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Dissertations / Theses on the topic 'Process fluids'

Author: Grafiati

Published: 28 June 2021

Last updated: 4 February 2022

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1

Yerlett, T. K. "Enthalpies of fluids and fluid mixtures." Thesis, University of Bristol, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355339.

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2

Schwarz, Cara Elsbeth. "The phase equilibrium of alkanes and supercritical fluids." Thesis, Stellenbosch : University of Stellenbosch, 2001. http://hdl.handle.net/10019.1/2532.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2001.<br>Current methods for wax fractionation result in products with large polydispersity, and due to the high temperatures required, thermal degradation of the wax is often incurred. The need for an alternative process thus exists. The purpose of this project is to investigate the technical viability of supercritical fluid processing as an alternative wax fractionation technology. The main aims of this project are to select a suitable supercritical solvent, to conduct binary phase equilibrium experiments, to determine

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3

Tao, Zhengsu. "Characteristics of the transparent fluid assisted in-process measurement method /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?MECH%202003%20TAO.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.<br>Includes bibliographical references (leaves 106-114). Also available in electronic version. Access restricted to campus users.

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4

Schwarz, Cara Elsbeth. "The processing of wax and wax additives with supercritical fluids." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1195.

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5

West, Kevin Neal. "CO₂ -expanded liquids as environmentally benign process solvents." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/9367.

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6

Li, Bo. "Detection of particles and estimation of size distribution in process fluids /." Online version of thesis, 1992. http://hdl.handle.net/1850/11258.

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7

Al, Sofyani Sharaf. "Analytical Modeling and Experimental Analysis of Metalworking Fluids in theMilling Process." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1494853268000644.

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8

Ohmori, Tsutomu. "The Study on Diffusion Process of Species on Reaction in Supercritical Fluids." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/149090.

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9

Rutnakornpituk, Metha. "Synthesis of Silicone Magnetic Fluids for Use in Eye Surgery." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/27723.

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Stable suspensions of superparamagnetic cobalt nanoparticles have been prepared in poly(dimethysiloxane) (PDMS) carrier fluids in the presence of poly[dimethylsiloxane-b-(3-cyanopropyl)methylsiloxane-b-dimethylsiloxane] (PDMS-PCPMS-PDMS) triblock copolymers as steric stabilizers. A series of the polysiloxane triblock copolymers with systematically varied molecular weights were prepared via anionic polymerization using LiOH as an initiator. These copolymers formed micelles in toluene or poly(dimethylsiloxane) (PDMS) carrier fluids and served as â nanoreactorsâ for thermal decomposition of

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10

Tessaro, Elias Paulo. "Avaliação de processos oxidativos para o tratamento ambientalmente adequado de fluidos de corte." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-20062008-165020/.

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Durante o processo metalúrgico de usinagem de uma peça ocorre a geração de calor proveniente do atrito ferramenta/peça e cavaco/ferramenta. Para que ocorra uma menor geração de calor possibilitando o manuseio, bem como a minimização na deformação da peça, utilizam-se fluidos, que são soluções lubrificantes à base de óleos, água ou polímeros, podendo ser sintéticos ou não, diminuindo, assim, o coeficiente de atrito reduzindo-se a quantidade de calor gerado no processo. Há uma grande variedade de fluidos de corte disponíveis no mercado que são constituídos por diversos compostos como: aminas, co

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11

Ghaderi, Raouf. "A supercritical fluids extraction process for the production of drug loaded biodegradable microparticles." Doctoral thesis, Uppsala University, Department of Pharmacy, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1072.

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<p>The purpose of this thesis was to develop methods suitable for the incorporation of drug substancessuch as proteins into microparticles intended for controlled release. In particular a novel techniquefor the preparation of microparticles using supercritical fluids was investigated.</p><p>Supercritical fluids offer a considerable promise as extraction media for the formation ofmicroparticles of drugs and pharmaceutical excipients. There are two main reasons for using this technique. Firstly, the selective solvating power of supercritical fluids makes it possible to separatea particular compo

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12

Pena-Diaz, Hernan R. "Experimental validation of an atomization model for fluids used in the grinding process." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/18999.

