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Dissertations / Theses on the topic 'Mechanical particles'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Rumble, Katherine Ann. "Mechanical properties of particle-stabilised liquid-liquid interfaces." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31199.

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Over the past couple of decades interest in particle-stabilised emulsions or Pickering emulsions has greatly increased. When using particles as stabilisers, as opposed to surfactants, the interface becomes more rigid and this can lead to interesting physical properties. In addition, the resulting emulsions are found to be longer-lived garnering commercial interest. This thesis aims to explore the mechanical properties of some specific systems containing particle-stabilised interfaces. The main system investigated was the bicontinuous interfacially jammed emulsion gel or bijel. The bijel has tw

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2

Asmatulu, Ramazan. "Advanced Chemical-Mechanical Dewatering of Fine Particles." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/26604.

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In the present work, novel dewatering aids and a novel centrifuge configuration were developed and applied for the purpose of dewatering fine particles. Three different types dewatering reagents were tested in different filtration and centrifugation units. These chemicals included low-HLB surfactants, naturally occurring lipids, and modified lipids. Most of these reagents are insoluble in water; therefore, they were used in solutions of appropriate solvents, such as light hydrocarbon oils and short-chain alcohols. The role of these reagents was to increase the hydrophobicity of the coal and

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3

Tsay, Jessica 1983. "Segregation of granular particles in suspension flow." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32791.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Includes bibliographical references (leaf 22).<br>An experiment was conducted to investigate the development of longitudinal stripes of granular particles due to instabilities in particle suspension flow. Research was conducted to characterize environmental phenomena related to granular flows, namely avalanches, mudslides, and the movement of glaciers. Results show the stripes were found to appear with a particle concentration of 10% by volume at angles of 20 degrees, at a particle concentration of

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4

Chan, Wai Hong Ronald. "Non-linear electrophoresis of ideally polarizable particles." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92603.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 219-229).<br>This thesis investigates the non-linear regime of electrophoresis, in particular the variation of electrophoretic velocity with electric field at high field strengths. Known theoretical approaches to the problem accounting for ion ster

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5

Pitsillides, Costas M. 1973. "Selective cell targeting with light-absorbing particles." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/89257.

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6

Dou, Guangbin. "Mechanical and electrical characterisation of anisotropic conductive adhesive particles." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/35569.

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This thesis presents research into the mechanical and electrical characterisation of Anisotropic Conductive Adhesive (ACA) particles and their behaviour within typical joints. A new technique has been developed for study of individual ACA particle mechanical and electrical performance when undergoing deformation. A study of the effects of planarity variations on individual electrical joints in real ACA assemblies is presented firstly, followed by the research on the mechanical deformation and electrical tests of individual ACA particles undergoing deformation. In the co-planarity research, exp

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7

Singer, Simcha Lev. "Gasification and combustion modeling for porous char particles." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74934.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Gasification and combustion of porous char particles occurs in many industrial applications. Reactor-scale outputs of importance depend critically on processes that occur at the particle-scale. Because char particles often possess a wide range of pore sizes and react under varying operating conditions, predictive models which can account for the numerous physical and chemical processes and time-dependent boundary cond

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8

Li, Xiaoyan 1963. "Coagulation between fractal aggregates and small particles and fractal properties of marine particles." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282174.

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This dissertation includes two parts (designated A and B) that serve two separate but related research purposes. In Part A, coagulation rates between fractal aggregates (200-1000 μm) and small (1.48 μm) particles were studied for collisions induced by differential sedimentation and turbulent fluid shear. The collision frequency functions (beta) between these aggregates and small particles were found to be lower than predicted by a rectilinear collision model but much higher than predicted by a curvilinear collision model for equivalent impermeable spheres. The collision frequencies decreased w

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9

Janidlo, Stephen. "High velocity impact and fragmentation of reactive metallic particles." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81542.

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Near-field blast effects for centrally initiated spherical heterogeneous explosive charges have been investigated experimentally. The charges consisted of a packed bed of reactive particles saturated with a liquid explosive. Once the charge was detonated, the particles accelerated to high velocities and impacted a rigid plate or cantilever gauges. The positive phase pressure impulse at the rigid plate surface and the cantilever bend angles were measured at various distances. Comparison of the results for large diameter Zirconium (millimetre-sized) and small diameter Aluminum particles (

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10

Born, Melanie P. (Melanie Providencia) 1975. "Ice and abrasive particles : an alternative CMP polishing technique." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9570.

