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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 81 for “"Particle Density"”.
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Metal sludge thickening characteristics: particle density considerations
… modification of this equation that would predict particle settling behavior in concentrated suspensions such as sludges. During the 1960’s, researchers such as Michaels and Bolger (1962) and Javaheri and Dick (1969) developed an index of the relative amount of water associated with a floc particle …
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Laser Interferometer Measurements of Particle Density Profiles in Electric Shock Tubes
Made available in DSpace on 2014-12-08T22:24:16Z (GMT). No. of bitstreams: 1 6801760.pdf: 2209323 bytes, checksum: fa147d95ba67769ec7ddba164295ea96 (MD5) Previous issue date: 1967
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The relation of bed depth, particle density, and particle size to the local coefficients of heat transfer of internally-heated fluidized beds of solids
… coefficients of heat transfer with bed depth, particle density, and particle size were studied using a pyrex pipe four inches in diameter as the fluidizing vessel. The fluidized solids investigated were aerocat cracking catalyst, having a geometric-mean particle diameter of 0.00262 inch and an …
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The potential of QEMSCAN in predicting coal washability of Mpumalanga coals
… lengthy. QEMSCAN has the ability to characterise particle density based on the mineralogical composition of the particle. The objective of this research is to determine if QEMSCAN is a viable alternative to float and sink analysis. Float and sink analysis typically requires coarse size fractions …
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Cooperative Behavior in Driven Lattice Systems with Shifted Periodic Boundary Conditions
… boundary conditions. The systems consist of particle and holes which move by exchanges of nearest neighbor particle-hole pairs. These exchanges are controlled by the energetics associated with an internal Hamiltonian, an external drive and a stochastic coupling to a heat reservoir. The effect …
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Electronica Devices and Interface Strategies for Nanotechnology
… dependency of the film morphology on the pattern density is observed which potentially could be exploited to provide wafer-scale morphology tuning with only a single evaporation. Next, electrical characterization of gold nanocrystal capacitors showed significant increases in the flat band voltage …
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A novel state-space based method for direct numerical simulation of particle-laden turbulent flows
… numerical method for evolution of the particle density function, that describes particle-laden flows. The problem is stated purely in a deterministic Eulerian framework. The method is coupled to an incompressible three-dimensional Navier-Stokes solver. We focus on dilute suspensions …
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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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The effects of crystal seeding on the handling characteristics of nickel hydroxide sludge
… sludge and to investigate the changes in sludge particle properties that mediated any changes in those characteristics. A continuous-flow nickel hydroxide precipitation reactor was operated with and without solids recycle to produce sludge for analysis. The concentration of solids produced in the …
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Cosmology of hidden sector with Higgs portal
… field. We particularly focus on their relic particle density as a candidate for dark matter. For the case of hidden sector without a gauge field we have improved the accuracy of the bounds on the coupling constant and give bounds on the Lagrangian parameters. Models with Abelian and …
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Applications of Field Theory to Reaction Diffusion Models and Driven Diffusive Systems
… In the second project, we focus on a simple particle transport model far from equilibrium, namely, the totally asymmetric simple exclusion process (TASEP). While its stationary properties are well studied, many of its dynamic features remain unexplored. Here, we focus on the power spectrum of …
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Controlling non-equilibrium dynamics in lattice gas models
… perpendicular or parallel to the external particle drive and resulting net current. For perpendicular orientation of the temperature boundaries, in the hotter region, the system behaves like the (totally) asymmetric exclusion processes (TASEP), and experiences particle blockage in front of …
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Chemical and Physical Studies of Secondary Organic Aerosol Formed from Beta-pinene Photooxidation
… The main objective was to identify the gas and particle phase products with an atmospheric pressure chemical ionization mass spectrometer (APCI-MS/MS). A wide variety of products were identified containing various functional groups including alcohol, aldehyde, carboxylic acid, ketone and …
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HYDRODYNAMIC CHARACTERISTICS AND COAL COMBUSTION MODELING OF A HIGH VELOCITY FLUIDIZED BED (SOLIDS FRICTION FACTOR, TWO PHASE FLOW, PRESSURE PROFILE, FAST)
… due to the use of fine dolomite or limestone particles. This process can also be used for the smelting of mineral ores. However, the LFB concept is relatively new and data in the literature are scarce.</p><p>In this study a bench scale loop fluidized bed has been designed, fabricated and …
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Efficient Numeric Computation of a Phase Diagram in Biased Diffusion of Two Species
… gas with equal numbers of oppositely charged particles, diffusing under the influence of a uniform electric field and an excluded volume condition undergoes an order-disorder phase transition, controlled by the particle density and the field strength. This transition may be continuous (second …
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Theory of Alpha-Nucleus Collisions at High Energies
<p>The interaction of high energy alpha particles with atomic nuclei is considered using multiple scattering theories. Semi-classical solutions to coupled-channel equations derived from Watson's form of the nucleus-nucleus multiple scattering series are shown to be equivalent to the Glauber …
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Development of a Hybrid Particle Continuum Solver
… situations that exhibit large fluctuations in particle density such as: planetary reentry, ablation due to arcing, rocket exhaust plumes, etc. When simulating these events, a high level of physical accuracy can be achieved with kinetic methods otherwise known as particle methods. However, this …
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The quark-hadron transition and hot hadronic matter in the early universe
… for the bagged quark and the hadron phase. A particle density evolution model is introduced which predicts the temperature at which particle species drop out of equilibrium (freeze-out) in an expanding universe. We then construct dynamical evolution equations to describe the reactions of …
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A study of tau identification with the CMS detector at the LHC
… Collider (LHC) at CERN. The two components of particle identification, efficiencies of [tau] identification from generator level information, along with fake rates of the current default algorithm have been determined and analyzed for a photon plus jets background sample and QCD background …
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Floc density measurement and the effects of microproperty variations on sludge dewatering characteristics
… as having a three-tiered structure: (1) primary particles, (2) floc particles, and (3) aggregate particles. To investigate sludge structure in relation to sludge dewatering, this study has defined sludge structure using several sludge particle micro properties. A laboratory technique …
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