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Rozprawy doktorskie na temat „Reynolds's number”

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Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Tam, Daniel See Wai 1980. "Motion at low Reynolds number." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/49682.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2008.<br>Includes bibliographical references (p. 181-192).<br>The work described in this thesis centers on inertialess motion at low Reynolds numbers at the crossroad between biofluids and microfluids. Here we address questions regarding locomotion of micro-swimmers, transport of nutrient around micro-organisms as well as mixing and heat exchange inside micro-droplets of water. A general framework for the investigation of optimal locomotion strategies for slender swimmers has been developed and appli

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2

Slim, Anja Catharina. "High Reynolds number gravity currents." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614096.

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3

Srinivasa, Murthy P. "Low Reynolds Number Airfoil Aerodynamics." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/229.

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In this thesis we describe the development of Reynolds- averaged Navier Stokes code for the flow past two- dimensional configuration. Particularly, emphasis has been laid on the study of low Reynolds number airfoil aerodynamics. The thesis consists of five chapters covering the back ground history, problem formulation, method of solution and discussion of the results and conclusion. Chapter I deals with a detailed background history of low Reynolds number aerodynamics, problem associated with it, state of the art, its importance in practical applications in aircraft industries. Chapte

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4

Srinivasa, Murthy P. "Low Reynolds Number Airfoil Aerodynamics." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/229.

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In this thesis we describe the development of Reynolds- averaged Navier Stokes code for the flow past two- dimensional configuration. Particularly, emphasis has been laid on the study of low Reynolds number airfoil aerodynamics. The thesis consists of five chapters covering the back ground history, problem formulation, method of solution and discussion of the results and conclusion. Chapter I deals with a detailed background history of low Reynolds number aerodynamics, problem associated with it, state of the art, its importance in practical applications in aircraft industries. Chapter II d

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5

Giacobello, Matteo. "Wake structure of a transversely rotating sphere at moderate Reynolds numbers." Online version, 2005. http://repository.unimelb.edu.au/10187/2840.

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Over the last century, the problem of a viscous flow past a sphere has received on-going attention due to its many engineering applications. These include combustion processes, sediment transport processes and atmospheric flow problems, where the sphere serves as a good model for more general bluff body particles. In these environments, particles may be subjected to both translational and rotational velocities. The objective of this study was to investigate the effect that sphere rotation, about an axis transverse to the freestream flow, has on the characteristics or the vertical wake struc

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6

Wales, Christopher John Alasdair. "Continuation methods for high Reynoldss number compressible flows." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529897.

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7

Chebbi, Brahim. "Experiments in low Reynolds number flows." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5989.

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8

Erm, Lincoln. "Low-Reynolds-number turbulent boundary layers /." Connect to thesis, 1988. http://eprints.unimelb.edu.au/archive/00000226.

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9

Stevens, Patrick Robert Robbie James. "Unsteady low Reynolds number aerodynamic forces." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709135.

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10

Banks, Curtis Alwyn. "Instabilities in high Reynolds number flows." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/29416.

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An asymptotic method for predicting stability characteristics, both stationary and travelling crossflow vortices, over a variety of surface variations was created. These include flat, convex and concave curved surfaces. Comparisons were made with two different numerical methods (Parabolised Stability Equations and Velocity-Vorticity) and good agreement, to within 5% of the numerical value of the crossflow mode streamwise growth rate was met for both stationary and travelling modes initially for a flat surface. An additional comparison was made with the streamwise growth rates to observe the im

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11

Box, Stuart James. "Rotational motion at low Reynolds number." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688351.

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Driven cyclic or periodic motion is a recurrent feature of many of the microscopic mechanical systems that support life. For example, fields of cilia, nano-scale hair-like structures, beat together to transport fluids though mammalian tracts. Bacteria and other micro-organisms are able to swim using similar organelles known as flagella, while "molecular motors" provide traction in muscle tissue. These mechanisms rely on the hydrodynamics and statistical mechanics of driven cyclic motion at the micro-scale. The purpose of this thesis is to investigate these principles in an abstract sense, in o

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12

Dandy, David Stewart Leal L. Gary. "Intermediate Reynolds number free-surface flows /." Diss., Pasadena, Calif. : California Institute of Technology, 1987. http://resolver.caltech.edu/CaltechETD:etd-03042008-083806.

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13

Samson, Ophir. "Low Reynolds number swimming in complex environments." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5723.