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11

Cheng, Kamyin. "Effective Young's Modulus of rigid particles in Gelatin composites." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59901.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 50).<br>In many biological systems, small rigid parts are embedded in deformable tissues to perform different biological functions. This study examines the effects of adding rigid filler particles inside deformable material. More specifically, a series of experiments led to eventual understanding of the relationship between effective Young's Modulus of material and volume fraction of rigid particles. The deformable mate

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12

Raafat, Mohamed Salem. "Self-sorting of deformable particles in a microfluidic circuit." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62536.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 54-57).<br>In this thesis, a new microfluidic device is presented for sorting of deformable particles based on the hydrodynamic resistance induced in a microchannel. Hydrodynamic resistance can be related to physical properties, including size and deformability of the particle, and can also be influenced by particle-wall interactions, hence allowing sorting based on any of these characteristics. This device could find a

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13

Luu, Trang (Trang N. ). "Solid particles flow through labyrinth channels in drip emitters." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119949.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 24-25).<br>Clogging of drip irrigation emitters can reduce the effectiveness of drip irrigation systems. The most common way of studying clogging in a laboratory setting is to recreate the actual timing conditions of on-site drip irrigation systems. However, this requires a clogging period on the order of hours to days and an intermission period on the order of days to weeks. This thesis explores the recreation o

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14

Faletra, Melissa Kathleen. "Segregation of Particles of Variable Size and Density in Falling Suspension Droplets." ScholarWorks @ UVM, 2014. http://scholarworks.uvm.edu/graddis/265.

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The problem of the falling under gravity suspension droplet was examined for cases where the droplet contains particles with different densities and different sizes. Cases examined include droplets composed of uniform-size particles with two different densities, of uniform-density particles of two different sizes, and of a distribution of particles of different densities. The study was conducted using both simulations based on Oseenlet particle interactions and laboratory experiments. It is observed that when the particles in the suspension droplet have different sizes and densities, an intere

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15

Nieto, Gamboa Cristian Julian. "Mechanical behavior of rockfill materials - Application to concrete face rockfill dams." Phd thesis, Ecole Centrale Paris, 2011. http://tel.archives-ouvertes.fr/tel-00619604.

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Le barrage poids en enrochement dont l'étanchéité est assurée par un masque en béton sur sa face amont est de plus en plus utilisé aujourd'hui. Son appellation courante est " CFRD1 ". La conception de ce type d'ouvrage est effectuée en suivant des " règles " de conception empiriques. Dans la dernière décennie, plusieurs barrages de type CFRD de grande hauteur ont subi la rupture de leur masque en béton lors de la première mise en eau, montrant ainsi la défaillance de l'approche empirique.Il s'avère alors nécessaire de comprendre les mécanismes physiques mis en jeu, notamment dans le comporteme

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16

Ma, Jack Jeinhao. "Thermal conductivity of fluids containing suspension of nanometer-sized particles." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36248.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.<br>Includes bibliographical references (leaves 59-62).<br>Nanofluids, which are fluids containing suspension of nanometer-sized particles, have been reported to possess substantially higher thermal conductivity than their respective base fluids. This thesis reports on an experimental study of the effect of base fluid, particle size, particle volume concentration, and sonicating technique on the thermal conductivity enhancement of nanofluids. Thermal conductivity measurements for several combinations of

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Cartas, Ayala Marco Aurelio. "Hydrodynamic resistance and sorting of deformable particles in microfluidic circuits." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79312.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Sorting of microparticles has numerous applications in science and technology, from cell analysis to sample purification for biomaterials, photonics, and drug delivery. Methods used for particle separation relied only on procedures that involved sedimentation, filtration through porous material or other physical procedures that could be performed macroscopically and in bulk; only recently has miniaturization of fluid

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18

Tan, Jun. "Mechanical properties characterisation of silicon carbide layers in simulated coated particles." Thesis, University of Manchester, 2010. https://www.research.manchester.ac.uk/portal/en/theses/mechanical-properties-characterisation-of-silicon-carbide-layers-in-simulated-coated-particles(ef03dbb5-f61a-44f3-a4d9-57e3fb042e16).html.

