Theory Of Convection
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. CONDIÇÕES ATMOSFÉRICAS CONDUCENTES À OCORRÊNCIA DE TEMPESTADES CONVECTIVAS SEVERAS NA AMÉRICA DO SUL / ATMOSPHERIC CONDITIONS CONDUCIVE TO THE OCCURRENCE OF SEVERE CONVECTIVE STORMS IN SOUTH AMERICA
Neste trabalho é realizada uma investigação dos ambientes favoráveis ao desenvolvimento de convecção severa nos subtrópicos da América do Sul (AS) à leste dos Andes. Sondagens de ar superior das 00Z e 12Z de seis estações distribuídas na região subtropical da AS (quais sejam: Porto Alegre/BRA, Florianópolis/BRA, Curitiba/BRA, Foz do Iguaçu/BRA
Publicado em: 2011
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2. Evolução da excentricidade dos sistemas binários com componente evoluída
On this study we have revisited the predicted tidal circularization theory in close binary systems with a evolved component. Close binaries suffer tidal interactions that tend to synchronize periods and circularize the orbits (Zahn 1977, 1989, 1992). According to Zahns theory we compute the integral that give us the variation of the eccentricity in a binary
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/12/2010
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3. Fracionamento de surfactina em coluna de bolhas e espuma / Fractionation of surfactin on a bubble and foam column
Foam fractionation of biosurfactant surfactin solutions obtained from fermentation with Bacillus subtilis bacteria was experimentally studied. A bubble and foam column system was mounted and operated in a semi-batch mode aiming at to optimize the concentration enrichment and the recovery of the bioproduct. The process involves the injection of gaseous nitrog
Publicado em: 2010
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4. Non-universal interspecific allometric scaling of metabolism
We extend a previously theory for the interspecific allometric scaling developed in a d+1-dimensional space of metabolic states. The time, which is characteristic of all biological processes, is included as an extra dimension to d biological lengths. The different metabolic rates, such as basal (BMR) and maximum (MMR), are described by supposing that the bio
Brazilian Journal of Physics. Publicado em: 2009-12
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5. Estudo comparativo entre teoria construtal e entrânsia para casos de resfriamento de fontes de calor em cavidade / Comparactive study between constructal theory end the entransy treory for the cooling cases of heat sources in a cavity
In the present work the cooling was treated by natural convection of one, three and five sources localized in a vertical wall of a rectangular cavity. One has approximated numerically the temperature field in the stationary state at different positions for each case. The conductivity and the dissipation of entransy were evaluated in all these cases and their
Publicado em: 2009
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6. Définition et implémentation des corrections instrumentales de la mission spatiale CoRoT
CoRoT (Convection, Rotation and planetary Transits) is a space mission conceived to the stellar seismology and the search of extra solar planets. Both scientific programs are based on very high precision photometry and require long and uninterrupted observations. For the study of the stellar oscillations, the instrument must be able to measure periodic varia
Publicado em: 2007
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7. Modelagem do balanço de energia do dossel da cultura do pimentão em casa de vegetação. / Canopy energy balance modeling of sweet pepper cultivated in greenhouse.
In a greenhouse production system, the canopy of culture is the main element that modifies the internal microclimate. Its comprehension is very important to understand the energy exchange process. Due to the complexity interaction among several elements, the modeling represents an important tool for research in protected environments, but little used in Braz
Publicado em: 2005
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8. Análise das características dos relâmpagos na região sudeste do Brasil / Lightning characteristics in southeastern Brazil
The first climatological studies of cloud-to-ground (CG) lightning flashes characteristics in Brazil were published at the middle of 90. However, at that time, the lightning detection network used to be composed by only a few sensors, which restricted the analyses to some specific regions. In the beginning of this decade, new studies were published using lig
Publicado em: 2005
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9. Desenvolvimento e avaliação de um metodo semi-continuo de fusão zonal e sua aplicação na recuperação de indio / Development and evaluation of a semi-continuous zone melting method and its application on indium recovery
The zone refining process consists of the movement of one or more melted zones along the bar of the material which purification is desired. This purification process presents as variables: solidification rate, thermal gradient in front of the solid/liquid interface, convection imposed to the liquid and relative size of melted zone. The present work aims to i
Publicado em: 1997
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10. An equilibrium statistical model for the spreading phase of open-ocean convection
A “most probable state” equilibrium statistical theory for random distributions of hetons in a closed basin is developed here in the context of two-layer quasigeostrophic models for the spreading phase of open-ocean convection. The theory depends only on bulk conserved quantities such as energy, circulation, and the range of values of potential vorticity
The National Academy of Sciences.
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11. Stationary convection in dilute solutions of 3He in superfluid 4He
Two symmetric, convecting steady states have been observed in a novel cell of unity aspect ratio and studied over a range of temperature for two concentrations of 3He in superfluid 4He. An existing theory due to Parshin has been related to the conditions necessary for convection in this system, defining a Rayleigh number closely analogous to that of a classi
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12. Boundary Layer Resistance and Temperature Distribution on Still and Flapping Leaves: I. Theory and Laboratory Experiments 1
If the evaporation is uniform on a flat exposed leaf, forced convection will also be nearly uniform, and the leaf temperature will vary with the square root of the distance from the leading edge. Then the resistance expressed in terms of the proper, i.e., average, temperature has the same value as the resistance of a leaf at uniform temperature. Compared to