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13

Buers, Katy Louise Mary. "A treatment process for the degradation of metal-working fluids using mixed microbial cultures." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242930.

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14

Kang, Yi Chun. "How identity fluids in college student entrepreneurs :the sense-making process of identity formation." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3952586.

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15

Jhothiraman, Jivaan Kishore. "Comprehensive Methods for Contamination Control in UHP Fluids." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/605112.

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The demand for high performance electronic devices is ever increasing in today's world with advent of digital technology in every field. In order to support this fast paced growth and incursion of digital technology in society, smarter, smaller integrated circuits are required at a lower cost. This primary requirement drives semiconductor industries towards the integration of larger number of smaller transistors on a given circuit area. The past decades have seen a rapid evolution of material processing and fabrication techniques, as focus shifts from submicron to sub-nanometer length scales i

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16

Elbashir, Nimir O. M. Roberts Christopher B. "Utilization of supercritical fluids in the Fischer-Tropsch synthesis over cobalt-based catalytic systems." Auburn, Ala., 2004. http://repo.lib.auburn.edu/EtdRoot/2004/FALL/Chemical_Engineering/Dissertation/ELBASHIR_NIMIR_25.pdf.

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17

Du, Rand Marlie. "Practical equation of state for non-spherical and asymmetric systems." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16043.

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Thesis (PhD)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: In this study an equation of state has been developed for the specific purpose of representing systems of simple non-polar spherical and chain-like components and their mixtures for practical applications. To be applied in engineering calculations, the model has to be accurate, be able to represent mixtures with large size asymmetry without the use large binary interaction parameters, and be mathematically simple enough to ensure rapid computations. The model is developed through a sequential evaluation of the statistica

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18

Nguyen, Khanh Phuong. "Rheological characterization of high density polyethylene with processing aids in capillary flow and its implications in a non-isothermal annular flow process." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/10191.

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19

Nolen, Shane Anthony. "Environmentally benign chemical processing using supercritical carbon dioxide and near-critical water." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/11011.

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20

Ricart, Ferrer Josep. "Optimització d'extracció de diluents no reactius en tintes / adhesius aplicats sobre substrats per a envasos flexibles." Doctoral thesis, Universitat de Girona, 2019. http://hdl.handle.net/10803/672370.

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The reason for the writing of this doctoral thesis arises from the commitment adopted by COMEXI in order to put its products in the market making his products more sustainable and environmentally friendly. Is in this process of continuous improvement that the company has set the goal to reduce the energy consumption of the flexographic presses, rotogravure presses as well as laminators. All these machines have in common that all of them have a drying system mainly based on forced convection drying, whose consumption can reach values near to 60% of total machine’s consumption. The drying pr

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21

Rasschaert, Fanny. "Rhéologie et mécanique des fluides du conditionnement de produits semi-solides." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI054.

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Le conditionnement, opération unitaire clé du processus industriel de fabrication des produits fromagers, consiste à remplir par un jet de façon homogène des emballages de formes variées par des produits à propriétés rhéologiques complexes tout en assurant des cadences optimisées. L’objectif de cette étude est de prédire le remplissage d’un emballage, à partir de la connaissance de la rhéologie des produits et des paramètres opératoires pour le dimensionnement de nouveaux procédés de conditionnement ou l’optimisation de procédés existants.Nécessaire à la poursuite de l’étude, le comportement r

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22

Lima, Nicolao Cerqueira 1985. "Simulação de escoamentos eletrohidrodinâmicos de fluidos newtonianos e viscoelásticos." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263465.

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Orientador: Marcos Akira d'Ávila<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica<br>Made available in DSpace on 2018-08-22T01:11:51Z (GMT). No. of bitstreams: 1 Lima_NicolaoCerqueira_M.pdf: 2608433 bytes, checksum: 1f09fc99d86a78b7861be6972463c29c (MD5) Previous issue date: 2013<br>Resumo: A eletrohidrodinâmica trata basicamente dos efeitos de um campo elétrico em meios contínuos. Um fluido sob o efeito de um campo elétrico tende a se deformar devido a uma força elétrica que age sobre ele. Essa força elétrica é consequência de alguns fatores qu

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23

Moussa, Nadine. "Multi scale modelling and numerical simulation of metal foam manufacturing process via casting." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC021/document.

