Tracer Flow
Mostrando 1-12 de 68 artigos, teses e dissertações.
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1. Comportamento hidrodinâmico de sistemas alagados construídos de escoamento horizontal subsuperficial de diferentes proporções geométricas e tempos de operação
RESUMO No presente trabalho, teve-se por objetivo avaliar a influência da proporção geométrica e o tempo de operação na hidrodinâmica do sistema. Para isso, três sistemas alagados construídos de escoamento horizontal subsuperficial (SACs-EHSS) de diferentes razões comprimento:largura (L/B) foram caracterizados no que se refere ao comportamento hidr
Eng. Sanit. Ambient.. Publicado em: 25/04/2019
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2. Study of mixing behavior of cstr using CFD
The continuous stirred tank reactor (CSTR) is a widely used equipment in chemical related industries. The flow behaviour of fluid inside the reactor may either change from dispersion to ideal or ideal to dispersion mixing state. It is studied using the computational fluid dynamics (CFD) simulation software ANSYS Fluent. The mixing behaviour is predicted in t
Braz. J. Chem. Eng.. Publicado em: 2014-03
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3. Experimentação física do escoamento gás-líquido em uma coluna de bolhas retangular utilizando a técnica PIV e a técnica de sombras SHADOW / Gas- liquid experimentation in a rectangular bubble column using PIV and Shadow techniques
Bubble columns are multiphase contact devices for mass and heat transfer, wich are intensively used in different industrial areas. Flow and turbulence in these equipments are induced by the bubble rise motion. The hydrodynamics and bubble behavior in a homogeneous bubbly flow regime was analyzed in a rectangular laboratory-scale bubble column (50 x 20 x 220
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/07/2012
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4. Mathematical modeling of a three-phase trickle bed reactor
The transient behavior in a three-phase trickle bed reactor system (N2/H2O-KCl/activated carbon, 298 K, 1.01 bar) was evaluated using a dynamic tracer method. The system operated with liquid and gas phases flowing downward with constant gas flow Q G = 2.50 x 10-6 m³ s-1 and the liquid phase flow (Q L) varying in the range from 4.25x10-6 m³ s-1 to 0.50x10-6
Braz. J. Chem. Eng.. Publicado em: 2012-09
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5. Dynamic evaluation for liquid tracer in a trickle bed reactor
A mathematical model is developed for a liquid flow on solid particles in a trickle bed reactor. A mathematical formulation is followed based on the liquid-solid model approach where the liquid phase with the (KCl) tracer is treated as a continuum. The physical modeling is discussed, including the formulation of initial and boundary conditions and the descri
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
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6. Dynamic evolution of vortex dipoles
Vortex dipoles are fundamental in fluid mechanics. They are found in geophysics, engineering and industry. The two necessary conditions to generate them are a plane flow and a generating force. In this work, an experimental design to generate vortex dipoles in stratified beds is presented. Vortex rings were generated under diferent volumetric flow conditions
Revista Brasileira de Ensino de Física. Publicado em: 2011-09
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7. Partially aerated attached biomass bed reactor applied to treatment sanitary sewage treatment / Reator com leito de biomassa aderida aerado parcialmente aplicado ao tratamento de esgoto sanitário
This work aimed to evaluate the performance of a full scale up-flow attached biomass bed reactor (159 M POT.3) and with continuous aeration at 7 m above bottom of the reactor to sanitary sewage treatment. The bed of the reactor was constituted for activated granular carbon, anthracite carbon and sand. The work was divided into two stages. In the first stage,
Publicado em: 2010
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8. Simultaneous measurements of the solid particles velocity and concentration profiles in two phase flow by pulsed ultrasonic doppler velocimetry
In this experimental study, the pulsed ultrasonic Doppler velocimetry was used to measure simultaneously the local velocity and the local concentration in a flow of solid-liquid suspension in a horizontal pipe. In order to distinguish between the Doppler signals coming from the continuous phase, water and those of the glass bead particles larger than the Kol
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-12
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9. Development and implantation of an operational setup designed for the evaluation of new tracers for oil reservoir characterization / Desenvolvimento e inplantação de um sistema operacional para a qualificação do desempenho de novos traçadores para reservatórios de petróleo
Petroleum, nowadays, is one of the most important natural resources in the world, since it is one of the main primary sources of energy and also raw material for many different products. It can be found accumulated in the subsoil, and was produced from the remaining portions of animals and vegetables, in a process that took millions of years to be concluded.
Publicado em: 2008
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10. Cimentos resinosos endodônticos: selamento apical, aspectos micromorfológicos, características físicas e resistência de união à dentina / Resin-based root canal sealers: apical sealing, micromorphological aspects, physical characteristics and bond strength to dentin
Resin-based root canal sealers had their apical sealing, micromorphological aspects, physical characteristics and bond strength to dentin evaluated in this study. For this purpose, seventy-two single-rooted human premolars were endodontically treated. Thirty-three teeth were randomly divided into three groups, externally coated with nail varnish and obturate
Publicado em: 2007
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11. Participação de complexos de lantanídeos entre as fases de reservatório de petróleo
Traçadores são utilizados na explotação de reservatórios de petróleo para fornecer informações que auxiliam na otimização das operações envolvidas. Esta utilização já é comumente praticada fora do Brasil, sendo os mais empregados os radioativos, que apresentam sobre os compostos químicos as vantagens da simplicidade e sensibilidade de detec�
Publicado em: 2007
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12. Injection of the tracers in petroleum reservoir: multiscale modeling and numerical simulation / Injeção de traçadores em reservatórios de petróleo: modelagem multi-escala e simulação numérica
The spatial variations in porous media (aquifers and petroleum reservoirs) occur at all length scales (from the pore scale to the reservoir scale) and are incorporated in the governing equations for multiphase flow problems on the basis of random fields (geostatistical models). As a consequence, the velocity field is a random function of space. The randomnes
Publicado em: 2006