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Thèses sur le sujet « Fluid viscosity »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 26 juillet 2025

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1

Caudwell, Derek Roger. "Viscosity of dense fluid mixtures." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412706.

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2

Almotari, Masaed Moti M. "Viscosity and Density of Reference Fluid." Thesis, University of Canterbury. Physics and Astronomy, 2006. http://hdl.handle.net/10092/2065.

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The viscosity and density of bis(8-methylnonyl) benzene-1,2- dicarboxylate {diisodecyl phthalate (DIDP)}, with a nominal viscosity at T = 298 K and p = 0.1 MPa of 87 mPa•s, have been measured at temperatures from (298.15 to 423.15) K and pressures from (0.1 to 70) MPa. A vibrating wire viscometer, with a wire diameter of about 0.15 mm, was utilised for the viscosity measurements and the results have an expanded uncertainty, (k = 2), including the error arising from the pressure measurement, of between ±(2 and 2.5) % The density was determined with two vibrating tube densimeters one for operati

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3

Jiao, Chaoying. "Miscible displacements in porous media with variation of fluid density and viscosity /." [Karlsruhe] : Die Universität, 2001. http://www.ubka.uni-karlsruhe.de/vvv/2002/bio-geo/1/.

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Thesis (Doctoral)--Universität Karlsruhe, 2001.<br>Abstract in German. Hochschulschrift = Thèse/Mémoire. Includes bibliographical references (p. 109-133). Also available via the World Wide Web. http://www.ubka.uni-karlsruhe.de/indexer-vvv/2002/bio-geo/1

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4

Shuaib, Ali. "Ratiometric techniques to determine fluid viscosity using molecular rotors." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4921.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on May 12, 2009) Includes bibliographical references.

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5

Thomas, Jason Christopher. "Prediction of Fluid Viscosity Through Transient Molecular Dynamic Simulations." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3312.pdf.

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6

麥民光 and Man-kwong Mak. "The relativistic static charged fluid sphere and viscous fluid cosmological model." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237526.

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7

Mak, Man-kwong. "The relativistic static charged fluid sphere and viscous fluid cosmological model /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19324352.

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8

Eichler, Brett I. "Evolution of a finite disturbance in a viscous fluid." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/12230.

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9

Wang, Wei-Chih. "A study of fluid viscosity and flow measurement using fiber-optic transducers /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5908.

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10

Abdulahi, Abolore. "Investigating the effect of liquid viscosity on two-phase gas-liquid flows." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/30935/.

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Simultaneous flow of gas-liquid in pipes presents considerable challenges and difficulties due to the complexity of the two-flow mixture. Oil-gas industries need to handle highly viscous liquids, hence studying the effect of changing the fluid viscosity becomes imperative as this is typically encountered in deeper offshore exploration. This work looks at the effect of liquid viscosity on gas-liquid flows. The work was carried out using two different pipes of 67mm and 127mm internal diameter. For the experiments carried out on the 67mm diameter pipe, air and three different liquids were used wi

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11

Wu, Liushun. "Study on some phenomena of slag in steelmaking process." Doctoral thesis, KTH, Mikro-modellering, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32740.

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The present work is to study slag phenomena in steelmaking process. In order to attain thegoal, a number of high temperature experiments and simulation experiments were carried out. Four master slags were used to study the effect of CaF2 on slag viscosity. Experimentalresults indicated the effect of CaF2 on slag viscosity depended strongly on the composition ofmaster slag. For high basicity slags, CaF2 mainly suppressed the precipitation of solid phasesat lower temperatures, leading to a lower viscosity compared to CaF2-free slags. For slagswith higher SiO2 contents, CaF2 both lowered the visc

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12

Moresi, Louis-Noel. "The relation of surface observables to convection in a fluid with variable viscosity." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306211.

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13

Lukner, Ralf Bernhard. "Piston-driven flow of highly concentrated suspensions /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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14

Randall, Richard John. "Fluid-structure interaction of submerged shells." Thesis, Brunel University, 1990. http://bura.brunel.ac.uk/handle/2438/5446.