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L'objectif est d'élaborer un nouveau procédé de fabrication de mousses métalliques par voie de fonderie en modélisant l'infiltration et la solidification d'un métal liquide dans un milieu poreux. La modélisation est faite en deux étapes.Tout d'abord, à l'échelle locale un brin de la mousse métallique est considéré comme un tube capillaire et l'infiltration et solidification d'un métal liquide dans un moule cylindrique est étudiée. Deuxièmement,le modèle macroscopique de la solidification diffusive d'un métal liquide dans un milieu poreux est obtenu par prise de moyenne volumique. Le modèle loc

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24

Lampe, Matthias Verfasser], André [Akademischer Betreuer] [Bardow, and Joachim [Akademischer Betreuer] Gross. "Integrated design of process and working fluids for organic rankine cycles / Matthias Lampe ; André Bardow, Joachim Gross." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1126971677/34.

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25

Norrell, Jeffery Lee. "A mixed mode thermal/fluids model for improvements in SLS part quality, machine design, and process design /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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26

Lampe, Matthias [Verfasser], André [Akademischer Betreuer] Bardow, and Joachim [Akademischer Betreuer] Gross. "Integrated design of process and working fluids for organic rankine cycles / Matthias Lampe ; André Bardow, Joachim Gross." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2016-027963.

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27

Yang, Ke. "Anaerobic treatment of a metalworking fluid and overcoming the toxic effects on the biodegradation process." Thesis, University of Oxford, 2016. http://ora.ox.ac.uk/objects/uuid:fae32f24-e9f6-48df-9135-8ccca639dd86.

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Metalworking fluids (MWFs) are petroleum emulsions employed for metal machining processes as coolants and lubricants. To date, they have been irreplaceable in modern heavy and manufacturing industries, with annual usage exceeding two billion litres worldwide. However, the large amount of MWFs, the highly concentrated complex recalcitrant and toxic petroleum components contained in them continue to cause significant concern in terms of sustainable routes of end-of-life treatment and disposal. Compared with other treatment methods, the anaerobic treatment method has significant advantages, such

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28

Huang, Yow-lin [Verfasser], and Jadran [Akademischer Betreuer] Vrabec. "Molecular modeling and simulation of real fluids for applications in process engineering / Yow-lin Huang. Betreuer: Jadran Vrabec." Paderborn : Universitätsbibliothek, 2010. http://d-nb.info/1033765546/34.

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29

Gharib, Ali Jalal Ibrahim, and Ali Abdulbasit Abdulaziz. "The Sustainability related opportunities and challenges with various transformer insulation fluids and business case on re-refining." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222015.

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Transformers are electrical devices used in practice to increase or decrease voltages. Transformers are of various sizes and used mainly in power distribution. To provide cooling and insulation, transformer oils are used together with cellulose that acts as a solid insulation. The most common type of transformer oil is mineral oil and is a product derived from the refining of crude oil. Its low cost and good compatibility with cellulose are two factors that have led to its predominant position as the common transformer oil. There are also synthetic ester based transformer oils, and following a

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30

Hwang, Yongyun. "Large-scale streaks in wall-bounded turbulent flows: amplication, instability, self-sustaining process and control." Phd thesis, Ecole Polytechnique X, 2010. http://pastel.archives-ouvertes.fr/pastel-00564901.

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Wall-bounded turbulent flows such as plane Couette flow, channel, pipe flows and boundary layer flows are fundamental problem of interest that we often meet in many scientific and engineering situations. The goal of the present thesis is to investigate the origin of large-scale streaky motions observed in the wall-bounded turbulent flows. Under a hypothesis that the large-scale streaky motions sustain with a process similar to the well-known near-wall self-sustaining cycle, the present thesis have pursued on four separate subjects: (i) non-modal amplification of streaks, (ii) the secondary ins

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31

Casciato, Michael John. "The design, synthesis, and optimization of nanomaterials fabricated in supercritical carbon dioxide." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49059.

