流经突然扩张的微通道的单气泡界面形态演变的数值模拟

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鲍允州,吴忱韩,张莹*

南昌大学机电工程学院，江西南昌 330031

收稿日期:2017-12-12修回日期:2018-03-16出版日期:2018-12-22发布日期:2018-12-19
通讯作者:张莹

基金资助:毛细管内脉动两相流动的演化规律和机理研究;南昌大学研究生创新专项

Numerical simulation of interface evolution of single bubble rising through sudden expansion channel

Yunzhou BAO, Chenhan WU, Ying ZHANG*

School of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, China

Received:2017-12-12Revised:2018-03-16Online:2018-12-22Published:2018-12-19
Contact:Ying ZHANG

摘要/Abstract

摘要： 采用界面追踪方法(FTM)研究了狭窄通道内受浮力上升的单气泡经过突然扩张通道时的运动形态，考察了狭窄通道和宽阔通道的通道宽度比及Eotvos数(Eo)和Morton数(Mo)对气泡形态和上升速度的影响. 结果表明，在狭窄通道、扩张部位和宽阔通道内气泡形态呈不同特性，气泡在离开扩张处时高宽比最大. 随通道宽度比增大，气泡最大高宽比减小. Eo数较小时，减小Mo数，气泡高宽比减小，气泡上升速度增大；增大Eo数，气泡上升时形变更严重. 改变初始时刻气泡相对于狭窄通道的位置对气泡形态有影响，初始位置靠近单侧壁面时，气泡横向变形较严重，在两侧壁面之间摆动上升.

引用本文

鲍允州吴忱韩张莹. 流经突然扩张的微通道的单气泡界面形态演变的数值模拟[J]. 过程工程学报, 2018, 18(6): 1178-1186.
Yunzhou BAO Chenhan WU Ying ZHANG. Numerical simulation of interface evolution of single bubble rising through sudden expansion channel[J]. Chin. J. Process Eng., 2018, 18(6): 1178-1186.

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