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A general three-dimensional hydroelasticity theory for the evaluation of responses has been adapted to formulate hydrodynamic coefficients for submerged shell-type structures. The derivation of the theory has been presented and is placed in context with other methods of analysis. The ability of this form of analysis to offer an insight into the physical behaviour of practical systems is demonstrated. The influence of external boundaries and fluid viscosity was considered separately using a flexible cylinder as the model. When the surrounding fluid is water, viscosity was assessed to be signifi

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15

Srinivasan, Shriram. "Study of shear-driven unsteady flows of a fluid with a pressure dependent viscosity." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3201.

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16

Bennour, Ziad. "Effect of Hydraulic Fracturing Fluid Viscosity on Stimulated Reservoir Volume for Shale Gas Recovery." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225563.

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17

Jiao, Chaoying [Verfasser]. "Miscible displacements in porous media with variation of fluid density and viscosity / Chaoying Jiao." Karlsruhe : KIT-Bibliothek, 2001. http://d-nb.info/1013828941/34.

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18

Dickmann, James Scott. "Volumetric Properties and Viscosity of Fluid Mixtures at High Pressures: Lubricants and Ionic Liquids." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/90219.

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The present thesis explores the volumetric and transport properties of complex fluid mixtures under pressure in order to develop a better, more holistic understanding of the relationship between the volumetric properties, derived thermodynamic properties, and viscosity. To accomplish this broad objective, two different categories of fluid mixtures were examined using a combination of experimental data and models. These included base oils and their mixtures with polymeric additives, used in lubricants and ionic liquids, with cosolvent addition, for use in biomass and polymer processing. Expe

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19

Tekasakul, Perapong. "Rotatory oscillation of arbitrary axisymmetric bodies in a viscous fluid : numerical solutions /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9823331.

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20

Loney, Drew Allan. "Coupled electrical and acoustic modeling of viscous fluid ejectors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54247.

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The focus of this dissertation is the development of a fundamental understanding of the acoustics and piezoelectric transducer governing the operation of piezoelectric inkjets and horn-based ultrasonic atomizers when utilizing high viscosity working fluids. This work creates coupled, electro-mechanical analytical models of the acoustic behavior of these devices by extending models from the literature which make minimal simplifications in the handling terms that account for viscous losses. Models are created for each component of the considered fluid ejectors: piezoelectric transducers, acous

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21

Badiane, Doudou. "Simulation numérique et étude expérimentale d'un viscosimètre à principe vibrant." Thesis, Orléans, 2012. http://www.theses.fr/2012ORLE2057/document.

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La connaissance de la viscosité est un défi majeur dans les technologies de pointe (biomédical, pétrochimie, imprimerie, cosmétique, agroalimentaire, etc). Cette étude présente un capteur de viscosité qui exploite la vibration transversale forcée d’une poutre mince. L’amortissement induit par le fluide permet d’évaluer sa viscosité et sa masse volumique par la seule connaissance des caractéristiques à la résonance de la poutre (amplitude et fréquence). Cette mesure est réalisée par un circuit électromagnétique. Dans ce travail, la simulation numérique et l’étude expérimentale du viscosimètre s

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22

Venkataraman, Siddharth. "Analytic, Simulation and Experimental Analysis of Fluid-Pipe Systems." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-249996.

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Inviscid ﬂuid inside thin pipe system is ﬁrst analytically solved for eigenfrequencies and eigenmodes using Modal Interaction Model method with ﬂuid-structure interaction condition at boundary. Shear-diaphragm boundary condition is used for comparing and validating Analytic results with Simulation using COMSOL Multiphysics. Effect of viscosity is also compared using Newtonian ﬂuid model. Experiment is performed using simple pipe geometry and ﬂuid to measure transfer accelerance which is post-processed to extract cirumferential modes up to order 4; this is used to compare and validate Experieme

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23

Suga, Kazuhiko. "Development and application of a non-linear eddy viscosity model sensitized to stress and strain variants." Thesis, University of Manchester, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296470.

