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 17 of 17 for “"Bulk Solids"”.
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Design and fabrication of a tapped densification apparatus for bulk solids
… used to ascertain the flow properties of bulk solids. One such property is a measurement quantity known as the tapped density. Here, a container of granular material is subjected to a long sequence of discrete taps, after which the bulk density - the total mass divided by the volume …
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On the development of new PolyArylEtherKetone bulk solids for Powder Bed Fusion
… and thermally pre-processed to improve flow and bulk density, creating a total group of twenty-four powder bulk solid candidates for study. Each of the PAEK samples was analysed for Particle Size Distribution (PSD) and morphology, and then the bulk and dynamic properties were measured using a dry …
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The flow of particulate bulk solids in an air-assisted gravity conveyor
… to the air-assisted gravity conveying of bulk particulate solids. Aspects of the behaviour of fluidised powder in stationary beds were studied where it seemed possible that observations of such behaviour might be useful in predicting how the same powder would flow in an air-gravity …
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Development of a test protocol for industry to predict and optimise flow behaviour of blended powders utilising particle to bulk scale models
… in measuring, controlling and/or modifying the bulk flow properties of powders. A recently developed powder flow tester (PFT) by The Wolfson Centre for Bulk Solids Handling Technology, University of Greenwich is now available for industry to measure quickly and accurately the flow behaviour of …
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Analysis of Galvanized Steel Plates Using Glow Discharge-Atomic Emission Spectrometry
… technique for analyzing surfaces, coatings and bulk solids. The purpose of our work is to explore the optimum lamp operation parameters of SA-2000 for analysis of galvanized steel plate and to investigate the method for qualitatively and quantitatively analyzing the zinc coating. Under the …
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Density relaxation of granular matter through Monte Carlo and granular dynamics simulations
… involved with the handling and processing of bulk solids including pharmaceuticals, chemicals, agricultural and mining materials. Despite the enormous importance of these materials in society, their behavior is not well-understood; in fact, there is no known model available that is capable of …
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Stochastic and deterministic dynamics investigation of the microstructure of granular materials
… critical tap intensity which produces a maximum bulk solids fraction. A key result that is found in this thesis is the mechanism responsible for the relaxation phenomenon is an evolving ordered packing structure propagating upwards from the plane floor.
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Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits
… thermal conductance characterization across bulk materials, buried films and interfaces, and nanoscale films. Three variants are developed: Displacement TOPS (D-TOPS) for bulk solids, Immersion TOPS (I-TOPS) for deeply embedded films and interfaces, and High-Resolution TOPS (HR-TOPS) for …
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TDDFT calculations for excitation spectra of solids and superstructures utilizing mGGA
… TDDFT plus mGGA to calculate optical spectra for bulk solids. The result shows good agreement with experimental data. III-V ternary alloys AxB1−xC are promising materials for optoelectronic, high-speed electronic and microwave applications, such as infrared emitting diodes and detectors, high …
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A new constitutive and numerical model for arching of cohesive powders in hoppers
… orifice is a question at the centre of numerous bulk solids handling issues encountered in industry. The work in this thesis contributes towards answering the question by using a combination of empirical powder property determination and numerical simulation. Cohesive arching at the outlet is a …
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Evaluation on an on-site stormwater treatment device for sediment flux mitigation in the Lake Tahoe basin
… Removal efficiency, effluent concentration, and bulk solids removal were assessed for perfomance evaluation. The device demonstrated a median removal efficiency from grab samples of 74%, median total suspended solids effluent concentration of 72 mg/L, and removed 89% of the total solids …
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Predicting storage vessel geometry requirements for discharge of extreme shape materials
… meeting the expectations of the industry, the bulk mechanical/flow properties that make up the feedstock (raw materials) used to generate the biofuels needs to be characterised. The particles that make up biofuels materials (i.e. biomass and waste materials) are extreme/irregular in shape. They …
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Investigations into the segregation of heaps of particulate materials with particular reference to the effects of particle size
… the propensity that a particulate solid bulk material will segregate. In spite of its ubiquity, and economic significance, segregation of bulk solids is a misinterpreted and vaguely understood phenomenon. An extensive literature review has been undertaken to establish different areas …
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Improving performance of discharge equipment for coals with poor handling characteristics
The accepted design techniques for bulk solids handling equipment are frequently overlooked during the installation of industrial process plants. As a result, flow unreliability is often observed in silos in the form of flow stoppages, product bulk density variations, formation of rat-holes, …
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Air slide basic modelling
… from the rheology of powder and the knowledge of bulk particulate characteristics. Previous research, measurement campaigns and extensive literature studies, all point out that in terms of controlling discharge from gravity flow equipment (and after studying the transport behaviour of an air …
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Quantification and mitigation of segregation in the handling of alumina in aluminium production
… influence of the various handling steps on the bulk solids can be identified. Segregation by particle size is the main type of influence, although the work has shown that attrition is another. Standardised statistical expressions have been used for analysing the bottlenecks of the logistic …