Electrohydrodynamic behaviors of droplet under a uniform direct current electric field

doi:10.1088/1674-1056/ab6835

中国物理B ›› 2020, Vol. 29 ›› Issue (3): 34703-034703.doi: 10.1088/1674-1056/ab6835

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Electrohydrodynamic behaviors of droplet under a uniform direct current electric field

Zi-Long Deng(邓梓龙), Mei-Mei Sun(孙美美), Cheng Yu(于程)

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu 96822, USA

收稿日期:2019-08-01 修回日期:2019-11-22 出版日期:2020-03-05 发布日期:2020-03-05
通讯作者: Cheng Yu E-mail:iamyucheng@seu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51725602 and 51906039) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180405).

Electrohydrodynamic behaviors of droplet under a uniform direct current electric field

Zi-Long Deng(邓梓龙)¹, Mei-Mei Sun(孙美美)¹, Cheng Yu(于程)^1,2

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China;
2 Department of Mechanical Engineering, University of Hawaii at Manoa, Honolulu 96822, USA

Received:2019-08-01 Revised:2019-11-22 Online:2020-03-05 Published:2020-03-05
Contact: Cheng Yu E-mail:iamyucheng@seu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51725602 and 51906039) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20180405).

摘要/Abstract

摘要： The electrohydrodynamic behaviors and evolution processes of silicone oil droplet in castor oil under uniform direct current (DC) electric field are visually observed based on a high-speed microscopic platform. Subsequently, the effects of different working conditions, such as electric field strength, droplet size, etc., on droplet behaviors are roundly discussed. It can be found that there are four droplet behavior modes, including Taylor deformation, typical oblique rotation, periodic oscillation, and fracture, which change with the increase of electric field strength. It is also demonstrated that the degree of flat ellipse deformation gets larger under a stronger electric field. Moreover, both of the stronger electric field and smaller droplet size lead to an increase in the rotation angle of the droplet.

关键词: DC electric field, droplet, deformation, rotation

Abstract: The electrohydrodynamic behaviors and evolution processes of silicone oil droplet in castor oil under uniform direct current (DC) electric field are visually observed based on a high-speed microscopic platform. Subsequently, the effects of different working conditions, such as electric field strength, droplet size, etc., on droplet behaviors are roundly discussed. It can be found that there are four droplet behavior modes, including Taylor deformation, typical oblique rotation, periodic oscillation, and fracture, which change with the increase of electric field strength. It is also demonstrated that the degree of flat ellipse deformation gets larger under a stronger electric field. Moreover, both of the stronger electric field and smaller droplet size lead to an increase in the rotation angle of the droplet.

Key words: DC electric field, droplet, deformation, rotation

中图分类号: (Drops and bubbles)

47.55.D-

68.05.-n (Liquid-liquid interfaces) 47.65.-d (Magnetohydrodynamics and electrohydrodynamics)

邓梓龙, 孙美美, 于程. Electrohydrodynamic behaviors of droplet under a uniform direct current electric field[J]. 中国物理B, 2020, 29(3): 34703-034703.

Zi-Long Deng(邓梓龙), Mei-Mei Sun(孙美美), Cheng Yu(于程). Electrohydrodynamic behaviors of droplet under a uniform direct current electric field[J]. Chin. Phys. B, 2020, 29(3): 34703-034703.

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Electrohydrodynamic behaviors of droplet under a uniform direct current electric field

Electrohydrodynamic behaviors of droplet under a uniform direct current electric field

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