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The study of swimming micro-organisms has been of interest not just to biologists, but also to fluid dynamicists for over a century. As they are rarely in isolation, much interest has been focused on the study of the swimmers’ interaction with their environment. By virtue of the typically small sizes of these organisms and their swimming protocols, the characteristic Reynolds number of the motion of the fluid around them is small. Hence they reside in a Stokes flow regime where viscous forces dominate inertial effects and where far-field interactions (e.g. with nearby walls) can have a signifi

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14

Yu, Tony S. (Tony Sheung). "Elastic tail propulsion at low Reynolds number." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38700.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.<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. 73-76).<br>A simple way to generate propulsion at low Reynolds number is to periodically oscillate a passive flexible filament. Here we present a macroscopic experimental investigation of such a propulsive mechanism. A robotic swimmer is constructed and both tail shape and propulsive force are measured. Filament

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15

Lim, Choon Peng. "Experimental investigation of vortex shedding in high Reynolds number flow over compressor blades in cascade." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FLim.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, March 2003.<br>Thesis advisor(s): Garth V. Hobson, Raymond P. Shreeve. Includes bibliographical references (p. 81-82). Also available online.

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16

Souza, Edimilson. "Consumo de potência para impelidores rápidos aplicados em processos de agitação e mistura." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266861.

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Orientador: José Roberto Nunhez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T04:29:50Z (GMT). No. of bitstreams: 1 Souza_Edimilson_D.pdf: 42879503 bytes, checksum: f045a81ccffc27a6b322cd000bb460cd (MD5) Previous issue date: 2011<br>Resumo: O projeto de agitadores envolve um grande número de variáveis, além da necessidade de utilização das relações empíricas para que se possa elaborar um projeto eficiente. Em função do grande número de variáveis envolvidas, muitas opções ainda carecem de estudos científicos

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17

Shirley, Gregory B. (Gregory Brenton) 1975. "An experimental investigation of a low Reynolds number, high Mach number centrifugal compressor." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9665.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.<br>Includes bibliographical references (p. 119-120).<br>Experiments were performed on a super-scale test facility to study the performance of very small centrifugal compressors suitable for microfabrication. ThE test facility was 75 times larger than the full-scale device and operated under 17/5 atmospheric pressure conditions to correctly match the Reynolds number, which is about 20,000. The impeller tip speed of the test facility matched those in the design full-scale device to capture the effe

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18

Hall, Jeremiah. "Low Reynolds number aerodynamics for micro aerial vehicles." 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:1448684.

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19

Nelson, Joshua T. "Practical modification for low Reynolds number propeller applications." Thesis, Wichita State University, 2009. http://hdl.handle.net/10057/2514.

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Applications for Unmanned Aerial Vehicles (UAV) and, specifically, Micro Aerial Vehicles (MAV) are increasing. As is the case for all aircraft, propulsion plays a significant factor in overall vehicle performance. Most small UAV or MAV propellers are commercial, off-the-shelf products given their availability and low cost. Unfortunately, the off-the-shelf propellers are not tailored to a specific vehicle and/or mission. Only limited technical and performance data is available for the propellers. A number of modifications have been used on larger (manned) aircraft propellers and rotors in the p

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20

Usui, Michiko. "AEROMECHANICS OF LOW REYNOLDS NUMBER INFLATABLE/RIGIDIZABLE WINGS." UKnowledge, 2004. http://uknowledge.uky.edu/gradschool_theses/321.

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Use of an inflatable/rigidizable wing is explored for Mars airplane designs. The BIG BLUE (Baseline Inflatable-wing Glider Balloon Launched Unmanned airplane Experiment) project was developed at the University of Kentucky, with an objective to demonstrate feasibility of this technology with a flight-test of an high-altitude glider with inflatable/rigidizable wings. The focus of this thesis research was to design and analyze the wing for this project. The wings are stowed in the fuselage, inflate during ascent, and rigidize with exposure to UV light. The design of wings was evaluated by using a

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21

Gough, Tim. "Low Reynolds number turbulent boundary layers and wakes." Thesis, University of Surrey, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360949.

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22

Guneratne, Julie Clare. "High Reynolds number flow in a collapsible channel." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340767.

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23

Chan, Brian 1980. "Propulsion devices for locomotion at low-Reynolds number." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27065.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Includes bibliographical references (leaves 65-66).<br>We have designed, built, and tested three novel devices that use low-Reynolds number flows for self propulsion. The three-link swimmer is designed to swim through in a free viscous fluid using cyclic flipping motion of two rigid fins attached to a rigid midsection. Robosnail 1 uses lubrication pressures underneath a flexible, sinusoidally waving boundary to generate thrust, and Robosnail 2 uses five independently controlled translating feet segm

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24

Hamel, Joshua M. "Hydrofoil static pressure acquisition at high Reynolds number." Thesis, Springfield, Va. : Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA403412.

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25

Bowersox, Rodney Dale Welch. "Compressible turbulence in a high-speed high Reynolds number mixing layer." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-171553/.

