Impact behavior of oppositely charged droplet and solid surfaces

被引：0
|
作者：
Tang F. [1 ]
Zeng Y. [1 ]
Zhou W. [1 ]
Zheng H. [1 ]
机构：
[1] School of Power and Mechanical Engineering, Wuhan University, Wuhan
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 11期
基金：
中国国家自然科学基金;
关键词：
bubble; charged droplets; charged surface; impact dynamics;
D O I：
10.11817/j.issn.1672-7207.2023.11.031
中图分类号：
O441.1 [电学]; TM12 [];
学科分类号：
摘要：
The impact dynamics between oppositely charged droplets and solid surfaces was explored through experiments and the effect of charge conditions on impact dynamics was obtained. The mechanism of action during the impact process was proposed. The results show a conical tip contact between droplets and solid surfaces. With higher charge densities of droplets and solid surfaces, the conical tip angles get larger. Such a conical tip contact can eliminate the impacting bubbles between neutral droplets and solid surfaces. In the case of charged droplets impacting a charged surface, the negative charge in the droplet and the positive charge on the surface are partially neutralized. Charge neutralization leads to smaller droplet contact angles. The maximum spread width increases with the increase of droplet charge density and surface charge density. The contact time and recoil height increase with the increase of droplet charge density and decrease with the increase of surface charge density. © 2023 Central South University of Technology. All rights reserved.
引用
收藏
页码：4539 / 4550
页数：11
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共 29 条
  • [1] SIRRINGHAUS H, KAWASE T, FRIEND R H, Et al., High-resolution inkjet printing of all-polymer transistor circuits, Science, 290, 5499, pp. 2123-2126, (2000)
  • [2] ZHAI L, BERG M C, CEBECI F, Et al., Patterned superhydrophobic surfaces: toward a synthetic mimic of the Namib Desert beetle, Nano Letters, 6, 6, pp. 1213-1217, (2006)
  • [3] CALDARELLI A, RAIMONDO M, VERONESI F, Et al., Sol-gel route for the building up of superhydrophobic nanostructured hybrid-coatings on copper surfaces, Surface and Coatings Technology, 276, pp. 408-415, (2015)
  • [4] APPAH S, ZHOU Huitao, WANG Pei, Et al., Charged monosized droplet behaviour and wetting ability on hydrophobic leaf surfaces depending on surfactant-pesticide concentrate formulation, Journal of Electrostatics, 100, (2019)
  • [5] ZHONG Kai, QIN Jing, PEI Yiqiang, Et al., Breakup process of crown spray induced by impact on thin oil film of single droplet, Journal of Central South University(Science and Technology), 53, 4, pp. 1497-1505, (2022)
  • [6] ZHAO Wei, LIANG Caihua, CHENG Saifeng, Et al., Rule of droplets growth in the early stage of frost formation on superhydrophobic surfaces, Journal of Central South University(Science and Technology), 51, 1, pp. 231-238, (2020)
  • [7] SHANG Yuheng, HOU Yu, BAI Bofeng, Et al., Effect of surface subcooling on the droplet impacting dynamics, Journal of Harbin Institute of Technology, 54, 7, pp. 104-110, (2022)
  • [8] LI E Q, VAKARELSKI I U, THORODDSEN S T., Probing the nanoscale: the first contact of an impacting drop, Journal of Fluid Mechanics, 785, (2015)
  • [9] SHEN Daozhi, ZOU Guisheng, LIU Lei, Et al., Investigation of splashing phenomena during the impact of molten sub-micron gold droplets on solid surfaces, Soft Matter, 12, 1, pp. 295-301, (2016)
  • [10] HICKS P D, PURVIS R., Air cushioning and bubble entrapment in three-dimensional droplet impacts, Journal of Fluid Mechanics, 649, pp. 135-163, (2010)
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