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24

Konstantinov, Dancho. "Parametric study of the influence of operating conditions, atomiser geometry and fluid viscosity on effervescent atomisation." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/36247/.

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This thesis investigates effervescent atomisation, a liquid fuel atomisation technique with wide industrial applications, and one which offers several important advantages over conventional atomiser types. An “inside-out” type atomiser rated at 2MW equivalent power (based on mass flow rate) was designed and tested using a state-of-the-art 2-D Phase Doppler Anemometry (PDA) system which allowed for simultaneous real-time droplet size and velocity data to be obtained. High quality data was achieved, with data rates up to 10 kHz and validation rates over 90% in 2-D PDA coincident mode in the high

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25

Conrad, Bryan Preston. "The effects of glucosamine and chondroitin on the viscosity of synovial fluid in patients with osteoarthritis." [Gainesville, Fla.] : University of Florida, 2001. http://etd.fcla.edu/etd/uf/2001/anp4318/B.CONRAD-THESIS8-03.pdf.

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Thesis (M.E.)--University of Florida, 2001.<br>Title from first page of PDF file. Document formatted into pages; contains xi, 69 p.; also contains graphics. Vita. Includes bibliographical references (p. 64-68).

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26

Grampeix, Guillaume. "Vibration des bétons." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1179/document.

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Dans le domaine de la construction, le béton constitue le matériau le plus consommé. Afin de favoriser le remplissage des coffrages in situ, les bétons sont liquéfiés ponctuellement suite à l'insertion successive d'une aiguille vibrante. Malgré l'arrivée sur le marché des bétons très fluides à auto-plaçant, les bétons ordinaires représentent plus de 90% des formulations employés sur les chantiers. Cependant, les recommandations traditionnelles actuelles se basent sur des études établies au cours de la première moitié du siècle dernier. Ainsi, nous choisissons de les revisiter afin d'incorporer

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27

Ritchie, D. A. "Thermal contact to and the effective viscosity of liquid mixtures of sup(3)He and sup(4)He at very low temperatures." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372733.

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28

Avadhany, Shakeel N. "Analysis of hydraulic power transduction in regenerative rotary shock absorbers as function of working fluid kinematic viscosity." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/58375.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 29).<br>This investigation seeks to investigate the relationship of kinematic fluid viscosity to the effective power transduction seen by a hydraulic motor. Applications of this research specifically relate to energy recovery from a vehicle suspension system through the shock absorbers. A regenerative, hydraulic-based, rotary shock absorber was designed and fabricated for the purposes of this investigation. T

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29

Khalaf, Wadad Ghazi Dunia. "Effect of fluid viscosity and electrical conductivity on the ohmic heating rate of a solid-liquid mixture." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298902428.

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30

Alagbe, Solomon Oluyemi. "Experimental and numerical investigation of high viscosity oil-based multiphase flows." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/10495.

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Multiphase flows are of great interest to a large variety of industries because flows of two or more immiscible liquids are encountered in a diverse range of processes and equipment. However, the advent of high viscosity oil requires more investigations to enhance good design of transportation system and forestall its inherent production difficulties. Experimental and numerical studies were conducted on water-sand, oil-water and oilwater- sand respectively in 1-in ID 5m long horizontal pipe. The densities of CYL680 and CYL1000 oils employed are 917 and 916.2kg/m3 while their viscosities are 1.

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31

Clark, Paul D. "An InVitro Leakage and Viscosity Analysis of Root End Filling Materials." VCU Scholars Compass, 2007. http://scholarscompass.vcu.edu/etd/1108.

