Estudo do escoamento multifásico tipo bolha de Taylor em dutos e conexões curvadas.

Abstract

In this work a transient theoretical study is presented to predict the behavior of the two-phase flow (gas and oil) type Taylor bubble in horizontal, vertical and curved pipes. The model considers the effect of the surface tension, gravity and viscous forces. Simulations using software CFX to investigate the hydrodynamic characteristics of the interaction between Taylor bubbles and liquid were made. The slug standard flow is laminar regime for the gas and liquid phases. Results of the velocity, pressure and volume fraction distribution are presented and the effect of the gas injection time (0,02; 0.1; 0.5 and 1.0 s), pipe diameter (3.0; 6.0; 1.2 and 2.4 mm) and curve of the pipe, velocity (0.05 and 0.1 m/s) and viscosity (0.5; 1.5; 2.5 and 5.0 Pa.s), of the oil in the shape and length of the bubble are analyzed. It was verified that the injection time considerably affects in the formation and length of the Taylor bubble and that gravitational and viscous forces are very important when are compared with the superficial tension forces.