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 98 for “"Thermodynamic Equilibrium"”.
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Non-Local Thermodynamic Equilibrium in Laser-Sustained Plasmas
… and the existence of a non-local thermodynamic state has been determined. The spectroscopic data consist of several argon neutral and ion line emissions used to spatially resolve electronic energy level population densities in each plasma species. A hydrogen seed in added to the …
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Fundamental limitations on plasma fusion systems not in thermodynamic equilibrium
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Folding-Driven, Nucleation -Elongation Polymerization of Phenylene Ethynylene Imines
… observed to coexist with the monomer in excess. Thermodynamic equilibrium was established by showing that the same distribution was reached starting either from a monomer mixture or from high polymer to which one monomer was added. These results are in great contrast to the low molecular weight …
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Effects of convection and non-equilibrium radiation transfer in stellar atmospheres /
… study the influence of convection and non-local thermodynamic equilibrium (NLTE) on the formation of spectral lines of different chemical elements in the atmospheres of different metallicity main sequence turn-off (MSTO) and red giant branch (RGB) stars. The influence of convection is assessed by …
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The Effect of Shear Flow on Solidification Microstructures
… two boundary conditions, corresponding to local thermodynamic equilibrium and conservation of mass. A three dimensional model of the solidifying interface is constructed, and the velocity, temperature and concentration fields are calculated for a wide range of alloy compositions and process …
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Anomalous Hall effect and persistent valley currents in graphene p-n junctions/
… remain nonzero in the system ground state (in thermodynamic equilibrium). The valley currents can be controlled via the bias and gate voltages, enabling a variety of potentially useful valley transport phenomena.
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ΚΑΤΑΛΥΤΙΚΗ ΔΙΑΣΠΑΣΗ ΥΔΡΟΘΕΙΟΥ ΓΙΑ ΤΗΝ ΠΑΡΑΓΩΓΗ ΥΔΡΟΓΟΝΟΥ ΚΑΙ ΘΕΙΟΥ
EXPERIMENTS FOR THE STUDY ON THE THERMODYNAMIC EQUILIBRIUM OF THE SYSTEM H2S/H2/SI (I=1,...,8) IN THE GAS PHASE HAVE BEEN CARRIED OUT IN AN A-AL2O3 TUBULAR REACTOR IN THE TEMPERATURE RANGE OF 973-1133 K AND PRESSURE RANGE OF 1,3-4,0 ATMA. THE EQUILIBRIUM OF THE SYSTEM HAS BEEN STUDIED THEORETICALLY …
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In Situ X-Ray Investigations of Staging and Sequencing In Potassium-Graphite Intercalation Compounds
… 2, stage mixing is shown to occur in thermodynamic equilibrium. The amount and relative concentration of admixed stages is seen to be a continuous function of the thermodynamic parameters. However, the transition between stage n and stage n+1 still exhibits a discontinuity which can be …
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Some structural theorems for inelastic solids : an internal variable approach.
The theory of inelastic solids involving thermodynamic potential functions with internal variables is reviewed. Use is made of the condition for stable thermodynamic equilibrium in order to obtain dual minimum principles for the equilibrium state of a solid inelastic body. This leads to dual forms …
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Orthogonal Transformations of the Onsager Phenomenological Equations and Minimum Entropy Production
Equilibrium thermodynamics is a phenomenological theory of matter, and, as such, it makes no assumptions regarding the structure of matter. Rather, based on three general laws of nature (the three laws of thermodynamics), the science of equilibrium thermodynamics seeks to correlate many of the …
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Modeling of non-equilibrium plasmas in an inductively coupled plasma facility
… parametric investigation of thermo-chemical non-equilibrium effects on the plasma jet at different operating pressures ranging from 3 to 15 kPa. The test gas is an ionized air mixture represented by eleven species. The induced electric field inside the torch is computed by solving Helmholtz …
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Poisson representation methods for stochastic models of chemical reactions
… chemical reaction systems whose steady state is thermodynamic equilibrium. The solutions for such systems are discussed from grand canonical and canonical ensemble points of view. Basic formulae for the two time correlation functions are derived using the Poisson representation method. The …
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Mechanoluminescence and Sonoluminescence From Acoustic Cavitation
… pressure the molecular emission bands indicated thermodynamic equilibrium with rotational and vibrational temperatures of ∼5,800 K. By analyzing the spectral profile of the molecular emission bands it was determined that at very low concentration the emitting molecular species were excited by …
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Mechanochemical transformations: Bridging the gap between global and local kinetics
… to drive physical and chemical systems far from thermodynamic equilibrium, which can eventually result in a broad range of unexpected outcomes.
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Supercritical Water Gasification of Biomass
… three different modeling approaches for SCWG. In thermodynamic equilibrium modeling, a two-phase thermodynamic equilibrium model was built, enabling to predict products composition as a function of process parameters, as well as solids formation at equilibrium. Energy balances were also performed …
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Deterministic and stochastic modelling of a catalytic surface reaction
… for the study of pattern formation far from thermodynamic equilibrium. A reaction that has been investigated extensively in experiments is the oxidation of carbon monoxide on platinum.In the present work we first develop a mathematical model for CO oxidation on Pt which is valid over a wide …
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In situ x-ray investigations of staging and sequencing potassium-graphite intercalation compounds
… n, n > 2, stage mixing is shown to occur in thermodynamic equilibrium. The amount and relative concentration of admixed stages is seen to be a continuous function of the thermodynamic parameters. Hm~ever, the transition between stage n an~ stage n+l still exhibits a discontinuity which can be …
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Computational Fluid Dynamics Modeling of Compact Steam Generators
… Volume of Fluid (VOF) model and the Two-Phase Thermodynamic Equilibrium (TPTE) model—are applied to simulate both adiabatic and heat transfer conditions within mini-channels. The simulations are validated against experimental data from two sources: an R-134a-based vertical test loop developed …
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Perturbed equilibria of myosin binding in airway smooth muscle and its implications in airway hyperresponsiveness and asthma
… steady-state, not the static mechanical equilibrium that had been previously assumed. This dynamic steady state requires as an essential feature a continuous supply of external mechanical energy (derived from tidal lung inflations) that act to perturb the interactions of myosin with …
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