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This thesis presents investigations into the design and synthesis of nanomaterials in supercritical carbon dioxide (sc-CO₂) as well as novel experimental design methodologies. First, the process-structure-property relationships are studied for the deposition of materials from organometallic precursors in sc-CO₂. The materials that were investigated in these studies were: (1) the semiconductor material copper zinc tin sulfide (Cu₂ZnSnS₄, or CZTS), which has application in solar energy capture; (2) zinc sulfide nanoparticles deposited onto carbon nanotubes, which have application in optoelectron

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32

Careno, Stephanie. "Etude du mode de mise en contact de phases par jets d'impact appliqué aux procédés de génération de particules en milieu supercritique." Thesis, Aix-Marseille 3, 2011. http://www.theses.fr/2011AIX30004.

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L’objectif de ce travail est d’étudier l’influence de jets d’impact libres utilisés comme mode de mise en contact des phases dans les procédés de recristallisation utilisant un fluide supercritique comme anti-solvant. L’influence des variations de plusieurs paramètres opératoires sur l’hydrodynamique des jets et sur les caractéristiques des poudres de Sulfathiazole a été étudiée. Les paramètres sont la vitesse des jets (de 0,25 m.s-1 à 25,92 m,s-1), le rapport molaire solvant/CO2 (de 2,5 % à 20 %), la température (de 313 K à 343 K), la pression (10 MPa à 20 MPa) et la concentration du soluté d

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33

Reviol, Thomas [Verfasser]. "A design process for propellers for the agitation of high viscous fluids based on the design analysis of wind turbine blades / Thomas Reviol." Düren : Shaker, 2021. http://nbn-resolving.de/urn:nbn:de:101:1-2021100305211998726893.

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34

Vnuková, Zuzana. "Vliv mazacích kapalin na průvodní veličiny tváření závitů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444293.

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The main task of this work was to compare the being used process fluids in mechanical engineering with a focus on polymer and additive fluids. Selected polymer and nanoadditive fluids were compared based on a thread forming test, during which different concentrations of individual fluids were tested. All data from experiments were evaluated, assessed in terms of their properties, and recommended for further practice.

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35

Reviol, Thomas [Verfasser], and Martin [Akademischer Betreuer] Böhle. "A design process for propellers for the agitation of high viscous fluids based on the design analysis of wind turbine blades / Thomas Reviol ; Betreuer: Martin Böhle." Kaiserslautern : Technische Universität Kaiserslautern, 2021. http://d-nb.info/1238595782/34.

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36

Vilà-Rovira, Albert. "Integrating computational fluid dynamics and biological model to assess wastewater reactor design." Doctoral thesis, Universitat de Girona, 2017. http://hdl.handle.net/10803/461774.

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This doctoral thesis has integrated biological models (activated sludge models “ASM”) with simulation tools of computational fluid dynamics “CFD”, and has applied them to the design of two advanced technologies for wastewater treatment: “Microbial Fuel Cells” and the “Anammox” process. Wastewater treatments based on Microbial Fuel Cells use the catalytic bioelectrochemical activity of certain microorganisms to oxidise organic compounds and produce electricity without needing additional chemical compounds. In Anammox process (Anaerobic Ammonium Oxidation) microorganisms also play a main role in

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37

Bahbah, Chahrazade. "Advanced numerical methods for the simulation of the industrial quenching process." Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLM012.

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La trempe est une méthode de traitement thermique où un métal chaud est refroidi rapidement à l’aide d’un medium. Le but est de donner au métal une certaine microstructure afin d’atteindre les performances mécaniques requises. Ce procédé a des impacts directs sur l’évolution propriétés mécaniques, contrôle de la microstructure et libération des contraintes résiduelles. Afin de réaliser un procédé optimal, il est essentiel de contrôler correctement les transformations de phase qui ont lieu dans l’alliage, et ainsi obtenir la microstructure présentant les propriétés thermomécaniques souhaitées.

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38

Palma, Paulo Jorge Nobre. "Paisagem sistema líquido Lisboa." Master's thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/17529.