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In the TRISO (tristructural isotropic) coated fuel particle used in the High Temperature Reactor, the most important layer is a silicon carbide layer which acts as a pressure vessel. In this study, we have focused our study on the investigation of the Young’s modulus, hardness, residual stress, and fracture toughness of the SiC layer. Moreover, microstructures and impurities in silicon carbide were characterised and then related to both Young’s modulus and hardness of the SiC layer. Both nanoindentation and micro-indentation were used to determine Young’s modulus and hardness of the SiC. Raman

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19

Zhang, Jianing. "Effect of nano-particles on mechanical properties of epoxy-based composites." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12787.

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A comprehensive experimental investigation has been successfully conducted to characterise effects of a reactive liquid carboxyl-terminated butadiene-acrylonitrile (CTBN) rubber, nanosilica, halloysite nanotubes (HNTs), and hybrid particles of CTBN liquid rubber with nanosilica or halloysite on mechanical properties of the cured epoxies and the fibre-reinforced epoxy composites. Mechanical characterisations on the modified bulk epoxy showed that the hybrid particles, consisting of CTBN rubber and nanosilica or halloysite are effective additives to significantly increase the fracture toughness

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20

Popoola, Kolapo Albert. "Mechanical reinforcement of films from rubber latices by added polymer particles." Thesis, London Metropolitan University, 1988. http://repository.londonmet.ac.uk/2988/.

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Various factors and filler characteristics which influence the ability of added polymer particles prepared as latices by emulsion polymerisation to reinforce the mechanical properties of films derived from rubber latices, particularly post-vulcanised natural rubber latex, have been investigated. The emphasis has been upon the enhancement of tear strength and puncture strength.

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21

Kalaparthi, Vivekanand. "Self-Assembly of Nanoporous Silica Particles for Tagging and Sensing Applications." Thesis, Tufts University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10621642.

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<p> Meso(nano)porous silica particles are of broad interest for many photonic applications, filtration, drug delivery, catalysis. Through a self-assembly process, one can achieve silica particles spanning in size from microns to tens of nanometer. In the early stage of self-assembly it is observed that 20–50 nm seed particles are formed with hexagonally packed open cylindrical nanochannels. However, what is unknown is how these seed-like particles aggregate and self-align their pores to form final multi-micron particles with self-sealed channels extended over the entire particle. In the

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22

Turley, Audrey Therese. "Physical, Chemical, and Toxicological Characteristics of Combustion Generated Soot-Iron Particles." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-01082008-094249/.

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Experiments examined soot generated from atmospheric pressure ethylene/air laminar diffusion flames. Without ferrocene addition, pure soot particles were collected. Addition of controlled quantities of ferrocene produced particles containing both iron and soot with iron contents up to 15%. The physical and chemical characteristics of the samples were characterized using a scanning mobility particle sizer (SMPS), X-ray fluorescence spectroscopy (XRF), and carbon aerosol analysis. Results indicated that iron addition caused a substantial reduction in the soot aerosol mass emissions and a notable

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23

Twist, Christina P. "Tribological Interfaces and Fluid Flows Containing Particles and Chemically Designed Additives." Thesis, Northwestern University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3595756.

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<p> This work investigates bi-phase flows in a series of experimental and computational studies with a tribological focus. Three silver-based complexes are chemically designed, through collaboration with the Marks group, for use as additives in high-temperature lubrication. Mixtures of engine oil and various concentrations of these nanoparticle complexes lubricate sliding steel surfaces in ball-on-disk tests. Friction and wear measurements demonstrate that the silver complexes provide beneficial wear reduction over a range of temperatures and loads. The silver pyrazole-pyridine complex in par

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24

Nguyen, Thao D. (Thao Du Phuong) 1976. "Micromechanics of deformation in polymers modified by inorganic and rubber particles." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9587.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.<br>Includes bibliographical references (p. [189]).<br>Many structural polymers exhibit brittle behavior at low temperatures and/or high strain rates. It has been shown that the incorporation of rubber and inorganic particles can have significant toughening effects. Previous studies have shown that the particles can alter the matrix morphology at the particle-polymer interface to provide the material with a low shear yield strength tangential to the particle interface thus promoting extensive plastic fl

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25

Govender, Indresan. "X-ray motion analysis of charge particles in a laboratory mill." Doctoral thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/8642.

