and two cationic polymers have been used to coagulate and flocculate dilute kaolin and latex suspensions (< 100 mg/1) in a stirred vessel. The effects of the different destabilising agents on the resulting floes have been monitored using a simple continuous optical technique based on turbidity fluctuations and the behaviour of these floes under shear conditions and the possibility of subsequent floe re-formation have been investigated. The results showed vast differences in behaviour regarding to floe breakage and re formation between the systems. For a low

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Estep, Joseph Jeremiah. "Analog and numerical experiments investigating force chain influences on the bed physics of dense granular flows." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51768.

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Granular materials are composed of solid, discrete particles and exhibit mechanical properties that range from fluid to solid behavior. Some of the complexity exhibited by granular systems arises due to the long-range order that develops due to particle-particle contact. Inter-particle forces in granular materials often form a distributive network of filamentary force-accommodating chains (i.e. force chains), such that a fraction of the total number of particles accommodates the majority of the forces in the system. The force chain network inherent to a system composed of granular materials co

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48

Jepson, D. M. "Vertical annular flow : the effects of physical properties." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316862.

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Kenny, Melissa Carol. "Structural and Physical Characterization of Insect Flow Systems." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/101550.

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This dissertation characterizes the geometry, kinematics, and physical properties of insect internal structures that make up the respiratory and circulatory systems. This characterization is necessary to better understand how these systems function to transport fluids at the microscale, and ultimately, how we might computationally model this flow. Chapter 2 describes the geometry of the insect tracheal system, specifically testing if Murray's law applies to this system using three-dimensional imaging of tracheal tubes. Chapter 3 begins to characterize the physical properties of insect hemolymp

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Burgess, Don Edward. "Topics in Hele-Shaw flows /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487682558443754.

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