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Dissertations / Theses on the topic 'Method of dust particles'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Vachon, Nicholas. "A Bound Vortex Surface Impingement Method for Adhered Dust Particle Removal." ScholarWorks @ UVM, 2010. http://scholarworks.uvm.edu/graddis/233.

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Methods of dust mitigation in Martian and Lunar environments are an increasingly active area of research within the uid dynamic and aerospace community. Martian and Lunar environments produce electrically charged particles, which easily adhere to exposed surfaces. Adhered regolith particles can interfere with human comfort and mechanical functionality. In this work we investigate the potential to enhance particle removal through bound vortex surface impingement. A bound vortex ow condition is created using a specialized nozzle con guration where a combination of positive pressure in

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2

Píšala, Jan. "Vliv prachových částic na kluzný kontakt." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-399548.

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Master's thesis "effect of dust particles on sliding electrical contact" summarizes the sliding contact theory and praxe in rotating electrical machines. The principle of brush machines is described and the working environments are defined. The individual components of the sliding contact and reasons of their degradation are described in detail. Emphasis is placed on the influence of foreign particles, which can be assessed in practice by the method of dust particles. Furthermore, these theoretical knowledge was used in the practical assessment of the technical condition of various machines, a

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3

Akinsiku, Sileola B. "Detecting Organic Molecules on the Surface of Inorganic Dust Particles Using Aerosol Mass Spectrometry." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/369.

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Detection of organic molecules present on the surface of dust particles is important in homeland security, agriculture, and several other applications. The research presented reports the ability of the aerosol mass spectrometer (AMS) to detect molecules on the surface of dust particles without detecting the particle core. Experiments were carried out to detect semi-volatile organic compounds adsorbed onto the surface of particulates without interference from the dust particle core. Methyl salicylate, oleic acid, and organophosphorus pesticides such as Malathion were detected on the surface of

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4

Marstorp, Gustav. "Automated Control System for Dust Concentration Measurements Using European Standard Reference Method." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292583.

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Most companies that have any type of combustion or other pollution process via emission to air needs to measure their emissions to ensure they are within legal boundaries. Among the different types of pollution measurements, one of the most common is dust concentration, also known as particle concentration. An important factor in dust concentration measurements is to ensure that the concentration of the measured dust is representative to the dust concentration in the emissions. This is measured in isokinetic deviation, defined as (vn 􀀀 vd)=vd, where vn is the velocity in the entry nozzle and v

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5

Kopecký, Jiří. "Diagnostika kluzného kontaktu s využitím praktické aplikace „Metody prachových částic“." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219907.

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This thesis deals with the sliding contact of electrical machines and its diagnostic methods. Namely, the dust-particles method for assessing the length decrease of brushes is deeply described. Then, usage of the method in industry is described. The comparison of accuracy between manual version and new automated version of the method using computer analysis is presented. The final section is devoted to the practical verification of the new automated version which was developed especially for large machines. Measurements were performed on a small machine.

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6

Kurzępa, Marek. "Příspěvek k praktickému posouzení expresní metody pro hodnocení kvality kluzného kontaktu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221173.

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This thesis is devoted to the topic of kluzný kontakt and its diagnostic, especially to the type of diagnostic using the method of -- of dust particles. The author presents an example of applying this method and deals with the topic of development of a laboratory template that will give access to bigger variability in studying this method.

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7

Scandoleira, Fernando Cezar. "Desenvolvimento de método laboratorial de determinação de quantidade de particulados em suspensão no ar." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-16072013-164314/.

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Este trabalho apresenta os resultados que permitiram o desenvolvimento de um método simples e de baixo custo, para avaliações dos problemas causados pela quantidade de partículas sólidas suspensas no ar, que pode ser usado em escala laboratorial ou em usinas industriais de diversas áreas, mas especialmente no segmento de mineração. Por causa da baixa precisão dos métodos manuais existentes hoje (não se refere especificamente aos métodos eletrônicos) para a finalidade de determinação de quantidade de sólidos suspensos no ar, este estudo mostra a composição de um método com equipamentos já exist

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8

Alexander, Jennifer Mary. "Optical properties of mineral dust aerosol including analysis of particle size, composition, and shape effects, and the impact of physical and chemical processing." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/1819.

