Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Experimental and Numerical Evaluation of Churn and Slug Air-Water Flow in Horizontal and Inclined Pipes
Submission Author:
Marciellyo Oliveira , ES , Brazil
Co-Authors:
Marciellyo Oliveira, Marcel Lima, Marcio Ferreira Martins, Ramon Martins, Rogerio Ramos
Presenter: Marciellyo Oliveira
doi://10.26678/ABCM.COBEM2019.COB2019-2313
Abstract
The present work aims to verify the performance of the Volume of Fluid (VOF) model on flow pattern characterization in inclined circular cross-section pipe. For this purpose, a 42 mm diameter tube with 4.5 m length was used in numerical and experimental tests involving two flow patterns: slug and churn. VOF multiphase flow model combined with k-ε Realizable turbulence model and scalable wall function was set in the simulations, as well as specific parameters for temporal discretization, spatial discretization and, mesh refinement. The results of the simulations showed that in the slug regime, the liquid pistons were associated with a mixture of the upstream and downstream phases of the pistons, as well as higher velocity in front of the liquid mass. Comparing the experimental and numerical results, there were expressive similarities in the images of the flow patterns, especially regarding the length of the piston. For the churn regime, the results of the simulations also showed flow patterns similar to those obtained experimentally. The average behavior of both patterns was verified by a numerical parameter that represents the non-dimensional wall distance, revealing the piston’s frequencies
Keywords
air-water flow, Computacional Fluid Dynamics, volume of fluid, Inclined Pipe, flow pattern
