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 24 for “"Dense phase"”.
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Dense-phase pneumatic transport of cohesionless solids
… to gain a more fundamental understanding of dense-phase pneumatic transport of cohesionless solids. A 50.8 mm internal diameter circulating unit with both horizontal and vertical sections has been constructed . The pipe material is transparent lexan which allows for visual observation of the …
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The dense phase hydraulic transport of high concentration cyclone classified tailings in pipelines
Summary in English. Word processed copy. Includes bibliography.
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Bubble Dynamics and Dense Phase Composition in 2-D Binary Gas-Solid Fluidized Bed
… bed was used to study bubble dynamics and dense phase composition distribution in order to gain some fundamental understanding of this system. Digital image analysis (DIA) was employed to measure bubble diameter, bubble rise velocity, bed expansion and particle composition distribution. …
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Effects of combined high hydrostatic pressure and dense phase carbon dioxide treatments on inactivation of enzymes, microorganisms and sensory properties of different products
… of combined High Hydrostatic Pressure (HHP) and Dense- Phase Carbon Dioxide (DPCD) treatment on inactivation of fruit enzymes: peroxidase (POD), polyphenoloxidase (PPO) and pectinmethylesterase (PME) of feijoa, inactivation of microorganisms in their growth media and sensory properties of treated …
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The influence of bulk particulate properties on pneumatic conveying performance
Interest in the use of dense phase conveying has grown considerably in recent years. However, not all products are capable of being conveyed in dense phase and it is often difficult to predict which products have dense phase capability without carrying out pilot conveying trials. The main objective …
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Bubble Induced Heat Transfer in Two-Phase Systems
The two-phase theory of fluidization has been extended to cover heat transfer at surfaces by introducing the concept of a property boundary layer in the vicinity of the surface. The property boundary layer is a consequence of changed voidage and hence of changed thermophysical properties of the …
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Transport mechanisms and modeling of riser reactor
… the important reaction characteristics in the dense-phase transport regime of riser reactors but also misinterpret the kinetic properties via ad hoc adjustments. It is noted that the modeling of hydrodynamics in riser flows has major flaws in its predictability of phase transport in both …
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Dynamic behavior of unsteady turbulent motion in pipe flows of dense gas-solid suspensions
Unsteady stratified motions in dense gas-solid suspension in horizontal pipe flows at low velocities have been observed, but the means for predicting these motions are lacking. For a dense suspension, the effects of particle-particle interaction, the damping of fluid motion by particles and the …
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Collective dynamics in lattice models far from equilibrium
… rate. Finally, we analyse motility-induced phase coexistence in a lattice model of self-propelled particles. We compare two-dimensional systems where the dense phase has both slab and droplet geometries. In the slab geometry, we measure the spectrum of the height profile of the liquid-vapour …
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Improvement of Fluidization Ability for Group A Powders by Fine Powder Additives
… velocity (Umf), bed expansion ratio (BER), and dense phase expansion ratio (DER) are tested to evaluate the quality of fluidization. Coal-15 can slightly improve the fluidization quality. High content of GB-6 can make the mixture obtain some characteristics of Group C/A powders. While after …
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In-line powder flow behaviour measured using electrostatic technology
… density modes: The first being powders in lean phase flow, generated by free-fall of the powder from the outlet of a screw-feeder. The second being dense phase flow, through either 19.1 mm Ii.Dd. stainless-steel pipe or at the outlet of a tablet-press hopper. Powders were selected from a range …
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A pneumatic conveying powder delivery system for continuously heterogeneous material deposition in solid freeform fabrication
… material compositions. This thesis explores a dense phase pneumatic conveying system that has the potential to deliver the powder in a controlled manner and allow for adjustment of material composition throughout the layer.
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Understanding and designing complex architectures of biomolecular condensates
… condensates emerge when a homogeneous liquid phase separates into the condensate and a dilute phase. Condensates in cells function as membrane-less organelles and perform a variety of (temporary) functions. They may also be involved with pathological processes, like the progression of …
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Cold heavy oil production using CO2-EOR technique.
… to CO2-EOR is a tie-back via long distance CO2 dense phase transportation from onshore to offshore. 2. Cold heavy oil production (CHOP) using CO2-EOR technique - Based on conditions investigated, miscible displacement was found to be more efficient for deepwater production. However, immiscible …
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The rheology and flow behaviour of high concentration mineral slurries
… - corrects the measured data for effective slip. Dense-Phase Model - based on the sliding friction between solid particles and the tube wall. Wall Effect - based on a reduction of in situ concentration due to a wall effect. Boundary-Layer Effect - corrects for the effect of a boundary-layer of …
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The range of applicability of models for the flow of high concentration backfill slurries in pipelines
… slurries. These models are the Cooke model for dense phase flow of cyclone classified tailings and the Paterson model for stabilised flow of high concentration full plant tailings. These two materials (cyclone classified tailings and full plant tailings) form the extremes, in terms of particle …
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Characterization of Coacervate Systems Using Redox Sensitive Dyes
… equilibrium occurs in the sample with two phases present in the solution. The two phases are described as the dense phase and the lean phase, named after the amount of polyelectrolyte material in each phase. Coacervates have been topics of interest to researchers in a variety of fields …
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The Phase Behavior of Ubqln Proteins and Implications for Protein Quality Control
… granules in cells and undergoes liquid-liquid phase separation (LLPS) in vitro. LLPS is a biophysical process by which proteins separate themselves from the surrounding aqueous solution by forming protein-rich droplets. The overarching goals of this work are to understand how the UBQLN family …
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Gas fluidization of nanoparticles
… and the strong solid particle collisions in the dense phase suspension. A mathematic model of this phenomenon has been successfully developed and solved numerically.
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Heterogeneous flow structure and gas-solid transport of riser
… and energy dissipation (F), especially in dense and acceleration region, has been reached, Based on these understandings, a mechanistic riser hydrodynamic model was developed on the basis of gas-solid continuity and momentum equations, along with the better formulated drag force correlation …
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