Slug Flow
Mostrando 13-24 de 36 artigos, teses e dissertações.
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13. Estudo experimental e numerico da dinamica de movimento de Riser em catenaria com escoamento interno / Experimental and numerical study of the motion dynamics of catenary riser considering internal flow
The pipe which transports fluids from the petroleum production well, on the seabed, up to the production unity, on the sea surface, is named riser. The main objective of this work is to characterize the dynamic response of a riser, hanging in catenary configuration, with the influence of the internal flow of hydrocarbons. It was observed from literature, tha
Publicado em: 2008
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14. 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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15. A generalized gas-liquid two-phase flow analysis for efficient operation of airlift pump
Airlift pumps are finding increasing use where pump reliability and low maintenance are required, where corrosive, abrasive, or radioactive fluids must be handled and when a compressor is readily available. The objective of the present study is to evaluate the performance of a pump under predetermined operating conditions and to optimize the related paramete
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-09
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16. PREVISÃO NUMÉRICA DE ESCOAMENTO BIFÁSICO EM TUBULAÇÕES UTILIZANDO O MODELO DE DESLIZAMENTO / NUMERICAL PREDICTION OF TWO-PHASE FLOW IN PIPELINE WITH THE DRIFT-FLUX MODEL
Na produção de gás e petróleo em campos de águas profundas são comumente encontrados trechos verticais de dutos (risers) na aproximação final à plataforma. Nesta configuração, podem ocorrer escoamentos bifásicos no regime de golfadas severas (severe slug) que gera alternância na produção da fase gasosa e líquida. Esta alternância é caracter
Publicado em: 2007
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17. DEVELOPMENT OF TECHNIQUE BASED ON FLUORESCENCE TO MEASURE TWOPHASE SLUG FLOW / DESENVOLVIMENTO DE TÉCNICA BASEADA EM FLUORESCÊNCIA PARA MEDIÇÃO DE ESCOAMENTO BIFÁSICO EM REGIME DE GOLFADA
This work presents the implementation of a non-intrusive optical technique for measuring the hydrodynamic characteristics of liquid- gas, two-phase flows. The work was limited to the study of air-water slug flows. The technique implemented, already described in the literature, combines Particle Image Velocimetry - PIV, Laser Induced Fluorescence - LIF, and p
Publicado em: 2007
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18. Um sistema para estimação da vazão de gás de poços produzindo por Plunger Lift para vaso separador de teste em plataformas de petróleo
This work intends to analyze the behavior of the gas flow of plunger lift wells producing to well testing separators in offshore production platforms to aim a technical procedure to estimate the gas flow during the slug production period. The motivation for this work appeared from the expectation of some wells equipped with plunger lift method by PETROBRAS i
Publicado em: 2007
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19. Influencia da viscosidade sobre o escoamento gas-liquido horizontal intermitente / Influence of viscosity on the gas liquid intermittent flow in the horizontal pipe
Uma mistura de gás e líquido escoando em um tubo para uma larga faixa de vazões tem as fases gás e líquido distribuídas na tubulação de forma intermitente. Esse padrão é caracterizado por uma sucessão de longas bolhas seguidas de pistões de líquido que não ocorrem com tamanhos e periodicidade definidos devido às interações cinemáticas e din
Publicado em: 2007
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20. Carbon dioxide evaporation in a single microchannel
Despite its importance for designing evaporators and condensers, a review of the literature shows that heat transfer data during phase change of carbon dioxide is very limited, mainly for microchannel flows. In order to give a contribution on this subject, an experimental study of CO2 evaporation inside a 0.8 mm-hydraulic diameter microchannel was performed
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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21. SIMULAÇÃO NUMÉRICA DE ESCOAMENTOS BIFÁSICOS NO REGIME DE GOLFADAS EM TUBULAÇÕES HORIZONTAIS E LEVEMENTE INCLINADAS / NUMERICAL SIMULATION OF TWOPHASE SLUG FLOW IN HORIZONTAL AND NEARLY HORIZONTAL PIPES
Escoamentos bifásicos no regime de golfadas são caracterizados pela alternância de pacotes de líquido e grandes bolhas de gás na tubulação, sendo associados a altas perdas de carga, além de trazer uma indesejada intermitência aos escoamentos. O desenvolvimento do regime de golfadas em tubulações horizontais se dá a partir do escoamento estratific
Publicado em: 2006
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22. Two-phase non-equilibrium models: the challenge of improving phase change heat transfer prediction
This lecture addresses some recent developments in modelling of macroscopic thermodynamic and hydrodynamic non-equilibrium phenomena in convective phase change (boiling and condensation) of pure fluids and mixtures. Proper accounting of such phenomena may hold the key to explain and predict deviations from the classical (equilibrium) phase change convective
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-03
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23. ANALYSIS OF SLUG FLOW IN HORIZONTAL PIPELINES BY THE TWO FLUID MODEL / ANÁLISE DO PADRÃO SLUG EM TUBULAÇÕES HORIZONTAIS UTILIZANDO O MODELO DE DOIS FLUIDOS
Diversos processos práticos apresentam uma seqüência de diferentes configurações de escoamentos bifásicos, com diferentes padrões de escoamento. Dependendo das razões entre as velocidades superficiais do gás e do líquido, diferentes padrões de escoamento bifásico podem ser encontrados. O padrão de escoamento slug pode ser formado a partir do pad
Publicado em: 2004
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24. Horizontal Slug Flow in a Large-Size Pipeline: Experimentation and Modeling
The knowledge of the slug flow characteristics is very important when designing pipelines and process equipment. When the intermittences typical in slug flow occurs, the fluctuations of the flow variables bring additional concern to the designer. Focusing on this subject the present work discloses the experimental data on slug flow characteristics occurring
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2001