Two-Phase Flow CFD Simulations of Bubble Crystallization Tube

Abstract

At present, the studies of bubble crystallization focus on the gas velocity, crystallization efficiency and crystallization yield, the effects of other factors were not considered. So it is very important to study factors comprehensively that effect on the gas-liquid two-phase flow of bubble crystallization. In this paper, Fluent was used as a computing platform and RNG k-ε turbulence model and VOF multi-phase model was selected to simulate gas-liquid two-phase flow of bubble crystallization. The results show that as the gas inlet velocity increases, slug bubbles are more and more bigger, more and more dispersed bubbles are below the slug bubbles, crystallization efficiency first increases and then decreases; Under the gas pulse-inlet form condition, the better operating parameters are: gas velocity 1.0m/s, pulse duration 0.4s, interval time 0.8s, crystallization tube diameter 40mm. Simulations agree well with experimental data.