CFD Simulation of Adiabatic Two-Phase Flow in the Cap Bubble Regime Using the Two-Group Interfacial Area Transport Equations (IATE)

Abstract

A multidimensional three-field two-fluid model with the two-group IATE is implemented for the bubbly-cap bubble regime. The mechanisms of the two-group IATE bubble interactions that have been proposed and validated in the past for one dimension are extended to a multi-dimensional model. The CFD simulations were validated using the data of Sun et al. [1] where the phase distribution, interfacial area concentration and velocity distribution in the cross-section for the two bubble groups were measured using the four-sensor conductivity probe at four axial locations. The results demonstrate the applicability of the two-group IATE model in three dimensions.