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The purpose of this study was to determine if the viscosity of MTA Angelus Fluid is lower than that of Pro Root MTA and MTA Angelus; and to compare the viscosity, leakage and particle size of these materials to determine whether a relationship exists between these properties. The viscosity of each material was measured and compared with the Student's t test. MTA Angelus Fluid's viscosity was significantly lower than the other two materials tested. Microleakage of root end fillings was assessed in a passive diffusion model. Leakage groups were compared with a one-way ANOVA (p < 0.05). No signi

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32

Klyukin, Yury Igorevich. "Modelling and analytical studies of magmatic-hydrothermal processes." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/84442.

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Hydrothermal processes play a major role in transporting mass and energy in Earth’s crust. These processes rely on hydrothermal fluid, which is dissolving, transporting and precipitating minerals and distribute heat. The composition of the hydrothermal fluid is specific for various geological settings, but in most cases it can be approximated by H₂O-NaCl-CO₂ fluid composition. The flow of hydrothermal fluid is controlled by differences in temperature, pressure and/or density of the fluid and hydraulic conductivity of the rock. In my work, I was focused on modeling of the hydrothermal fluid pro

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33

Tromp, Stéphane. "Lubrication with a refrigerant : An industrial challenge investigated through multiscale modeling based on fluid/surface chemistry." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI060/document.

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Dans les grands systèmes de réfrigération, l’utilisation de réfrigérants comme lubrifiants, à la place des huiles, simplifie la conception du système, l’allège et réduit son impact environnemental. La très faible viscosité du réfrigérant conduit à une épaisseur de film séparant les deux surfaces comparable à leur rugosité. Néanmoins, des travaux expérimentaux avec le réfrigérant R1233zd suggèrent que la lubrification est possible dans ces conditions grâce à la formation d’une couche adsorbée sur la surface d’oxyde de fer. Les analyses expérimentales in situ dans le contact sont très difficiles

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34

Kalombo, Jean-Jacques Ntambwe. "Centrifugal pump derating non-Newtonian slurries: analysis of the viscosity to be used in the hydraulic institute method." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/905.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2013<br>Centrifugal pumps are the most commonly used pumps in slurry transport systems. The design of pumping systems dealing with liquids more viscous than water requires a reliable method of pump performance prediction for the pump selection. For Newtonian fluids, the Hydraulic Institute method is well established, but there is no generally accepted method for non-Newtonian fluids. Many authors have fallen back on using the Hydraulic Institute method for non-Newtonian fluids. This requires a constant viscosity wh

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Carrig, Pauline Elize. "The effect of blood chemistry on the rheological properties of the fluid." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94451.

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A four variable constitutive equation was developed utilizing the method first presented by Schneck and Walburn. Spearman rank correlation coefficients were calculated on whole blood samples within a narrow range of hematocrit to investigate further the effect of the various plasma constituents on whole blood viscosity. Viscosity measurements were made on one hundred anticoagulated blood samples of known hematocrit and chemical composition. The constitutive equation was developed using a power law functional form similar to that employed by Schneck and Walburn. This equation contains two para

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36

Reinheimer, Letícia. "Medição da viscosidade de óleos newtonianos por reômetro óptico em diferentes temperaturas." reponame:Repositório Institucional da UCS, 2014. https://repositorio.ucs.br/handle/11338/940.

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Efetuou-se, de forma inédita, a avaliação da viscosidade de dois óleos Newtonianos em velocidades distintas de escoamento (1000rpm e 1500rpm) e em função da temperatura (24ºC a 50ºC), através de um método de reologia a laser, que consiste num interferômetro óptico acoplado a um spinner. Para a obtenção dos dados experimentais desenvolveu-se um sistema de aquecimento, o qual foi acoplado ao spinner, garantindo assim a estabilidade térmica durante o processo. Os dados experimentais obtidos através do método de reologia a laser corroboraram com o modelo de Emslie, Bonner e Peck (EBP), considerand

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37

Garcia, Julio Enrique. "Fluid Dynamics of Carbon Dioxide Disposal into Saline Aquifers." Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/821335-QqO4VQ/native/.