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Includes bibliographical references (p. [266]-273).<br>The work reported herein is of an automated X-ray vision system used to track the 3D trajectories of a typical bulk charge particle within an experimental Perspex mill, the intention of which is to simulate the grinding motion of rock found in typical industrial mills The experimental rig is constructed through an optimisation scheme that determines the maximum allowed dimensions of the mill that can be imaged by the X-ray system, however, the optimisation principle is not limited to the current study and can be employed to maximise any vo

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26

Uswatta, Suren Perera. "Injectable Particles for Craniofacial Bone Regeneration." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481305175641452.

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27

Tanguay, Vincent. "Combustion of reactive metal particles in high-speed flow of detonation products." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32579.

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It is common practice to add reactive metal particles to high-explosive formulations in order to increase the total energy output. The present study is an effort to increase the understanding of metal particle combustion in detonation products. Aluminum and magnesium particles ranging from 2 to 100 μm are subjected to the flow of detonation products of a stoichiometric mixture of hydrogen and oxygen. Luminosity emitted from the reacting particles is used to determine the reaction delay and duration. It is

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28

Wahlström, Jens. "Towards a simulation methodology for predictionof airborne wear particles from disc brakes." Licentiate thesis, KTH, Machine Design (Div.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11044.

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<p>During braking, both the rotor and the pads in disc brakes are worn. Since disc brakes are not sealed, some of the wear particles generated can become airborne. Several studies have found an association between adverse health effects and the concentration of particles in the atmosphere, so it is of interest to improve our knowledge of the airborne wear particles generated by disc brakes. However, in field tests it is difficult to distinguish these particles from others in the surrounding environment, so it may be preferable to use laboratory test stands and/or simulation models to study the

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29

Al-Asady, Riyadh Bakir Hasan. "Roller compaction : mechanical properties of primary particles, pre-compacted body and ribbon." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/15971/.

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30

Almas, Muhammad. "Effect of second phase particles on the thermo-mechanical processing of alloys." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47330.

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31

Sozer, Zeynep Bade. "Two-Dimensional Characterization of Topographies of Geomaterial Particles and Surfaces." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6866.

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The soil-structure interface is fundamental to the performance of many geotechnical engineering systems; including penetration test devices, deep foundations, and retaining structures. In geotechnical engineering structures, the counterface may range from a polymer in the case of a geosynthetically reinforced earth retaining structure to steel for cone penetration testing or pile foundations. Interface strength is affected by many factors, among which surface roughness is the most dominant. To date common practice has been to characterize counterface surface roughness by a roughness paramet

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Wahlström, Jens. "Towards a simulation methodology for prediction of airborne wear particles from disc brakes." Licentiate thesis, KTH, Maskinkonstruktion (Avd.), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11044.

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During braking, both the rotor and the pads in disc brakes are worn. Since disc brakes are not sealed, some of the wear particles generated can become airborne. Several studies have found an association between adverse health effects and the concentration of particles in the atmosphere, so it is of interest to improve our knowledge of the airborne wear particles generated by disc brakes. However, in field tests it is difficult to distinguish these particles from others in the surrounding environment, so it may be preferable to use laboratory test stands and/or simulation models to study the am

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33

Mihalik, Teresa Ann. "The quenching of gaseous hydrocarbon-air flames in packed beds of spherical particles /." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33337.

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In the present work, the quenching of gaseous hydrocarbon-air flames in packed beds of spherical particles has been investigated experimentally. Experiments were carried out in the standard flammability apparatus of Coward and Jones modified by the insertion of a packed bed of solid monosize spheres in the flame tube. Laminar flames were spark-initiated in quiescent combustible mixtures and failure or successful transmission of the flames through the packed bed was determined by visual observation. The quenching limits were determined as a function of the packed bed parameters (i.e., sphere ma

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Maleki, Karyak Mohsen. "Modeling and analysis of lipid bilayers with applications to vesicles and lipoprotein particles." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121455.