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A partir de três premissas essenciais para a apreensão e construção da Paisagem, entende-se o Sistema Paisagem como um organismo vivo, aberto e fluido. A introdução da categoria tempo, influenciou o processo de formulação imagética, de apreensão espacial, e também abriu diversas possibilidades de aproximação à Paisagem, enquanto Sistema Liquido, caracterizado pelos seus conteúdos particulares e pela sua permanente transformação. Optando por uma metodologia organicista, inclusiva de todas as possibilidades operativas, cruzam-se componentes ecológicas, figurais e processuais, identificando a mat

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39

García, González Carlos A. "Use of the supercritical fluid technology for the preparation of nanostructured hybrid materials and design of the interface." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/42297.

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Los materiales compuestos nanoestructurados son considerados una opción prometedora para la concepción de materiales multifuncionales. Sin embargo, la falta habitual de interacción entre los componentes orgánicos e inorgánicos en los materiales híbridos nanoestructurados comporta unas propiedades macroscópicas anisotrópicas que limitan su uso. Por ello, se hace necesario el diseño de la interfase formada entre los componentes mencionados a fin de mejorar sus prestaciones. En esta Tesis Doctoral se ha optado por el uso de dióxido de carbono supercrítico (scCO2) para la modificación superf

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40

Nazarova, Cherriere Marfa. "Wettability study through x-ray micro-ct pore space imaging in eor applied to lsb recovery process." Thesis, Pau, 2014. http://www.theses.fr/2014PAUU3030/document.

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La thèse a pour but d’étudier les effets de changements de mouillabilité de roches dans des conditions d’injections d’eau douce en tant que méthode de récupération d’hydrocarbures. Afin d’identifier le ou les mécanismes à l’origine du gain additionnel de récupération nous avons utilisé un microtomographe RX. Nous avons ainsi imagé les états de saturations finales d’un milieu poreux rempli de saumures et d’huiles. Une fois le drainage primaire réalisé nous avons effectué deux phases d’imbibitions : avec une saumure (récupération secondaire) puis une imbibition d’eau douce (récupération tertiair

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Zamudio, Michelle. "The separation of detergent range alkanes and alcohol isomers with supercritical carbon dioxide." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86434.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Data on the process performance at different operating conditions are required to determine the feasibility of a separation process. Such data can be experimentally measured, but due to the time and costs associated with pilot plant scale experiments, the use of predictive process models are often preferred. The main aim of this project is to establish a working process model in Aspen Plus® that can be used to predict the separation performance of a supercritical fluid fractionation process aimed at the separation of mixtur

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42

Moraes, Moysés Naves de 1982. "Extração de tocotrienol de sementes de urucum (Bixa orellana L) por extração supercrítica em operação pseudocontínua integrada à extração com solvente a baixa pressão para obtenção de bixina." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254903.

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Orientador: Maria Angela de Almeida Meireles<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-26T11:16:03Z (GMT). No. of bitstreams: 1 Moraes_MoysesNavesde_D.pdf: 11795880 bytes, checksum: 816fd6cdb3996f8cf9ea868d729c0050 (MD5) Previous issue date: 2015<br>Resumo: A busca por produtos naturais que apresentem elevado grau de pureza tem impulsionado pesquisas por processos de extração e, preferencialmente, que não agridam o meio ambiente. Assim, processos de extração com fluido supercrítico (SFE ¿ Supercritical

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43

Catai, Rodrigo Eduardo [UNESP]. "Otimização das condições de refrigeração / lubrificação no processo de retificação cilíndrica de mergulho." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/105369.

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Made available in DSpace on 2014-06-11T19:34:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-10Bitstream added on 2014-06-13T19:44:44Z : No. of bitstreams: 1 catai_re_dr_guara.pdf: 5048506 bytes, checksum: 92a0c290f63def07988a569548fd0d34 (MD5)<br>Universidade Estadual Paulista (UNESP)<br>Diante do elevado desenvolvimento tecnológico mundial, o processo de retificação surge cada vez mais como um dos processos de usinagem mais importantes dentro das indústrias. Diante disto, na procura incessante por processos mais capazes e econômicos é que as empresas vêm buscando a otimização da

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Moncho, Esteve Ignacio José. "Procesos de Mezcla en Flujos Turbulentos con Técnicas de la Mecánica de Fluidos Computacional (CFD)." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90573.

