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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Horizontal Air-Water Two Phase Slug Flow: Eulerian and Lagrangian Data Analysis
Submission Author:
Conrado Chiarello , PR
Co-Authors:
Conrado Chiarello, Hedilberto Barros, Moisés Marcelino Neto, Rigoberto Morales
Presenter: Conrado Chiarello
doi://10.26678/ABCM.ENCIT2020.CIT20-0488
Abstract
Multiphase flows are recurrent phenomena both in natural environments – such as volcanic eruptions and blood flow through veins – and industrial environments – such as the nuclear and petroleum industries. Knowledge about the hydrodynamics of the flow as well as its evolution across the pipeline is essential to correctly design pipelines, equipments (such as pumps and slug catchers) and to formulate strategies to optimize the crude oil exploitation from reservoirs. A frequently reported flow pattern in oil pipelines is slug flow, reason why the present study focuses in its investigation. In order to analyze the flow, a novel methodology is proposed and applied to data retrieve in Multiphase Flow Center (NUEM) experimental facilities. The experimental loop has a length of 35.6 m and 26 mm internal diameter and was operated under 18 different slug flow conditions across 5 different measuring stations composed by a pair of two-wire resistive sensors distributed along the pipe. Data was analyzed using Eulerian reference frame (ERF), which provides distributions for each hydrodynamic parameter in each measuring station for every experimental point, and Lagrangian reference frame (LaRF), which follows unit cells across the pipeline in order to evaluate the change in hydrodynamic parameters of single structures. Correlations were proposed based on retrieved results for hydrodynamic parameters’ average values and standard deviation. Moreover, a comparison against previous works was made in order to test the proposed correlations as well as to propose corrections to the existing ones. Furthermore, details of the flow were investigated using the proposed methodology, which was able to provide additional and insightful information about the flow behavior.
Keywords
multiphase flow, Slug Flow, Gas-liquid slug flow, Horizontal Multiphase Gas-Liquid fluid flow, Eulerian-Lagrangian method, Lagrangian approach, Lagrangian description
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