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Atmospheric mineral dust has a large impact on the earth’s radiation balance and climate. The radiative effects of mineral dust depend on factors including, particle size, shape, and composition which can all be extremely complex. Mineral dust particles are typically irregular in shape and can include sharp edges, voids, and fine scale surface roughness. Particle shape can also depend on the type of mineral and can vary as a function of particle size. In addition, atmospheric mineral dust is a complex mixture of different minerals as well as other, possibly organic, components that have been m

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9

Daryanani, Roshan D. "Potential distribution around dust particles in plasmas." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337811.

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10

Rost, Detlef. "TOF-SIMS analyses of interplanetary dust particles." [S.l. : s.n.], 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8832568.

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11

Cilwa, Katherine Elizabeth. "Surface Plasmon Polaritons and Single Dust Particles." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1301074124.

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12

Cilwa, Katherine E. "Surface Plasmons Polaritons and Single Dust Particles." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1304532704.

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13

Liu, Bing. "Characterisation of Dust Particles Trapped in Silica Aerogels." Thesis, KTH, Fusionsplasmafysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-38828.

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This thesis involves the study of dust particles trapped in silica aerogel for fusion dust diagnostics purpose. The low velocity impact experiments are done by implanting predefined dust particles into silica aerogel by using a springpiston air gun. The impact experiment results show that the hypervelocity impact model may not suitable for describing the fusion characteristic dust particles. The samples made by impact experiment are analyzed by ion microbeam analysis methods: Rutherford backscattering spectrometry (RBS) and Particle-induced X-ray Emission spectrometry (PIXE). The elements of d

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14

Jimoh, W. L. O. "Analytical studies of Harmattan dust." Thesis, Bucks New University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371226.

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15

Vignichouk, Ladislas Tancrède Raymond. "Dynamics of metallic dust particles in tokamak edge plasmas." Thesis, KTH, Rymd- och plasmafysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118454.

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The study of dust dynamics in tokamaks has been carried out by means of the DDFTU numericalcode solving the coupled equations of motion, charging and heat balance for a dust grainimmersed in plasmas with given profiles. The code has been updated to include (i) a non-steadystate heat balance model and phase transitions, (ii) geometrical properties of the vessel suchas gaps, (iii) realistic boundary conditions for dust-wall collisions. The models for secondaryelectron emission (SEE), thermionic emission and black body radiation have also been refined,and sensitivity of the results to the SEE str

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16

Eastwood, Michael Logan. "Ice nucleation on uncoated and coated atmospheric mineral dust particles." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1613.

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An optical microscope coupled to a flow cell was used to investigate ice nucleation on five atmospherically relevant mineral dusts at temperatures ranging from 233 to 247 K. Kaolinite and muscovite particles were found to be efficient ice nuclei in the deposition mode, requiring relative humidities with respect to ice (RHi) below 112% in order to initiate ice crystal formation. Quartz and calcite particles, by contrast, were poor ice nuclei, requiring relative humidities close to water saturation before ice crystals would form. Montmorillonite particles were efficient ice nuclei at temperature

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17

Takamura, S., T. Misawa, N. Ohno, et al. "Dynamic behaviors of dust particles in the plasma–sheath boundary." American Institute of Physics, 2001. http://hdl.handle.net/2237/7044.

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18

Megahed, Khaled. "The impact of mineral dust aerosol particles on cloud formation." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=984083375.

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19

Kaltofen, Marco Paul Johann. "Assessing Human Exposure to Contaminants in House Dust." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/93.

