The Effect of Bubble-Induced Turbulence and the Bubble Size on the Interfacial Area Transport in Gas-Liquid Two-Phase Flow

Abstract

In the present work, two common modeling concepts taking into account of the influence of bubbles on the turbulence of liquid phase were implemented in the EAGLE code and assessed against Hibiki’s experiment data. The EAGLE (Elaborated Analysis of Gas-Liquid Evolution) code has been developed at KAERI based on the two-fluid model for a multi- dimensional analysis of two-phase flow with the implementations of non-drag force, standard k-ε turbulence model, and the interfacial area transport equation. In order to investigate the bubble size effect on two-phase flow evolution and to provide a data set for developing the physical models to describe the bubble-induced turbulence effect and also for validating the EAGLE code, a series of local parameter measurements as well as visualization tests were conducted in air-water vertical-upward flow condition in which the initial bubble size is controlled by a specially designed bubble generator. The numerical and experimental results are compared, analyzed and discussed in this paper.