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Continuum approaches for modeling lipid bilayers are developed and applied to two-phase lipid vesicles and discoidal high-density lipoprotein (HDL) particles. First, relying on a three-dimensional model, the mechanics of a lipid bilayer with spontaneous curvature is considered. Kinematics, material symmetry, stress relations, and coherency of lipid bilayer leaflets are discussed. Treating a lipid bilayer as a thin structure, the areal energy density of a lipid bilayer with spontaneous curvature is obtained using a dimension-reduction procedure. Attention is paid on the source of spontaneous cu

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Sonn, Leigh M. "An assessment of software packages as applied to particles in a rotating mill." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5469.

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Includes bibliographical references.<br>This thesis evaluates three different software packages to test their potential use i ncomminution. The packages are ELFEN, ABAQUS and Particle Flow Code (PFC²D). The numerical codes differe in the method of inputting data as well as the theoretical models used. ELFEN and ABAQUS are finite element (FEM) packages wheras PFC²D uses the discrete element method (DEM). The packages also differ in the integration and contact schemes, as well as the method used to calculate the critical time step in the analysis.

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Chan, Siu Cheong. "The influence of nanoclay particles on polymer properties." Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.561104.

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The superior material properties of polymer/clay nanocomposites have attracted much research interests in the past years. The hypothesis of polymer stiffening in the vicinity of the nano-c1ay described using the "core-shell" model has not been fully investigated yet. The investigation of the interfacial region by atomic force microscopy (AFM) has provided us with details of the physical state of this region. It was found that the polymer stiffening region could extend as far as 200nm and 100nm from the face and the edge of a nano-clay respectively. Two different degrees of polymer stiffening h

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Druma, Calin. "A particle in cell formulation for extrusion of fluoropolymers." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1178048890.

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Larsen, Kyle Frederick. "Investigation of Particle Velocity and Drag with Spherical and Non-Spherical Particles Through a Backward Facing Step." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/974.

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Numerous practical applications exist where dispersed solid particles are transported within a turbulent accelerating or decelerating gaseous flow. The large density variation between phases creates the potential for significant differences in velocity known as velocity slip. Flow over a backward facing step provides a well characterized, turbulent, decelerating flow useful for measuring the relative velocities of the solid and gaseous phases in order to determine velocity slip and particle drag. Numerous investigations have been conducted to determine the gas phase velocity in a backward faci

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Rubio, Mario A. "Microexplosions and Ignition Dynamics in Engineered Aluminum/Polymer Fuel Particles." Thesis, Purdue University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10268368.

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<p> Aluminum particles are widely used as a metal fuel in solid propellants. However, poor combustion efficiencies and two-phase flow losses result due in part to particle agglomeration. Recently, engineered composite particles of aluminum (Al) with inclusions of polytetrafluoroethylene (PTFE) or low-density polyethylene (LDPE) have been shown to improve ignition and yield smaller agglomerates in solid propellants. Reductions in agglomeration were attributed to internal pressurization and fragmentation (microexplosions) of the composite particles at the propellant surface. </p><p> Here, we e

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Hong, Jinchul 1977. "Shear-induced migration and clustering mechansms of kaolinite clay particles under the oscillating face seal." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88867.

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WEN, YUEMIN. "NUMERICAL STUDY OF VARIABLE PROPERTY PLASMA FLOW OVER NON-SPHERICAL PARTICLES." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1069874978.

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Pawar, Vishal. "Use of laminar ESP for the capture of titanium dioxide particles." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176925565.

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Park, Seungkyung. "Electrokinetic and acoustic manipulations of colloidal and biological particles." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3199.

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Shandilya, Neeraj. "Study of the (nano) particles emission during mechanical solicitation and environmental weathering of the products." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2170/document.