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Airborne dusts can transport radioactive materials in the form of isolated individual radioactively-hot particles containing high concentrations of radioisotopes. These airborne particles may be inhaled or ingested, becoming a source of internal radiation exposure. After the March 11, 2011, nuclear reactor accidents at Fukushima Daiichi, in northern Japan; eighty-five Japanese environmental samples and 234 US and Canadian samples were collected and analyzed by gamma spectrometry, autoradiography, scanning electron microscopy with energy dispersive X-ray analysis (SEM/EDS), and total alpha and

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20

Jia, Qi. "Estimation of industrial dust using exposure-profiling method." Doctoral thesis, Luleå tekniska universitet, Geoteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18651.

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Dust is a primary cause for air quality deterioration, as well as a potential health hazard. Mining and construction sites, in particular, are the most profound in dust generation. The possible source activities are drilling, loading, transporting, dumping, crushing, stockpiles, waste rock and unprotected open surfaces, etc. Dust can be any airborne contaminants occur in the gaseous form or as aerosols. This research dealt with ‘fugitive dust’ which is defined as dust that could not reasonably pass through a stack, chimney, vent, or other functionally equivalent openings, and does not include

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21

Hartmann, Susan. "An immersion freezing study of mineral dust and bacterial ice nucleating particles." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-172542.

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Ice formation largely influences the properties of clouds and hence it has an important impact on weather and climate. Primary ice formation is a consequence of either homogeneous or heterogeneous ice nucleation. The latter process is catalyzed by a foreign substance called Ice Nucleating Particle (INP). Mineral dust particles were found to contribute to atmospheric INPs. Most types of mineral dust are ice active below -20 °C. In contrast, atmospheric observations indicate that immersion freezing as one of the most important heterogeneous ice nucleation processes can occur at temperatures high

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22

Sullivan, Ryan Christopher. "Heterogeneous chemistry of atmospheric mineral dust particles and their resulting cloud-nucleation properties." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3331170.

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Thesis (Ph. D.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed Dec. 11, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

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23

Weckmann, Armin. "Material migration in tokamaks: Studies of deposition processes and characterisation of dust particles." Licentiate thesis, KTH, Fusionsplasmafysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-178026.

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Thermonuclear fusion may become an attractive future power source. The most promising of all fusion machine concepts is the tokamak. Despite decades of active research, still huge tasks remain before a fusion power plant can go online. One of these important tasks deals with the interaction between the fusion plasma and the reactor wall. This work focuses on how eroded wall materials of different origin and mass are transported in a tokamak device. Element transport can be examined by injection of certain species of unique and predetermined origin, so called tracers. Tracer experiments were co

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24

Li, Fan. "Interactions between fine particles." Thesis, University of Leicester, 2009. http://hdl.handle.net/2381/4494.

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Computer simulation using the Discrete Element Method (DEM) has emerged as a powerful tool in studying the behaviour of particulate systems during powder flow and compaction. Contact law between particles is the most important input to the Discrete Element simulation. However, most of the present simulations employ over-simplistic contact laws which cannot capture the real behaviour of particulate systems. For example, plastic yielding, material brittleness, sophisticated particle geometry, surface roughness, and particle adhesion are all vitally important factors affecting the behaviour of pa

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25

Tang, Mingjin [Verfasser]. "Atmospheric heterogeneous reactions of N2O5 and NO3 radicals with mineral dust particles / Mingjin Tang." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1019194278/34.

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26

Xie, Yanxuan. "Study of Interaction of Entrained Coal Dust Particles in Lean Methane-Air Premixed Flames." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/1065.

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"This study investigates the interaction of micron- sized coal particles entrained into lean methane €“ air premixed flames. In a typical axisymmetric burner, coal particles are made to naturally entrain into a stream of the premixed reactants using an orifice plate setup. Pittsburgh seam coal dust, with three particle sizes in the range of 0 to 25 µm, 53 to 63 µm, and 75 to 90 µm is used. The effects of different coal dust concentrations (10 €“ 300 g/m3) at three lean equivalence ratios, ϕ (methane-air) of 0.75, 0.80 and 0.85 on the laminar burning velocity are determined experimentally. The

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27

Whelan, Paul. "Raman microscopy studies of carbon particles from diesel particulate matter (DPM) and coal dust." Thesis, Sheffield Hallam University, 2001. http://shura.shu.ac.uk/17384/.

