文献类型：期刊文献

中文题名：气液鼓泡塔内多气泡上升运动的直接数值模拟

英文题名：Direct numerical simulation of the rising motion of multiple bubbles in a gas-liquid bubbling tower

作者：Jiajin, Gu[1]; Caixia, Chen[1]; Zihong, Xia[1]

机构：[1] School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2025

卷号：44

期号：S1

起止页码：51

外文期刊名：Huagong Jinzhan/Chemical Industry and Engineering Progress

收录：EI(收录号：20260319916256)

语种：中文

外文关键词：Bubble columns - Bubbles (in fluids) - Chemical industry - Cryptography - Flocculation - Nozzles - Numerical methods - Numerical models - Open source software - Open systems - Oscillating flow - Phase interfaces

摘要：The research progress of simulating the upward movement of bubbles in bubble towers by direct numerical simulation methods was reviewed. The optimization of the grid density in the open source software Basilisk and the limitations of the traditional isolated bubble assumption in accurately describing the behavior of multiple bubbles were introduced. The specific settings of Basilisk in gasliquid interface reconstruction and grid encryption were detailed, achieving a real-time grid with grid densities above 30 grids per bubble diameter. Based on the existing isolated bubble model, a multibubble model was constructed. Three-dimensional direct numerical simulation of the dynamic interactions of multiple bubbles from a single nozzle and multiple nozzles was studied by using this model. The results showed that with increases in inlet gas velocities, the zigzag swings of the bubble became less dramatic, the oscillation amplitude of decreases, while the frequency of bubble coalescence increased. Some bubbles that had not been accelerated sufficiently were caught up with the newly generated bubbles. A critical nozzle spacing for the interaction of multiple bubbles was about 3 times the nozzle diameter. The arrangement effects of multiple nozzle on the bubble interactions were insignificant, with reduced bubble swings and decreased oscillation amplitude compared to a single nozzle. Bubble rising velocities were primarily influenced by bubble sizes, with little effect from nozzle spacing or arrangement. Affected by liquid-phase turbulence, the resistance coefficient of multiple bubbles rising was greater than that of isolated bubbles rising. ? (2025), (Chemical Industry Press Co., Ltd.). All rights reserved.