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|Type:||Artigo de periódico|
|Title:||Modeling And Simulation Of Two-phase Horizontal And Vertical Slug Flow Patterns With A Slug Tracking Numerical Model [modelagem E Simulação Do Escoamento Bifásico No Padrão De Golfadas Na Horizontal E Vertical Através De Um Modelo Numérico De Slug Tracking]|
|Abstract:||Multiphase mixtures are a common occurrence in oil and gas production and transportation pipelines. This mixture flow can be modeled as the biphasic flow of liquid and gas. The simultaneous flow of liquid and gas in pipelines is characterized by the pattern in which the phases are arranged. Over a wide range of flows of the phases, including the flows common to the oil industry, the flow is arranged in an intermittent pattern known as slug flows. This flow pattern is characterized by a random repetition in time and space of liquid slugs and elongated bubbles of gas. This paper presents the mathematical and numerical modeling of intermittent slug flows. Mathematical modeling is based on the application of mass conservation equations and the quantity of bubble and slug momentum. The numerical model is the dynamic tracking of slugs, in which the bubbles and slugs are spread along the pipe and can interact through the exchange of mass and the quantity of momentum. A model for the random input of the bubbles and slugs at the pipe entrance is also proposed, to capture the inherent intermittency of the flow. Numerical results obtained from the simulations are presented and they are compared with experimental data for the vertical and horizontal flow of air and water. The results show the average values and the distribution of variables along the pipeline. Furthermore, the simulation results are compared using the random and periodic boundary conditions. There is a good comparison between the numerical and experimental results, and the intermittent flow is captured.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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