Buoyancy
Mostrando 1-12 de 65 artigos, teses e dissertações.
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1. Analysis of physical mechanisms of human body instability for the definition of hazard zones present in emergency action plans of dams. Case study: Santa Helena Dam, Bahia
RESUMO Os impactos produzidos pelas ondas de cheias decorrentes de ruptura de barragens geralmente causam danos irreversíveis à população residente e a perda do equilíbrio do corpo nas inundações contribui para o agravamento desse cenário. Nesse contexto, esse trabalho teve como objetivo analisar a influência da consideração dos mecanismos físico
RBRH. Publicado em: 07/10/2019
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2. Factors driving seed dispersal in a Neotropical river-floodplain system
ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an e
Acta Bot. Bras.. Publicado em: 18/07/2019
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3. Plumas em escoamento uniforme com estratificação de duas camadas
RESUMO Plumas ocorrem quando um fluido é descarregado em outro fluido com densidade diferente, como poluentes na atmosfera. Neste trabalho, desenvolveu-se um estudo experimental em um tanque de água e modelagem matemática usando a abordagem integral com o intuito de investigar o escoamento gerado por plumas salinas em escoamento uniforme e com estratifica
Eng. Sanit. Ambient.. Publicado em: 08/04/2019
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4. A problem regarding buoyancy of simple figures suitable for Problem-Based Learning
A machine can make three-dimensional figures that can float on different types of liquids, using for each figure always the same quantity of mass. The machine had already made spheres when the engineers intended to design other figures that reached the same depth below the surface. They tested with cubes and realized that regardless of the liquid on which fi
Rev. Bras. Ensino Fís.. Publicado em: 08/06/2017
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5. The Use of an Atmospheric Model to Simulate the Rocket Exhaust Effluents Transport and Dispersion for the Centro de Lançamento de Alcântara
ABSTRACT: This paper introduces a new approach to represent the rocket exhaust effluents into an atmospheric dispersion model considering the trajectory and variable burning rates of a Satellite Vehicle Launcher, taking into account the buoyancy of the exhausted gases. It presents a simulation for a Satellite Vehicle Launcher flight at 12:00Z in a typical da
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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6. Análisis numérico del ámbito de validez del modelo convencional de tiro oblicuo
In a diagnosis survey about ballistics, given to a group of undergraduate students, a high percentage of wrong answers was obtained about estimates of air resistance and other phenomena affecting the movement of a projectile. These mistakes are related to a simplified model widely used in textbooks as well as in lectures. This model assumes that the variatio
Rev. Bras. Ensino Fís.. Publicado em: 10/05/2016
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7. Observational Study of the Surface Layer at an Ocean-Land Transition Region
ABSTRACT: High-frequency measurements of wind, and temperature were made during the dry season of 2008 to study the development of an internal boundary layer at the main Brazilian space launching centre, Centro de Lançamento de Alcântara at Alcântara, Maranhão, Brazil. Turbulence measurements taken at the coast, in two different points 227 m apart show d
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
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8. Arthur Lessac: um ensaio sobre as energias corporais no treinamento do ator
RESUMO Este artigo reflete sobre os quatro estados de energia corporal desenvolvidos por Arthur Lessac: Buoyancy, Radiancy, Potency e Inter-Involvement e sobre a sua utilização no treinamento do ator. Através da análise descritiva de três explorações feitas a partir da abordagem de Lessac, procura-se indicar como a aplicação das energias corporais v
Rev. Bras. Estud. Presença. Publicado em: 2013-08
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9. Wall effects on the cross-buoyancy around a square cylinder in the steady regime
The effects of blockage ratio on the combined free and forced convection from a long heated square obstacle confined in a horizontal channel are investigated in this work. The numerical computations are performed in the steady regime for Reynolds number = 1 - 30, Richardson number = 0 - 1 for blockage ratios of 0.125 and 0.25 for the fixed Prandtl number of
Brazilian Journal of Chemical Engineering. Publicado em: 2012-06
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10. Simple model for CO2 absorption in a bubbling water column
A simple analytical model is presented for the time-evolution of dissolved CO2 concentration in a batch water column. The application in mind is the removal of the CO2 produced by the propulsion plant of a submarine cruising underwater. The model is based on a constant number of constant size CO2 bubbles within the water column, with uniform gas injection th
Brazilian Journal of Chemical Engineering. Publicado em: 2012-03
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11. Dinâmica tridimensional de risers. / Tridimensional dynamics of risers.
Used in offshore oil exploitation risers are elements that connect the floating unit to the oil well on the seabed. They are exposed to the environmental conditions of the site where they are installed. Normally, the risers global behavior is divided in static and dynamic analyses. The static loads acting on the pipe are: weight, buoyancy and current load. T
Publicado em: 2010
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12. Estudo da advecção horizontal de CO2 em florestas na Amazônia e sua influência no balanço de Carbono
Fluxos horizontais e verticais de CO2 foram feitos na floresta tropical na Amazônia dentro da Reserva de Floresta Nacional do Tapajós (FLONA-Tapajós - 54˚58‟W, 2˚51‟S). Duas campanhas de medidas observacionais foram conduzidas em 2003 e 2004 para descrever o escoamento abaixo do dossel, determinar sua relação com o vento acima da f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/10/2009