文献类型：期刊文献

中文题名：CO_(2)多气泡上升过程传质特性的数值分析

英文题名：Numerical analysis of mass transfer characteristics in rising process of CO_(2) multiple bubbles

作者：曾乐翔[1];裴东号[1];王现刚[1];曹军[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237

年份：2024

卷号：52

期号：9

起止页码：37

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD_E2023_2024】；

基金：上海市自然科学基金资助项目(20ZR1413200);中石化科技开发项目(320131-3)。

语种：中文

中文关键词：CO_(2)气泡;气液两相流;传质;数值模拟;聚并

外文关键词：CO_(2)bubble;gas-liquid two-phase flow;mass transfer;numerical simulation;coalescence

摘要：为了揭示CO_(2)多气泡上升行为和气液传质过程的相互作用机制,通过VOF(流体体积法)多相流模型结合自定义程序,实现气泡流动与传质的耦合,数值模拟结果表明:CO_(2)多气泡上升过程出现了聚并、破碎、自由上升和排斥等相互作用现象,气泡尾流经历对称脱落、过渡态和周期性脱落3个阶段,气泡初始间距、气泡初始大小和液相物性等因素共同影响着多气泡的运动和传质过程。初始间距较小时气泡易聚并,聚并过程减小了气液接触面积,不利于传质;初始直径较小时气泡运动越不稳定,停留时间长,可以促进气液传质;液相黏度越大阻力越大,抑制了气相在尾流的扩散,不利于传质。
In order to reveal the interaction mechanism between the rising behavior of CO_(2) gas bubbles and the mass transfer process,the coupling of bubble flow and mass transfer was achieved through the VOF multiphase flow model combined with a custom program.Numerical simulation results show that during the process of CO_(2) gas bubble rising,phenomena such as coalescence,breakup,free rising and repulsion occur.The bubble wake experiences three stages:symmetrical detachment,transitional state and periodic detachment.Factors such as initial bubble spacing,initial bubble size and liquid phase properties collectively influence the movement and mass transfer process of multiple bubbles.When the initial spacing is small,bubbles are more likely to coalesce,which reduces the gas-liquid contact area and is not conducive to mass transfer.When the initial diameter is small,the bubble movement is more unstable and the residence time is longer,which can promote gas-liquid mass transfer.The greater the liquid viscosity,the greater the resistance,which inhibits the diffusion of the gas phase in the wake and is not conducive to mass transfer.