Characteristics of bubble generation and motion under non-uniform electric field

被引：0
|
作者：
Yang S. [1 ]
Wang J. [1 ]
Zhang W. [1 ]
Wang D. [1 ]
机构：
[1] School of Energy and Power Engineering, Jiangsu University, Zhenjiang
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 01期
关键词：
Bubble growth; Detachment frequency; Dispersion; Microscopic high-speed camera; Non-uniform DC electric field;
D O I：
10.16085/j.issn.1000-6613.2020-0326
中图分类号：
学科分类号：
摘要：
Gas-liquid two-phase is widely observed in chemical industry, petroleum and other industrial production. The application of an electric field is considered as an effective method to enhance the phase interactions. In order to explore the growth characteristics of bubble under the non-uniform electric field, microscopic high-speed digital camera technology was used to visualize bubbles growth, detachment and movement. The micro-morphological characteristics of bubble were accurately captured. Moreover, a specific codes was set to obtain the bubble characteristic information quantitatively from the captured images, including bubble growth time, detachment frequency, volume, and velocity of movement. The results show that both the bubble growth patterns and subsequent motion are altered significantly by the electric field. The increase of the field strength causes the acceleration of bubble departure frequency and departure velocity, and the decrease of the bubble departure volume. Quantitatively, the departure frequency increased dozens of times compared with the result in free-field condition. The generation period reaches 10ms under the electric field. Bubble diameter can be reduced to half of the inner diameter of the capillary. The initial velocity of the bubble increases about four times. The lateral velocity is 80mm/s. The electric field strengthens the dispersion of bubbles in the liquid. These results provide a theoretical basis for the industrial application of charged two-phase flow. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：48 / 56
页数：8
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