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Thesis (Ph.D.); Submitted to the University of California, Berkeley, CA (US); 18 Dec 2003.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "LBNL--54280" Garcia, Julio Enrique. USDOE Director. Office of Science. Basic Energy Sciences (US) 12/18/2003. Report is also available in paper and microfiche from NTIS.

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Basarić, Danica [Verfasser], Eduard [Akademischer Betreuer] Feireisl, Etienne [Gutachter] Emmrich, Eduard [Gutachter] Feireisl, and Martina [Gutachter] Hofmanová. "Semiflow selections and vanishing viscosity limits in fluid dynamics / Danica Basarić ; Gutachter: Etienne Emmrich, Eduard Feireisl, Martina Hofmanová ; Betreuer: Eduard Feireisl." Berlin : Technische Universität Berlin, 2021. http://d-nb.info/1238141978/34.

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39

Boyer, Nathan Robert. "The Effects of Viscosity and Three-Dimensionality on Shockwave-Induced Panel Flutter." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu156616766854713.

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40

Салій, О. О., та К. В. Небилиця. "Обгрунтування складу ін'єкційного препарату гіалуронату натрію у поєднанні з хондроїтину сульфатом". Thesis, Тернопільський національний медичний університет імені І. Я. Горбачевського, 2020. https://er.knutd.edu.ua/handle/123456789/16513.

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Новим напрямом розвитку внутрішньо-суглобової терапії артрозу є використання природніх полімерів завдяки їх біологічної сумісності з тканинами організму, як носіїв доставки лікарських засобів у суглобовий хрящ та синовіальну рідину. Для розробки складу ін’єкційного розчину для внутрішньо-суглобового введення обрано гіалуронат натрію з молекулярною масою 2000 кДа. Для стабілізації гіалуронату натрію застосовано хондроїтину сульфат, який наряду з протизапальною та регенеруючою діями має технологічну здатність утворювати поперечні зшивки лінійних молекул гіалуронату і формувати стійку макромолеку

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41

Hawkins, Jared B. "Effect of Hydraulic Conductivity Heterogeneity on the Movement of Dense and Viscous Fluids in Porous Media." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1321978016.

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42

Gurbuz, Berkay. "Experimental Characterization Of Some Water Soluble Polymers Used In Drilling And Completion Fluids." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614146/index.pdf.

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Properly preparing the drilling fluid is an essential part of any successful drilling operation, especially in complex operations like deviated and horizontal drilling. Understanding the flow behavior of the polymers used in the drilling fluids under different conditions takes a key part in this preparation. In this study, shear rheology of some traditionally used water soluble polymers in drilling and completion fluids<br>namely PAC (polyanionic cellulose) and xanthan gum, were investigated experimentally. Instead of an oilfield standard Fann Model 35 Viscometer, an Ofite Model 900 Viscomete

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43

Audard, François. "Modélisation eulérienne de la vidange d'un silo et de l'expansion du panache." Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0134/document.

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De nombreux procédés industriels nécessitent la manipulation de matériaux sous forme pulvérulente. L’émission de poussières générée par leur manipulation peut s’avérer dangereuse pour la santé des travailleurs ou bien causer un risque d’explosion. Afin de mieux comprendre les mécanismes de dispersion des poussières, le cas de la décharge d’un silo est étudié par simulation numérique avec une approche Euler-Euler. Deux configurations ont été étudiées au cours de cette thèse. La première, sans silo, a permis d’étudier l’influence de perturbations de vitesses imposées à l’entrée de la chambre de

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44

Li, Siran. "Analysis of several non-linear PDEs in fluid mechanics and differential geometry." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:20866cbb-e5ab-4a6b-b9dc-88a247d15572.

