Transport And Kinetic Theory
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Development of an Acquisition System and Data Analysis for Measurements of Electron Transport Parameters in Gases / Desenvolvimento de sistema de aquisição e tratamento de dados para medidas de parâmetros de transporte de elétrons em gases
This thesis describes a pulsed Townsend experiment whose purpose was to obtain experimentally the transport parameters of electron in gases, particularly nitrogen and isobutane, within a range of reduced electric field between 130 Td and 210 Td. The transport parameters obtained were the average speed of center of mass of the electron cloud, the ionization r
Publicado em: 2010
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2. Kinetic theory of Hamiltonian maps / Teoria cinética de mapas hamiltonianos
This work consists in the study of the transport properties of chaotic Hamiltonian systems by using projection operator techniques. Such systems can exhibit deterministic diffusion and display an approach to equilibrium. We show that this diffusive behavior can be viewd as a spectral property of the associated Perron-Frobenius operator. In particular, the le
Publicado em: 2007
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3. Atomistic simulation for difusion mechanisms investigation : self diffusion coeficient of simples gases in polymeric matrix / Simulação atomistica como ferramenta para investigação dos mecanismos de difusão : coeficientes de autodifusão de gases simples em matriz polimerica
In this thesis a study of the predictive potential of the molecular dynamic simulation was performed for transport properties of light gases in polyimide matrix. From de practical point of view permeability is the property of most interest, and involves kinetics as well as thermodynamics properties, diffusion coefficient and solubility of the penetrants mole
Publicado em: 2006
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4. Physics of transport barriers
The concept of ExB flow velocity shear suppression is utterly fundamental in modern fusion research. It is asserted that there are models enabling to understand the physics involved in LH transitions. To improve the understanding of the mechanisms leading to the formation of Transport Barriers, especially the relation between Internal and Edge barriers it is
Brazilian Journal of Physics. Publicado em: 2004-12
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5. Efeitos de temperatura e de interação finita em sistemas desordenados correlacionados
The main goal of this work is to study the role of disorder in strongly correlated systems, where the electron-electron interaction is comparable to or dominates over the electron kinetic energy. Keeping this in mind, we solve the Hubbard model and the Anderson lattice model in the presence of disorder. The main theory in which our work is based is the Dynam
Publicado em: 2003
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6. Implementação de modelo de fechamento em risers de FCC atraves de codigo comercial CFD
This work concerns in a study about a gas-solid flow (the gas mixture is air; the solid is catalyst particles) in the FCC riser. The riser is treated like a pipe without axis symmetry. This treatment allows the visualization of some of mass and momentum transfer phenomena through the center of pipe that cannot be predicted in a axisymmetrical approach. The g
Publicado em: 2001
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7. Fluid dynamic modelling and simulation of circulating fluidized bed reactors: importance of the interface turbulence transfer
The main objective of this work is to analyze the importance of the gas-solid interface transfer of the kinetic energy of the turbulent motion on the accuracy of prediction of the fluid dynamic of Circulating Fluidized Bed (CFB) reactors. CFB reactors are used in a variety of industrial applications related to combustion, incineration and catalytic cracking.
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001
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8. Modelagem fenomenologica e simulação bidimensional da fluidodinamica de reatores de leito fluidizado circulante
Circulating Fluidized Bed (CFB) reactors are used in a variety of industrial applications especially related to combustion and catalytic cracking. The fluid dynamic prediction of CFB is fundamental in its development and optimisation. In this work, a computer code for the simulation of the fluid dynamics of Circulating Fluidized Bed Reactors was developed. T
Publicado em: 1998
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9. Kinetic theory of quantum ideal gases. / Teoria cinética dos gases ideias quânticos.
The aim of this work is the determination of the coefficients of shear viscosity and thermal conductivity of quantum ideal gases. In the calculation of the transport coefficients two aspects have been taken into account: a classical statistical with quantum cross-sections and a quantum statistical with quantum cross-sections. In the first case, an alternativ
Publicado em: 1993
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10. Evolução temporal de excitações elementares em semicondutores fortemente fotoexcitados
We present a method that using a first principle theory allow us for the determination of nonlinear transport equations which describe irreversible processes in far from equilibrium systems. This method is applied to study the nonequilibrium thermodynamics and kinetics of evolution of relaxation processes in polar semiconductors under high levels of optical
Publicado em: 1982
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11. Contribution of electrogenic ion transport to impedance of the algae Valonia utricularis and artificial membranes.
The cell membrane of Valonia utricularis contains an electrogenic carrier system for chloride (Wang et al., Biophys J. 59:235-248 (1991)). The electrical impedance of V. utricularis was measured in the frequency range between 1 Hz and 50 kHz. The analysis of the impedance spectra from V. utricularis and its comparison with equivalent circuit models showed th
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12. Interaction of Galactosaminoglycan with Neurospora Conidia
The inactivation of Neurospora crassa conidia by galactosaminoglycan isolated from cultures of this organism was followed by measuring colony-forming ability and ability to take up radiolabeled metabolites. When kinetic data on the loss of transport function and on killing were analyzed by use of target theory, it appeared that few “hits” are required fo