Deformation and Coulomb splitting mode of droplets under electric field

被引：0
作者：
Wang J. [1 ]
Fan Z. [1 ]
Wang D. [1 ]
Lu S. [1 ]
机构：
[1] College of Energy and Power Engineering, Jiangsu University, Zhenjiang
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 10期
关键词：
Charged droplet; Coulomb splitting; Deformation; Methanol; Pattern phase diagram; Tomography;
D O I：
10.16085/j.issn.1000-6613.2020-2150
中图分类号：
学科分类号：
摘要：
A visual study of the microscopic morphological characteristics of methanol droplets under the action of an electric field was carried out based on high-speed tomography technology. The time-resolved deformation and the Coulomb splitting evolution behavior of charged droplets at different growth stages in a two-phase flow system were accurately captured. The details of the deformation and splitting process as well as behavior evolution of the charged droplets under different working conditions were achieved. Considering the coupled effect of the Coulomb force as well as dielectrophoretic force and the surrounding flow regimes on the droplet, the formation mechanism of the Coulomb split of the droplet at different growth stages in the presence of an electric field was revealed. The results showed that the electric field strength and the droplet size were the main factors that determine droplet deformation and the Coulomb splitting mode. The deformation and Coulomb splitting mode of charged droplets could be divided into pushed deformation, top breakup, top-sided breakup, and umbrella-shaped breakup. Combining the dimensionless parameters to quantitatively analyze the deformation and breakup characteristics of the droplet, the degree of droplet deformation and top breakup became more severe. The critical umbrella-shaped breakup length of the droplet decreased with the increase of the electric field intensity and the decrease of the droplet size. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：5451 / 5458
页数：7
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