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Diesel Particulate Matter (DPM) and coal dust samples were characterised using Raman microscopy, X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), Thermo-Gravimetric Analysis (TGA), X-ray Fluorescence (XRF) spectrometry and Scanning electron Microscopy. The sp2/sp3 carbon bonding ratios for DPM and coal dust were determined as 6.1 and 0.7, respectively, from XPS. Principal Component Analysis (PCA) was successfully implemented as a tool for distinguishing between the very similar DPM and coal dust Raman spectra, with over 99% of the va

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28

Santa, Nestor. "Demonstration of Optical Microscopy and Image Processing to Classify Respirable Coal Mine Dust Particles." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103919.

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Inhalation of respirable coal mine dust (RCMD) can lead to chronic lung diseases, including coal worker’s pneumoconiosis (CWP) and more severe forms such as progressive massive fibrosis. After the Federal Coal Mine Health and Safety Act was passed in 1969, limits on exposure to respirable dust were set, and the prevalence of CWP abruptly decreased. However, during the last two decades, a resurgence of the disease has been reported. Many authors have argued that the increasing numbers might be related to mining practices, including the extraction of thinner coal seams, characteristics of the mi

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Quinn, Dale Edward Physics Australian Defence Force Academy UNSW. "Scattering of light by dust in bipolar outflow sources." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Physics, 2001. http://handle.unsw.edu.au/1959.4/38687.

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Interstellar dust plays an important role in the physics of the interstellar medium, as well as the formation and evolution of stars. The presence of dust is often indicated in optical images by dark lanes which bisect spiral galaxies, or seen directly as reflection nebulosity around stars or emission nebulosity if sufficient heating is present. Of interest in this thesis is the dust that is associated with bipolar outflow sources. Bipolar outflows can occur in either evolved stars or in young stellar objects, and are so named because they consist of two lobes which are thought to be due to ou

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30

Mohan, Mahesh. "Polarimetric models of circumstellar discs including aggregate dust grains." Thesis, University of Hertfordshire, 2016. http://hdl.handle.net/2299/17229.

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The work conducted in this thesis examines the nature of circumstellar discs by investigating irradiance and polarization of scattered light. Two circumstellar discs are investigated. Firstly, H-band high contrast imaging data on the transitional disc of the Herbig Ae/Be star HD169142 are presented. The images were obtained through the polarimetric differential imaging (PDI) technique on the Very Large Telescope (VLT) using the adaptive optics system NACO. Our observations use longer exposure times, allowing us to examine the edges of the disc. Analysis of the observations shows distinct signs

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31

Vaughan, Bryan A. M. "Characterisation and calibration of the 'Stardust' dual acoustic sensor system." Thesis, University of Kent, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365211.

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32

Vlasenko, Alexander Lvovich. "Aerosol flow of the heterogeneous interaction between submicron mineral dust particles and gaseous nitric acid /." Bern : [s.n.], 2006. http://www.zb.unibe.ch/download/eldiss/06vlasenko_a.pdf.

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33

Murillo, Carlos. "Experimental and numerical approaches to particles dispersion in a turbulent flow : application to dust explosions." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0040/document.

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Les caractéristiques d’un nuage de poussières avant l’activation de la source d’inflammation ont une grande influence sur la sensibilité et la sévérité de son explosion. Pour cette raison, le procédé de dispersion d’une poussière combustible qui se développe à l’intérieur des chambres d’explosion standardisés telles que le tube de Hartmann modifié et la sphère 20 L a été décrit par deux approches complémentaires. Dans un premier temps, une caractérisation expérimentale de l’évolution du nuage de poussière a identifié les niveaux de turbulence de l’écoulement de gaz, ainsi que les principales v

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34

Gankanda, Aruni. "Heterogeneous and multiphase chemistry of trace atmospheric gases with mineral dust and other metal containing particles." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3090.

