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 66 for “"ideal gas"”.
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Effects of a Computer-based Simulation on Chemistry Self-Efficacy
… construct a new self-efficacy scale specific to ideal gas laws since such a scale does not exist in the field. Many scales used to assess self- efficacy beliefs are too broad, and aren’t as useful in informing us about feelings of self- efficacy in a particular domain (Bandura, 2006). …
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A Numerical Study of Nonspherical Black Hole Accretion
… computer code for calculating fully relativistic ideal gas hydrodynamics around a Kerr black hole. The aim is to study fully dynamic inviscid fluid accretion onto black holes, as well as to study the evolution and development of nonlinear instabilities in pressure supported accretion disks.
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Bose-Einstein condensation of excitons in uniaxially stressed Cu2O
… in Cu20 have been demonstrated to be a nearly ideal gas of bosons, providing a unique system for studying Bose-Einstein statistics and Bose-Einstein Condensation of an ideal gas in the laboratory. In this study, I have applied uniaxial stress to optimize the conditions for a Bose-Einstein …
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Pressure-temperature boundaries for ideal dissociating and ionizing gases
… of determining thermodynamic properties of gaseous systems in which real-gas effects must be considered can be greatly simplified through use of existing ideal-gas theories for the processes of dissociation and ionization. Since, however, the ideal dissociating gas theory neglects ionization …
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Bose-Einstein condensation of excitons in uniaxially stressed cuprous oxide
… Cu$\sb2$O have been demonstrated to be a nearly ideal gas of bosons, providing a unique system for studying Bose-Einstein statistics and Bose-Einstein Condensation of an ideal gas in the laboratory. In this study, I have applied uniaxial stress to optimize the conditions for a Bose-Einstein …
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Designing Better Scaffolding in Teaching Complex Systems with Graphical Simulations
… as the research platform to teach the ideal gas law as a system. The ideal gas law is an emergent chemical system that has three levels: (1) experiential macro level (EM)(e.g., an aerosol can explodes when it is thrown into the fire); (2) abstract macro level (AM) (i.e., the …
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Using Simulink to Develop a One-Dimensional, Two-Phase Fluid Model
… momentum, and energy balance for each fluid--an ideal gas and an incompressible liquid. The simulation may model a straight pipe section, or a pipe section that involves a cross-sectional area change. Rough models of interphase heat transfer and interphase friction are included. Currently, phase …
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Computational Exploration of Thermodynamic Models of Geological CO₂ Injection
… flow characteristics, in comparison to the Ideal Gas Equation of State. Through a series of coupled pipe-reservoir simulations, we assess variations in pressure and density as CO₂ is injected from the pipe into the porous medium. The model can detect phase change conditions, allowing us to …
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Modeling and Simulation of High-Density Spray Combustion
… phenomena, the equation of state for the gas phase and cost-effective chemical kinetic modeling. Fuel injected as liquid must break up into droplets, evaporate, and mix with air before combusting. Models for these processes have been developed and need to be tested against experiments. As …
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High speed plasma flow about probes
… a compressible inviscid, electrically conducting ideal gas flow past a blunt body is presented. An experiment using a double diaphragm shock tube to produce a slug of gas with high electrical conductivity is performed to confirm the theoretical results. The theoretical problem is considered in two …
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High speed plasma flow about probes
… a compressible inviscid, electrically conducting ideal gas flow past a blunt body is presented. An experiment using a double diaphragm shock tube to produce a slug of gas with high electrical conductivity is performed to confirm the theoretical results. The theoretical problem is considered in two …
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Solid-Supercritical Fluid Equilibrium: Experimental and Theoretical Studies of Partial Molar Volumes and Solubilities
… carbon dioxide indicated strong and highly nonideal solvent-solute interactions. Observed solubilities were a factor of 10('3)-10('8) of that predicted using only the ideal gas law. The data were used to develop a simple, semi-empirical solid-super-critical fluid solubility correlation which …
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The development of a proff of principle superfluid Joule-Thomson refrigerator for cooling below 1 Kelvin
… 4He as the working fluid and depends on the non-ideal-gas-like behavior of the 3He component in this mixture to provide cooling when the mixture is throttled. This work included the design and development of low dissipation valves and a low temperature compressor that were successfully operated …
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Insulator-insulator Contact Charging As A Function Of Pressure
… A two-phase equilibrium model based on an ideal gas of singly charged ions in equilibrium with a submonolayer adsorbed film was developed to describe the pressure dependence of the surface charge on an insulator. The resulting charge density equation is an electrostatic version of the …
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Compressible flows of dense gases in boundary layers
… and numerics necessary for the analysis of dense-gas boundary-layer flows over arbitrarily shaped two-dimensional bodies are developed. The governing equations are derived from the Navier-Stokes-Fourier equations for a general fluid. A numerical method based on the second-order Davis-coupled …
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UNDERSTANDING AND MODELING THE SORPTION ON ANION EXCHANGE RESINS USING POLY-PARAMETER LINEAR FREE-ENERGY RELATIONSHIPS AND PHASE CONVERSION
… the feasibility of phase conversion (e.g., an ideal gas phase as the reference state) for ionic species was examined. To develop the model, a training set of isotherms was obtained using aliphatic and aromatic carboxylates, phenols, anilines, nitrobenzene, and ibuprofen. These compounds were …
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Sonoelectrochemical (20 khz) production of hydrogen from aqueous solutions
… any electrolytic system and mechanically removes gas bubbles on the electrode surface. This work takes this previous research further by quantifying actual hydrogen gas output. The hydrogen evolution reaction was then directly compared with that calculated using the Ideal Gas Equation to quantify …
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Tuneable homogeneous Bose fluids close to and far from equilibrium
… with an ultracold weakly interacting Bose gas of 39 K in a 3- dimensional homogeneous optical trap. We expound three phenomena in different regimes from adiabatic equilibrium to ‘true’ far-from-equilibrium. We first outline a cooling effect driven by three-body recombination, which has …
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Quantum Transport and Scale Invariance in Expanding Fermi Gases
… hydrodynamic expansion of a two-component Fermi gas near a broad collisional (Feshbach) resonance. This expansion also provides a precise test of scale invariance and an examination of local thermal equilibrium as a function of interaction strength. After release from an anisotropic optical trap, …
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Quantum saturation and condensation of excitons in copper (I) oxide
… and Bose-Einstein condensation of this nearly ideal gas. We model the time dependence of this bosonic system including exciton decay mechanisms, energy exchange with phonons, and interconversion between ortho (triplet-state) and para (singlet-state) excitons, using parameters for the excitonic …
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