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 15 of 15 for “"gas-solid flow"”.
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Optical measurement of ash particle size and velocity in gas-solid flow
… velocity distribution of moving particles in a gas-solid environment. The prototype system consists of a digital image acquisition module and MATLAB RTM image-processing module. Two specific applications were conducted. The first is the measurement of ash particle characteristics during surface …
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NUMERICAL ANALYSIS OF TURBULENT GAS-SOLID FLOWS IN A ROUGH HORIZONTAL CHANNEL USING THE EULERIAN TWO-FLUID MODEL
Turbulent gas-solid flows are encountered in many industrial processes including pneumatic transport of granular materials such as pulverized coal, circulating fluidized beds and dust and particle-exhaust pollution control systems. Modelling the gas-solid flow is a major challenge since the flow is …
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Development of semi-empirical models to measure mass flow rate of solids in an air seeder
… in the 1950s, it still lacks in the area of mass flow measurement of conveyed solids. An effective method of on-line seed flow monitoring is important to reduce product wastage and also, to anticipate plugging in the lines. The goal of this research has therefore been to develop methods to measure …
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Research in CO2 reduction by carbonation
… software suite PHYSICA, for the simulation of gas-solid flow. It has been combined with reaction code and used to simulate a carbonator and a calciner as part of a carbonation cycle for carbon capture in two and three dimensions. Carbon capture technologies show promise and many countries are …
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Study of Fluid Forces and Heat Transfer on Non-spherical Particles in Assembly Using Particle Resolved Simulation
Gas-solid flow is fundamental to many industrial processes. Extensive experimental and numerical studies have been devoted to understand the interphase momentum and heat transfer in these systems. Most of the studies have focused on spherical particle shapes, however, in most natural and industrial …
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The application of laser measurement techniques to the pneumatic transport of fine particles
… intensities is now well established for gas and liquid flows. In these situations, light from a low powered laser is scattered by seeding particles in the fluid which are small enough to follow the flow. The resulting Doppler shift of the scattered light is proportionate to the velocity …
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Wavelet adaptive and predictive control with applications to chemical looping system
… to separate oxygen from nitrogen using solid oxygen carrier to facilitate carbon dioxide capture in the design of next generation clean coal power plants. Application of the available control techniques to this process to guarantee its tight and robust operation and control has not …
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Measurement and Control of Slip-Flow Boundary Conditions at Solid-Gas Interfaces
This thesis describes measurements of the gas-solid flow boundary condition at moderate Knudsen number, i.e., where the dimensions of the flow are similar to the mean free path, and thus partial slip is expected. This regime has become more important with increased focus on nano-scale devices, but …
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Evaporating crossflow sprays in gas-solid flows
Injection of evaporating sprays into gas-solid flows is encountered in many engineering processes such as energy production industry and chemical industry. The phenomenon involves phase change, three-phase interactions, heat and mass transfer. All of these characteristics control the process …
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Gas-solid transport and reaction via intervened evaporating sprays
… to transportation fuels and light olefins. The gas-solid transport with reaction via intervened evaporating sprays in the FCC riser is specially important but complicated, with coupled mechanisms of chemical reaction and heat, momentum and mass transfer among multiple phases (liquid, solid and …
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Development of Diagnostic Tools for Use in a Gas Turbine Engine Undergoing Solid Particulate Ingestion
… systems can be exposed to a variety of solid particulates while operating in either arid or other hazardous environments. For conventional takeoff and landing aircraft, debris can be ingested directly into the gas turbine powerplant which is exposed to the ambient environment. For …
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Modeling of non-uniform hydrodynamics and catalytic reaction in a solids-laden riser
… refinery because of the strong mixing of gas and solids that yields high heat and mass transfer rates, and reaction rates. In a Fluid Catalytic Cracking (FCC) process, the performance of riser reactor is strongly dependent on the interaction between the fluid and catalysts, since the …
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Flow characteristics and phase interactions of evaporating sprays in gas-solid suspensions
… of crude oil in petroleum refinery, coal gasification, fluidized coking to make synthetic crude oil, and condensed mode gas polymerization. The rapid evaporation of spray jets significantly affects the gas-solids mixing, solids concentration, gas/solids temperature and gas/solids velocity …