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Particulate matter in the atmosphere emitted from various natural and anthropogenic sources is important due to their effects on the chemical balance of the atmosphere, the Earth's climate, human health and biogeochemical cycles. Although there have been many studies performed to understand the above effects, there still remains substantial uncertainty associated with processes involved and thus it is difficult for current atmospheric chemistry and climate models to reconcile model results with field measurements. Therefore, it is important to have better agreement between models and observati

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Schladitz, Alexander. "Parametrization of relative humidity- and wavelength-dependent optical properties of mixed Saharan dust and marine aerosol." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-70494.

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Aerosol particles interact with sunlight through scattering and absorption and have therefore a direct radiative effect. Hygroscopic aerosol particles take up water and are able to grow in size below 100% relative humidity, which involves the change of optical properties and the direct radiative effect. The change of aerosol optical properties for aerosol mixtures under humidification is presently not well understood, especially for the largest particle sources worldwide. The present PhD-thesis quantifies wavelength- and humidity-dependent aerosol optical properties for a mixture of Saharan mi

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Eames, Ian. "Displacement of material by a solid body moving away from a wall." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362975.

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Chen, Yongcheng. "Method of measurement of dust deposition and generation rates for livestock buildings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24054.pdf.

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38

McCall, David Samuel. "Measurement and modelling of light scattering by small to medium size parameter airborne particles." Thesis, University of Hertfordshire, 2011. http://hdl.handle.net/2299/6374.

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An investigation into the light scattering properties of Saharan dust grains is presented. An electrodynamic trap has been used to levitate single dust particles. By adjusting the trap parameters, partial randomisation of the particle orientation has been introduced. While levitated, the particles were illuminated by a laser, and a rotating half-wave retarder enabled selection of vertically or horizontally polarized incident light. A laser diffractometer and linear photodiode array have been used to measure intensity at scattering angles between 0.5° and 177°. Combining these measurements with

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Nabeel, Muhammad. "A study of micro-particles in the dust and melt at different stages of iron and steelmaking." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196805.

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The dust particles generated due to mechanical wear of iron ore pellets and clusters formed in molten stainless steel alloyed with rare earth metals (REM) are considered in this study. Firstly, the influence of the characteristics of iron ore pellets, applied load on a pellet bed and partial reduction of the pellets on the size distribution of the generated dust was investigated. Secondly, REM clusters are investigated to evaluate the size distribution of the clusters. Also, an extreme value distribution (EVD) analysis has been applied for the observed REM clusters. The large sized pellets sho

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Velázquez, Gómez Miquel. "Organic pollutants in indoor dust: method development, site-specific monitoring and human exposure." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667906.

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Dust has been used as a surrogate of indoor organic contamination for several decades. Their concerns for human health include from sensitization effects such as allergies to toxic effects derived from those organic pollutants adsorbed to the dust particles, such as neurotoxicity, endocrine disruption and carcinogenic responses. Given that nowadays people spend more than a 90% of their time indoors, the exposure to this cocktail of pollutants is a challenge that must be handled. The present PhD thesis project develop instrumental methods for the quantitative analysis of the levels of org

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Liu, Yang, and Ziyu Wang. "The Numerical Computation Method of Physical Quantity of Dust Concentration Based on Matlab." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-19149.

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With the rapid development of the industry all over the world, the consumption of fossil fuel of human activities has reached an extremely high level which result in an incredible dust emission level nowadays. As one of the major environment challenges today, dust pollution has become a vital issue that the human beings have to face and resolve. To tackle the dust pollution problem, a reliable measurement of the dust concentration level is essential. In recent years, methods with different principles are used to detect the dust concentration have been developed. The methods developed based

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42

Bauer, Stefan. "Airborne spectral radiation measurements to derive solar radiative forcing of Saharan dust mixed with biomass burning smoke particles." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-150182.