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In the thesis we investigate two problems on Partial Differential Equations (PDEs) in differential geometry and fluid mechanics. First, we prove the weak L<sup> p</sup> continuity of the Gauss-Codazzi-Ricci (GCR) equations, which serve as a compatibility condition for the isometric immersions of Riemannian and semi-Riemannian manifolds. Our arguments, based on the generalised compensated compactness theorems established via functional and micro-local analytic methods, are intrinsic and global. Second, we prove the vanishing viscosity limit of an incompressible fluid in three-dimensional smooth

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45

Bouchehit, Bachir. "Etude dynamique d’un palier compliant lubrifié à l’aide de fluide réfrigérant." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI013/document.

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Depuis plusieurs années à nos jours, les paliers à gaz sont utilisés avec succès sur une large gamme de turbo-machines. Certains de ces systèmes sont utilisés dans des environnements de contrôle de l’environnement par gaz réfrigérant. Dans ce travail, nous présentons un modèle théorique et numérique qui tient compte de la transition du lubrifiant vapeur / liquide, la transition de l’écoulement laminaire / turbulent et les variations 3D de la viscosité et de la température dans le fluide et les solides pour les deux situations statiques et dynamiques. Ce modèle comporte : la résolution de l'équ

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Rouis, Fahima. "Effet des caractéristiques physico-chimiques des ajouts minéraux sur les propriétés rhéologiques des mortiers de bétons fluides équivalents." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/10545.

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La vitesse à laquelle le monde actuel fonctionne a des répercutions directes sur tout ce qui nous entoure et, en premier plan, sur le marché de la construction dont les cirières sont de plus en plus exigeants tels que les courts délais de construction, la complexité des formes, etc. L’utilisation des bétons fluides dont les propriétés rhéologiques sont bien maîtrisées est une clé pour satisfaire à ces critères, d’autant plus qu’on se trouve au seuil d’une nouvelle ère dans le monde de la construction incluant l’impression 3D des bétons. Cependant, une sélection adéquate des ajouts minéraux (AM

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Schrecker, Matthew. "Hyperbolic problems in fluids and relativity." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:2dec2eb9-4253-4625-a071-0c19d0c1f76d.

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In this thesis, we present a collection of newly obtained results concerning the existence of vanishing viscosity solutions to the one-dimensional compressible Euler equations of gas dynamics, with and without geometric structure. We demonstrate the existence of such vanishing viscosity solutions, which we show to be entropy solutions, to the transonic nozzle problem and spherically symmetric Euler equations in Chapter 4, in both cases under the simple and natural assumption of relative finite-energy. In Chapter 5, we show that the viscous solutions of the one-dimensional compressible Navier-S

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Dupont, Pascal. "Ondes internes engendrées par une source oscillante en mouvement." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10089.

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Dans un fluide stratifie, le mouvement d'un corps est responsable de deux sources d'ondes internes: l'ecoulement potentiel qui engendre les ondes de relief et le sillage. L'objet de ce memoire est la comprehension des ondes emises par le sillage d'un corps tridimensionnel, qui masquent les ondes de relief a hauts nombres de froude et de reynolds. L'effet collectif des effondrements successifs des structures coherentes du sillage est modelise par une source oscillant a la frequence d'instabilite du sillage et en translation a la meme vitesse que le corps. Les ondes engendrees par une telle sour

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Loebker, David W. "Effervescent spraying of high viscosity fluids." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/7041.

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Maes, RENAUD POL. "Etude expérimentale de la digitation visqueuse de fluides miscibles en cellule de Hele-Shaw." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/216585.

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La digitation visqueuse est une instabilité hydrodynamique apparaissant lorsque, dans un milieu poreux, un fluide moins visqueux déplace un fluide plus visqueux. L'objectif de notre thèse est l'étude expérimentale des propriétés des motifs de digitation lorsque l'échantillon de fluide visqueux est de taille finie et lorsqu'une réaction chimique modifie la viscosité dans un milieu poreux modèle, en l'occurrence une cellule de Hele-Shaw. En particulier, notre étude a permis de quantifier la contribution de dispersion et de la digitation visqueuse, l'étalement dans l'espace d'échantillons de tail

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