Taylor Instability
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. DOIS CONCEITOS DE LIBERDADE: 60 ANOS APÓS A SUA PUBLICAÇÃO
Este artigo analisa criticamente o ensaio “Dois conceitos de liberdade”, de Isaiah Berlin. Para isso, compara a primeira edição de 1958 com a edição de 1969 e o ditado oral de 1957, à luz de trabalhos anteriores e posteriores do autor. Abordam-se as críticas ao ensaio, feitas por CrawfordBrough MacPherson, Gerald MacCallum Jr., Charles Taylor e Jam
Rev. bras. Ci. Soc.. Publicado em: 27/06/2019
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2. LIQUID-LIQUID DISPLACEMENT FLOWS IN A HELE-SHAW CELL INCLUDING NON-NEWTONIAN EFFECTS / DESLOCAMENTO DE LÍQUIDOS EM CÉLULA DE HELE-SHAW CONSIDERANDO EFEITOS NÃO NEWTONIANOS
This work studied the displacement of fluids in porous media using a Hele-Shaw cell. Specifically, was investigated experimentally the displacement of a non-Newtonian fluid by a Newtonian in a rectangular Hele-Shaw cell. The Saffman-Taylor or viscous fingering instability occurs when one fluid pushes a more viscous one, and a Hele-Shaw is a convenient tool t
Publicado em: 2010
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3. Simulation, analysis and computational characterization of fingering patterns in fluids displacement on porous media. / Simulação, análise e caracterização computacional de padrões de fingering em deslocamentos de fluidos em meios porosos
In this work, the patterns related to the displacement process of an interface between two ftuids of different mobilities are studied computationally. In the literature, the formation process of these patterns is known as fingering, a type of dynamic instability in the interface between two miscible fluids, where the fingers are classified in two types: dens
Publicado em: 2009
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4. Flow boiling of water in a vertical tube at sub-atmospheric pressures
This paper describes some of the key experimental results and features obtained from a study on upward flow boiling of water in a vertical tube at sub-atmospheric pressures. The experiments were conducted at 250, 500 and 1000 mbar (abs) exit pressures. From the experimental results, several interesting features and effects were observed, namely, heat transfe
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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5. Equatorial F-region irregularities generated by the Rayleigh-Taylor instability mechanism: rocket observations from Brazil
Vários foguetes de sondagem carregando experimentos de diagnóstico de plasma foram lançados dos centros Brasileiros de lançamento de foguetes em Natal (5.9ºS, 35.2ºO Lat. Geog.) e Alcântara (2.31ºS, 44.4ºO Lat. Geog.). Sondas de Langmuir (LP) foram usadas para medir os perfis de densidade e temperatura do plasma e Sondas Capacitivas em Alta Freqüê
Revista Brasileira de Geofísica. Publicado em: 2007
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6. Método semi-lagrangeano das curvas de nível na captura de interfaces móveis em meios porosos / Semi-Lagrangian level set method for capturing moving interfaces in porous media
Em suma, esta tese propõe uma metodologia de acompanhamento de interfaces móveis que baseia-se no método dos conjuntos de nível aqui chamado de método das curvas de nível, uma denominação baseada nas aplicações em que as interfaces são representadas por curvas acoplado a uma implementação semi-Lagrangeana, para problemas em meios porosos. Embora
Publicado em: 2006
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7. Visualization study and quantitative velocity measurements in turbulent taylor-couette flow by phantomm flow tagging: a description of the transition to turbulence
A visualization study and Quantitative velocity measurements have been performed in Taylor-Couette flow with a medium-gap (ç= 0.356), over a large range of Taylor numbers (2.1x10(4) < Ta < 1.1x10(11)), with the outer cylinder fixed and the inner cylinder rotating about its axis. Quantitative velocity measurements were carried out using the PHANTOMM flow tag
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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8. Numerical simulation of the wind action on a long-span bridge deck
A numerical model to study the aerodynamic and aeroelastic bridge deck behavior is presented in this paper. The flow around a rigid fixed bridge cross-section, as well as the flow around the same cross-section with torsional motion, are investigated to obtain the aerodynamic coefficients, the Strouhal number and to determine the critical wind speed originati
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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9. TAYLOR-COUETTE INSTABILITY IN VISCOPLASTIC FLUID FLOW / INSTABILIDADE DE TAYLOR-COUETTE EM ESCOAMENTOS DE FLUIDOS VISCOPLASTICOS
A superposição de um escoamento circular de Couette e um fluxo com gradiente de pressão axial, através de um espaço anular ocorre em muitas aplicações práticas, tais como: reatores químicos catalíticos, filtros, extratores líquido- líquido, mancais e o fluxo de retorno de lamas de perfuração entre a coluna de perfuração rotatória e a formaç
Publicado em: 2002
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10. Nanohydrodynamics simulations: An atomistic view of the Rayleigh–Taylor instability
Nanohydrodynamics simulations, hydrodynamics on the nanometer and nanosecond scale by molecular dynamics simulations for up to 100 million particles, are performed on the latest generation of supercomputers. Such simulations exhibit Rayleigh–Taylor instability, the mixing of a heavy fluid on top of a light in the presence of a gravitational field, initiate
National Academy of Sciences.
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11. A deletion adjacent to the maize transposable element Mu-1 accompanies loss of Adh1 expression.
Insertion of the maize transposable element Mu-1 into the first intron of the alcohol dehydrogenase locus (Adh1) of maize produced mutant Adh1-S3034 with 40% of the wild-type level of protein and mRNA. Continued instability at this locus resulted in secondary mutations with lower levels of protein expression. One of these, Adh1-S3034a, has no detectable ADH1
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12. The Instability of Neurospora Duplication Dp(IL→IR)H4250 , and Its Genetic Control
Previous work (Newmeyer and Taylor 1967) showed that a nontandem duplication, Dp(IL→IR)H4250, is regularly produced by recombination in crosses heterozygous for the effectively terminal pericentric inversion In(IL→IR)H4250. The duplications initially have strongly inhibited growth because they are heterozygous for mating type, which behaves like a vegeta