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26

Xu, Jin. "High Reynolds number simulation and drag reduction techniques : a thesis /." View online version; access limited to Brown University users, 2005. http://wwwlib.umi.com/dissertations/fullcit/3174698.

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27

Gilfoil, Wyly. "Smart Water Receiver for Use in the Wet Press Section of a Paper Machine." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7117.

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When the paper web and press felt enter a nip in the press section of a paper machine, both the paper web and felt are compressed. Water is forced from the paper sheet into the press felt due to a hydrodynamic pressure gradient between the sheet and felt. Water not only flows through the felt in the transversal z-direction, but also flows through the felt in the machine and cross-machine directions. On the exit side of the nip, the pressure imposed on the sheet-felt system by the rolls begins to decrease. Both the paper web and press felt begin to expand, and a vacuum is created in the web

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28

Mansour-Tehrani, Mehrdad. "Spacial distribution and scaling of bursting events in boundary layer turbulence over smooth and rough surfaces." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261297.

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29

Malik, Nadeem Ahmad. "Studies in turbulent dispersion using Kinematic Simulation." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385658.

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30

Trivilos, Epameinondas. "Performance and flow regimes in plane 2-D diffusers with exit channels at low Reynolds numbers." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03sep%5FTrivilos.pdf.

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Thesis (Mechanical Engineer and M.S. in Mechanical Engineering)--Naval Postgraduate School, September 2003.<br>Thesis advisor(s): Knox T. Millsaps. Includes bibliographical references (p. 79-80). Also available online.

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31

Childs, Laura Helen. "Low Reynolds number flows of generalized non-Newtonian fluids." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.633090.

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A Newtonian fluid is one for which the stress induced by flow is proportional to the strain rate, with the constant of proportionality being the fluid's viscosity. Fluids not adhering to this linear relationship are described as non-Newtonian. This thesis considers several problems involving flows of generalized non-Newtonian fluids - where the effective viscosity is a nonlinear function of the strain rate - experiencing negligible inertial effects. First, we consider the flow of a power-law fluid through a rectangular duct. We propose a numerical method of solution, reliant on expressing the

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32

Howell, R. J. "Wake-separation bubble interactions in low Reynolds number turbomachinery." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604667.

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There is a continual demand for a reduction in the cost and weight of aero-engines. Suppliers of engines always need to reduce manufacturing costs and airlines want to carry more passengers or cargo. This thesis will show that reducing the number of blades in the low pressure turbine is a potent way of achieving both of these goals. Through a program of experimental and numerical work, it is shown how it is possible to reduce the number of blades in the turbine by approximately 15% relative to the first generation of high lift blading employed in the BMW Rolls-Royce BR715 low pressure turbine.

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33

Davenport, W. J. "Separation bubbles at high Reynolds number : measurement and computation." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232788.

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34

Jones, Anya Rachel. "Unsteady low Reynolds number aerodynamics of a waving wing." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608953.

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35

Kirby, Simon. "High Reynolds number flow : past configurations of multiple blades." Thesis, University of East Anglia, 2010. https://ueaeprints.uea.ac.uk/19105/.

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36

Curtis, Mark Peter. "Aspects of low Reynolds number microswimming using singularity methods." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:13dcb39b-f5b7-4d46-92d4-21a9afbecd08.

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Three different models, relating to the study of microswimmers immersed in a low Reynolds number ﬂuid, are presented. The underlying, mathematical concepts employed in each are developed using singularity methods of Stokes ﬂow. The ﬁrst topic concerns the motility of an artiﬁcial, three-sphere microswimmer with prescribed, non-reciprocal, internal forces. The swimmer progresses through a low Reynolds number, nonlinear, viscoelastic medium. The model developed illustrates that the presence of the viscoelastic rheology, when compared to a Newtonian environment, increases both the net displacemen

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37

Ma, Zheng. "Impeller Power Draw Across the Full Reynolds Number Spectrum." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1406766474.

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38

Keating, Brian Robert. "Methods for stabilizing high Reynolds number Lattice Boltzmann simulations." W&M ScholarWorks, 2008. https://scholarworks.wm.edu/etd/1539623525.

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The Lattice Boltzmann Method (LBM) is a simple and highly efficient method for computing nearly incompressible fluid flow. However, it is well known to suffer from numerical instabilities for low values of the transport coefficients. This dissertation examines a number of methods for increasing the stability of the LBM over a wide range of parameters. First, we consider a simple transformation that renders the standard LB equation implicit. It is found that the stability is largely unchanged. Next, we consider a stabilization method based on introducing a Lyapunov function which is essentially

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39

Heckel, Scott P. "Reynolds stress measurements in a turbine tip leakage vortex." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10102009-020346/.