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This dissertation deals with spectral measurements of solar radiation in the visible and near infrared wavelength range. The data were collected during a field campaign on the Cape Verde Islands in January / February 2008 within the DFG research group SAMUM 2 (Saharan Mineral Dust Experiment). During this campaign airborne measurements of upward radiances and irradiances were performed over aerosol layers. Since the Cape Verde Islands are in the advection area of air masses from the Sahara region northeast of the islands and from regions with bush fires from the southeast, the sampled aerosol

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Wozniakiewicz, Penelope. "Uncovering the Mineralogy of Cometary Dust : Investigating the Effect of Capture on Cometary Particles Impacting Stardust Collector Foils." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501218.

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44

Ben, Moussa Rim. "Contribution to thermal radiation to dust flame propagation : application to aluminium dust explosions." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2401/document.

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Ces travaux de thèse sont consacrés à l’examen du rôle du rayonnement thermique dans le processus de propagation des flammes issues de la combustion des particules d’aluminium dans l’air. Le sujet étant complexe et d’un intérêt industriel, il nécessite de prendre en compte le couplage de nombreux phénomènes physico-chimiques afin de prédire finement les conséquences des explosions de poussières. Une analyse bibliographique approfondie est proposée, concernant les mécanismes d’inflammation et de combustion des particules d’aluminium et aussi concernant les connaissances relatives à la propagati

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Heidernätsch, Mario, Michael Bauer, Daniela Täuber, Günter Radons, and Christian von Borcyskowski. "An advanced method of tracking temporarily invisible particles in video imaging." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191774.

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46

Majidi, Behzad. "Discrete Element Method Applied To The Vibration Process Of Coke Particles." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29386/29386.pdf.

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Les propriétés physiques, mécaniques et chimiques des matières premières ont un effet majeur sur la qualité des anodes en carbone pour le procédé de production d’aluminium. Ce travail tente d’étudier la faisabilité de l’application de simulation de la Méthode des Élément Discrets (DEM) à la technologie de production d’anodes. L’effet de la forme des particules et de la distribution de leurs tailles sur la densité apparente vibrée (VBD) d’échantillons de coke sec est étudié. Les particules de coke sont numérisées en utilisant des techniques d’imagerie à deux et trois dimensions. Ces images donn

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Schwarz, Stephan. "An immersed boundary method for particles and bubbles in magnetohydrodynamic flows." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-142500.

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This thesis presents a numerical method for the phase-resolving simulation of rigid particles and deformable bubbles in viscous, magnetohydrodynamic flows. The presented approach features solid robustness and high numerical efficiency. The implementation is three-dimensional and fully parallel suiting the needs of modern high-performance computing. In addition to the steps towards magnetohydrodynamics, the thesis covers method development with respect to the immersed boundary method which can be summarized in simple words by From rigid spherical particles to deformable bubbles. The developmen

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Sallam, Amr M. "Studies on modeling angular soil particles using the discrete element method." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000574.

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Heidernätsch, Mario, Michael Bauer, Daniela Täuber, Günter Radons, and Christian von Borcyskowski. "An advanced method of tracking temporarily invisible particles in video imaging." Diffusion fundamentals 11 (2009) 111, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14085.

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Csontos, Botond. "Development of a method to measure “soft particles” in the fuel." Thesis, KTH, Skolan för kemivetenskap (CHE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206547.

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As environmental awareness raises the expectations to reduce emission of modern diesel engines are growing as well. Fuel diversity and the advanced injector systems requires even more attention on an ever existing problem which is called nozzle hole fouling. Recent literature and observations at Scania indicate the phenomena is connected to fuel filter plugging caused by metal carboxyl contaminants through the formation of “soft particles”. This report begins with a literature review about the nature of agglomerates in biodiesel. Followed by the evaluation of six particle sizing equipment. Thi

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