Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 57 for “"Particle Deposition"”.
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The Analog Between Particle Deposition in a Pipe and Particle Deposition on a Flat Plate
Made available in DSpace on 2014-12-13T19:31:27Z (GMT). No. of bitstreams: 1 7616154.pdf: 4201185 bytes, checksum: 09f9fc915d1eede0453c680977cd0469 (MD5) Previous issue date: 1976
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Enhancement of fine particle deposition to permeable sediments
Predictions of deposition rate are integral to the transport of many constituents including contaminants, organic matter, and larvae. Review of the literature demonstrates a general appreciation for the potential control of deposition by bed roughness, but no direct tests involving flat sediment …
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Enhancement of fine particle deposition to permeable sediments
Predictions of deposition rate are integral to the transport of many constituents including contaminants, organic matter, and larvae. Review of the literature demonstrates a general appreciation for the potential control of deposition by bed roughness, but no direct tests involving flat sediment …
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Aerosol Filtration -- Agglomerate Particle Filtration and Particle Deposition Uniformity
<p>Particle control technologies are essential in many manufacturing industries (electronic and chemical industrial, mineral processing, and food and beverages) as well as in pollution abatement and environmental control (for example, post processing of power plant emissions and clean rooms). A …
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Effects of Surface Roughness on the Indoor Particle Deposition Rate Constant
<p>The purpose of this work was to quantify the deposition rate constants of size-classified particles on typical indoor surface materials as affected by the degree of surface roughness. The experiments were conducted in a small-scale acrylic chamber. The particle size range was from 0.723 to 5.048 …
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Pulmonary Particle Deposition in Relation to Age, Body Weight, and Species
… physiological conditions, therapeutic aerosol particles deposit differently in humans of various ages and body weights. These particles also deposit differently in non-human species that are often utilized in inhalation and dosing studies. The focus of this work is to determine the optimal …
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Study of micro-sized particle deposition using DEM, CFD-DEM and SPH approach
… and packing of colloids and micro or nano scale particles has become a subject of great interest due to widespread advancement of micro-scale technologies. In this thesis, several numerical analyses are performed to study the packing or self-assembly of micro or nano sized particles under dry or …
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Use of Lagrangian methods to describe particle deposition and distribution in dispersed flows
… of pipe diameter, gas and liquid flow rates on deposition rates in air-water annular flow. An estimate of the droplet slip ratios has been obtained. This provides an improved correlation of measured deposition rates with droplet concentration. In addition droplet slip ratios are useful for …
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Grease particle deposition measurements in a kitchen exhaust duct for the development of low cost grease sensors.
Grease deposition in kitchen exhaust ducts is an imminent fire hazard. There exists the need to quantize and measure the amount of grease deposition in a commercial kitchen exhaust duct in a cheap and efficient manner. Results from a real cooking emission study (ASHRAE 1375-RP) were used to model …
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Experimental Investigation of Initial Onset of Sand Deposition in the Turbine Section of Gas Turbines
Particle ingestion and deposition is an issue of concern for gas turbine engines operating in harsh environments. The ingested particles accelerate the deterioration of engine components and thus reduce its service life. This effect is observed to a greater extent in aircrafts/helicopters operating …
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Particulate Deposition Prediction of Diluted Two-Phase Impinging Jet
Insights into particle transport and deposition process in impinging jet flow, in light of the available experiments, can be gained using computational fluid dynamics (CFD) numerical simulations. The present thesis focuses mainly on the prediction of aerosol particle transport and deposition in …
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Simulated Syngas Ash Deposition on the Leading Edge of a Turbine Vane with Film Cooling
… to the engine hardware. Not much is known about particle deposition, erosion, and corrosion on turbine blades as a result of these contaminants. Performing deposition studies at engine like conditions can be difficult. This study presents a method for substituting the particles with polymer …
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Experimental Studies of Diesel Particle Filtration
… led to the widespread application of the diesel particle filter (DPF) in engine exhaust systems to limit emissions of combustion-generated particles. The collection of particulate matter in exhaust after-treatment devices depends on a number of mechanisms for aerosol particle deposition that are …
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A Computational Framework for Fluid-Thermal Coupling of Particle Deposits
… sand deposits and their surrounding fluid. Particle deposits that form in gas turbine engines and industrial burners, can change flow dynamics and heat transfer, leading to performance degradation and impacting durability. The proposed coupled framework allows insight into the coupled …
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On the full lagrangian approach and thermophoretic deposition in gas-particle flows
Theoretical and experimental studies of particle deposition in turbulent pipe flow have been carried out for over forty years, but some of the most important transport mechanisms are still not well understood. The first part of this thesis is concerned with the calculation of particle density when …
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Modeling and Simulation of Bubbles and Particles
… of motion was applied to air bubbles and sand particles of several different diameters. Particle-fluid interactions observed through flow-visualization, particle concentration, particle-wall interactions, and Lagrangian statistics were all considered. These results were interpreted and compared …
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Fundamental Study of Particle Formation, Transport, Deposition and Filtration for Semiconductor Applications
… EUV lithography system. As a result, the particle size of interest becomes smaller. Preventing and controlling particle contaminations is essential in the semiconductor manufacturing process to increase semiconductor yield. Examples of these unwanted nanoparticles in the semiconductor …
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Boundary layer transport of small particles
The transport of small particles across the aerodynamic boundary layer that developed over a smooth, flat, acrylic plate and their subsequent deposition was investigated. The velocity boundary layer over the flat plate was characterized for a wind tunnel mainstream velocity of 2 m/s. Particle …
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Development and characterisation of air-liquid interface exposure systems for cell and tissue cultures
… the respiratory tract requires consideration of particle deposition and gas dissolution within the complex structure of the respiratory system. Until the last decade or so, methodology relied heavily on animal models or limited, submerged cell culture models that did not capture air-liquid …
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