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40

Ames, Danielle 1974. "Shear flow visualization at high Reynolds Numbers." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50478.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1998.<br>Includes bibliographical references (leaves 92-94).<br>The mechanisms responsible for various disturbances in the wakes of ships have been investigated for some time. Efforts to define and characterize the contributing factors and resulting turbulent wake manifestations conclude that ship length, speed and geometry play integral and interdependent roles. Previous experimentation in the Ocean Engineering Towing Tank at MIT on small scale model ships supplied data for Reynold's Numbers up to ~ 0(106). The

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41

Oshida, Takeshi. "Surface equation of falling film flows with moderate Reynolds number and large but finite Weber number." 京都大学 (Kyoto University), 2000. http://hdl.handle.net/2433/181170.

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42

Ong, Lih-Yenn. "Experimental and numerical studies of S-shaped diffusing ducts." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8818.

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Chen, Suzhen Aerospace &amp Mechanical Engineering Australian Defence Force Academy UNSW. "An improved low-Reynolds-number k-E [ symbol -dissipation rate]." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace and Mechanical Engineering, 2000. http://handle.unsw.edu.au/1959.4/38651.

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[Formulae and special characters can only be approximated here. Please see the pdf version of the Abstract for an accurate reproduction.] Since the damping functions employed by most of the low-Reynolds-number models are related to the non-dimensional distance y+[ special character ??? near-wall non-dimensional distance in y direction], which is based on local wall shear stress, these models become invalid for separated flows, because the wall shear stress is zero at the reattachment point. In addition, the pressure-velocity correlation term is neglected in most of these models, although this

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44

Tang, Tongdar Danny. "Periodic flow in a bifurcating tube at moderate reynolds number." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/17066.

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Van, Hirtum Annemie. "Moderate Reynolds number ﬂow. Application to the human upper airways". Habilitation à diriger des recherches, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00747213.

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The study of ﬂuid ﬂow is an amasingly ordinary as well as fascinating subject. During the past few years I had the opportunity to work as a researcher in the ﬁeld of ﬂuid ﬂow modelling applied to airﬂow through the human upper airways and related phenomena such as speech production, . . . The current document is a brief report on the research to which I participated aiming a small contribution to this rich and stimulating research area.

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Pantelidis, Konstantinos. "Reynolds number effects on the aerodynamics of compact axial compressors." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/284940.

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An axial compressor for a domestic appliance can be designed to be smaller than an equivalent centrifugal compressor. However, the performance of such a compact axial compression system is limited by increased viscous losses and reduced flow turning at low Reynolds numbers ($Re$). In domestic appliance compressors, $Re$ is typically in the range $10^4$ - $10^5$. Although the aerodynamics of isolated aerofoils operating at these $Re$ have been studied extensively, the flow fields within low $Re$ axial compressors have not been investigated in detail. This dissertation aims to develop an improve

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47

Calderon, Dario. "Plunging low aspect ratio wings in low Reynolds number flows." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616645.

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A growing desire exists to develop Micro Air Vehicles (MA Vs) that fall within a 15cm span. Their small scale and low operating flight speeds encourage a low Reynolds Number (Re) regime, in the order of Re - 104 - 105 . Wings under these conditions are highly susceptible to separated flows, posing a significant challenge for the MA V. Natural flyers are able to confront these issues through flapping flight, which has inspired an entire research field on the aerodynamics of oscillating wings. While the number of parameters that govern the problem is exhaustive, studies are required to explain t

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48

Mehra, Amitav. "Computational investigation and design of low Reynolds number micro-turbomachinery." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10516.

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Wolgemuth, Charles William. "Theory and experiment on thin life at low Reynolds number." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289171.

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Many interesting problems in cellular biophysics involve the dynamics of filamentary elastic objects with bend and twist degrees of freedom, moving in a viscous environment. Motivated by the mysterious macrofiber formation in B. subtilis and the rotational dynamics of bacterial flagella, we have sought to establish a general theoretical structure to deal with elastic filament dynamics, analyze these equations for model systems, and to determine the important physical parameters that set the dynamical scales for these systems. We first studied the novel problem of a rotationally forced elastic

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50

Saha, Nilanjan. "Gap Size Effect on Low Reynolds Number Wind Tunnel Experiments." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35938.

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A system was designed to measure the effect of gap size on semi-span low Reynolds number wind tunnel experiments. The lift forces on NACA 1412, NACA 2412 and NACA 4412 half wings were measured using a strain gauge balance at chord Reynolds numbers of 100,000 and 200,000 and three different gap sizes including sealed gap. Pressure distributions on both airfoil top and bottom surfaces in the chord-wise direction near the gap were recorded for these airfoils. Also recorded was the span wise pressure distribution on both the airfoil surfaces at the quarter chord section. The results revealed that

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