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The mixing processes are present in the hydraulics engineering field as well as in the environmental field, and they appear in many different situations that are of great interest for humankind. The mechanisms that rule these processes can be very diverse and complex, these being able to interact with each other. However, when a fluid has a turbulent behavior, it is highly unstable and three-dimensional, modifying greatly the other mixing processes. In these cases, the resolution for the fluid mechanics with classical methods can be extremely difficult, making the use of approximations and mod

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Sedláková, Eva. "Technologická a ekonomická analýza výroby součástí pro automobilový průmysl." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401046.

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The thesis deals with an analysis of an existing technology of thread forming under various technological parameters used in car industry. Furthermore, it characterizes metric threads, their production and quality control, forming taps, process fluids and other process parameters. In the experimental part the experimental tests with a conventional and CNC drilling machines were carried out. The influence of various process fluids on surface and thread quality have been assessed statistically. The technical-economic evaluation of the process fluids and their effect on the technology has been ma

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Benmezroua, Boumediene. "Etude numérique et expérimentale, à l'échelle microstructurelle, du transport granulaire dans les matériaux poreux saturés." Phd thesis, INSA de Rennes, 2011. http://tel.archives-ouvertes.fr/tel-00790188.

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Le transport de particules solides dans un matériau poreux saturé, sujet à l'écoulement de fluide se produit dans les milieux naturels et dans diverses applications liées au génie civil. Ces particules solides peuvent colmater les interstices du matériau poreux et par conséquent réduire sa perméabilité ou au contraire se détacher du matériau poreux et provoquer son érosion. Ainsi, cette thèse s'attache à étudier à l'échelle des grains du matériau poreux les mécanismes du transport de particules en présence d'écoulement de fluide incompressible et de calculer les interactions fluide-solide pour

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Tschaikowski, Max. "Fluid aggregations for Markovian process algebra." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-171109.

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Quantitative analysis by means of discrete-state stochastic processes is hindered by the well-known phenomenon of state-space explosion, whereby the size of the state space may have an exponential growth with the number of objects in the model. When the stochastic process underlies a Markovian process algebra model, this problem may be alleviated by suitable notions of behavioural equivalence that induce lumping at the underlying continuous-time Markov chain, establishing an exact relation between a potentially much smaller aggregated chain and the original one. However, in the modelling of ma

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Vermaut, Delphine. "Maîtrise de l'enduction grande vitesse d'un filament de carbure de silicium par un alliage de titane liquide." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14311/document.

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Le procédé d’enduction grande vitesse d’un filament de carbure de silicium de type SCS-6 par du titane liquide constitue une voie d’élaboration innovante pour la réalisation de composites à matrice métallique. Cependant, un mauvais mouillage entre le filament et le titane liquide et la formation de perles de titane le long de ce filament au cours de l’enduction ne permettaient pas de maîtriser le procédé pour la réalisation des matériaux composites. Les travaux de la thèse ont donc consisté à identifier et comprendre l’ensemble des mécanismes entrant en jeu lors de l’enduction à grande vitesse

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Catai, Rodrigo Eduardo. "Otimização das condições de refrigeração / lubrificação no processo de retificação cilíndrica de mergulho /." Guaratinguetá : [s.n.], 2004. http://hdl.handle.net/11449/105369.

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Resumo: Diante do elevado desenvolvimento tecnológico mundial, o processo de retificação surge cada vez mais como um dos processos de usinagem mais importantes dentro das indústrias. Diante disto, na procura incessante por processos mais capazes e econômicos é que as empresas vêm buscando a otimização da retificação, por exemplo, através da redução da quantidade de fluido de corte a ser utilizada. Desta forma este projeto pretendeu explorar o conceito da utilização racional de fluidos de corte no processo de retificação, e a utilização de defletores aerodinâmicos para minimizar os efeitos das

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Charmchi, Isar. "Computational Fluid Dynamics (CFD) Modeling of a Continuous Crystallizer." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Crystallization is one of the most important separation and purification processes in chemical and especially in pharmaceutical industries. Currently most crystallization processes in the industry are based on batch crystallization; however, due to the variation of product quality per batch, efforts are made to move to continuous processes instead. In this respect, micro and meso scale reactors represents a promising technology due to enhanced heat and mass transfer rates, which, translated to particle generation, provide control of size, morphology, and composition. In this study, a meso-

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