Experimental study on fluid selection for a stable Taylor cone formation via micro-PIV measurement SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Experimental study on fluid selection for a stable Taylor cone formation via micro-PIV measurement
Author(s)
Kim, Jihoon; Tran, Si Bui Quang; Seong, Baekhoon; Lee, Hyungdong; Kang, Giho; Ko, Jin Hwan; Byun, Doyoung
Publication Year
2020-06
Abstract
In this study, the visualization of the flow inside a Taylor cone formed during an electrohydrodynamic (EHD) spraying is conducted to analyze its stability among five liquid candidates. A micro-PIV with a micro-nozzle is used for the visualization, and the physical properties as well as measured values are utilized in the analysis. First, in forming the Taylor cone, the electrohydrodynamic force is required to be sufficiently large in order to overcome the surface tension of the liquid. Thus, among the five liquids tested here, three, in this case IPA, EtOH, and MeOH, form a Taylor cone due to the relatively low surface tension levels as compared to the others. Once electrohydrodynamic jetting occurs, the average and maximum velocities become monotonically proportional to the average current. As the velocities are the smallest in using IPA, the circulation flow becomes superior to the extrusive flow, which yields the stable formation of a Taylor cone. Also, low fluctuation of the instantaneous currents supports the stable formation of IPA. Consequently, IPA shows the most stable formation of the Taylor cone in our condition due to the lowest average current and low-level surface tension. Eventually, micro-PIV would be a good tool in choosing an optimal fluid for stable EHD spraying.
ISSN
1343-8875
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40252
DOI
10.1007/s12650-020-00631-4
Bibliographic Citation
JOURNAL OF VISUALIZATION, v.23, no.3, pp.449 - 457, 2020
Publisher
SPRINGER
Subject
FABRICATION; ELECTROSPRAY; FLOWS; JET
Keywords
Flow visualization; Electrohydrodynamic jet; Micro-particle image velocimetry; Taylor cone
Type
Article
Language
English
Document Type
Article
Publisher
SPRINGER
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