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Les nanomatériaux manufacturés (comme les nanoparticules d’oxydes métalliques, les nanotubes de carbone, les nanofibres etc.) possèdent des propriétés remarquables qui leur confèrent des applications industrielles innovantes. Néanmoins, ces nouveaux matériaux soulèvent des inquiétudes vis à vis de leurs potentiels risques. Ces nanomatériaux manufacturés connaissent une production et une commercialisation croissantes. Par conséquent, de plus en plus de personnes sont potentiellement exposées à ces nanomatériaux (aussi bien les consommateurs que les opérateurs) à travers les aérosols qui pourrai

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Zhang, Huixing. "Mechanical and microstructural study of silicon carbide and pyrolytic carbon coatings in TRISO fuel particles." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/mechanical-and-microstructural-study-of-silicon-carbide-and-pyrolytic-carbon-coatings-in-triso-fuel-particles(64767ded-eafd-4ef6-a43f-8afbe0a07947).html.

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TRISO fuel particles have been developed as nuclear fuels used for a generation IV nuclear reactor: high temperature reactor. Such particle consists of a fuel kernel, pyrolytic carbon (PyC) and silicon carbide (SiC) coatings. This study has been carried out to establish a relationship between mechanical properties and microstructures of SiC coating and PyC coatings produced by fluidized bed chemical vapour deposition. Indentations were used to measure hardness, Young’s modulus and fracture behaviour of SiC and PyC coatings. Fracture strength of SiC coatings was measured by crush test. Microstr

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Mathias, James A. "High-Pressure Oxidation Rates for Large Coal and Char Particles." BYU ScholarsArchive, 1996. https://scholarsarchive.byu.edu/etd/8539.

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The main objective of this study was to investigate the factors that influence the oxidation rate of large (five to eight millimeters in diameter) coal and char particles. To accomplish this, experiments were performed in which the gas temperature, gas velocity, particle size, partial pressure of oxygen, and total pressure were varied. The experiments were performed with the cantilever balance attachment and the high pressure controlled profile reactor. Approximately 90 combustion experiments were performed with Pittsburgh, Utah Blind Canyon, and Wyodak-Anderson coal. These experiments were pe

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Wahlström, Jens. "A study of airborne wear particles from automotive disc brakes." Doctoral thesis, KTH, Maskinelement, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31152.

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During braking, both the disc and pads in disc brakes are worn. Since disc brakes are not sealed,some of the wear particles generated can become airborne. Several studies have found anassociation between adverse health effects and the concentration of particles in the atmosphere,so it is of interest to improve our knowledge of the airborne wear particles generated by discbrakes. This thesis deals with experimental and computational methods focusing on airborne wearparticles from disc brakes. The eight appended papers discuss the possibility to both measure andnumerically determine the concentr

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Farajidizaji, Farzad. "Numerical Modeling Of Collision And Agglomeration Of Adhesive Particles In Turbulent Flows." ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/926.

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Particle motion, clustering and agglomeration play an important role in natural phenomena and industrial processes. In classical computational fluid dynamics (CFD), there are three major methods which can be used to predict the flow field and consequently the behavior of particles in flow-fields: 1) direct numerical simulation (DNS) which is very expensive and time consuming, 2) large eddy simulation (LES) which resolves the large scale but not the small scale fluctuations, and 3) Reynolds-Averaged Navier-Stokes (RANS) which can only predict the mean flow. In order to make LES and RANS usable

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Ivosevic, Milan Cairncross Richard A. Knight Richard. "Splat formation during thermal spraying of polymer particles : mathematical modeling and experimental analysis /." Philadelphia, Pa. : Drexel University, 2006. http://hdl.handle.net/1860/1121.

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Inanli, Sinan. "Fluidization And Mixing Characteristics Of Biomass Particles In A Bubbling Fluidized Bed." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12610014/index.pdf.

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Fluidized bed is a suitable technology for combustion and gasification of biomass materials. Hydrodynamics occurring in the bed is crucial for the design and operation of the combustion or gasification unit. In the present study, hydrodynamic behavior of binary mixtures of biomass-silica sand in a bubbling fluidized bed was experimentally investigated. Five different biomass materials and silica sand with three different particle sizes were employed to form binary mixtures. Biomass materials were rice husk, sawdust, wheat straw, hazelnut shell and olive cake which are all potential energy sour

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