Dynamic regimes of electrified liquid filaments

被引：27

作者：

Kong, Tiantian ^{[1
,2
]}

Stone, Howard A. ^{[3
]}

Wang, Liqiu ^{[2
,4
]}

Shum, Ho Cheung ^{[2
,5
]}

机构：

[1] Shenzhen Univ, Sch Med, Dept Biomed Engn, Guangdong Key Lab Biomed Measurements & Ultrasoun, Shenzhen 518000, Peoples R China

[2] Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Hong Kong, Peoples R China

[3] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA

[4] Univ Hong Kong, Zhejiang Inst Res & Innovat, Hangzhou 311300, Zhejiang, Peoples R China

[5] Univ Hong Kong, Shenzhen Inst Res & Innovat, Shenzhen 518000, Peoples R China

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2018年 / 115卷 / 24期

基金：

中国国家自然科学基金;

关键词：

instability; electrified filaments; electrospinning; viscous flow; ELECTRICALLY FORCED JETS; BENDING INSTABILITY; HIGH-PERFORMANCE; STABILITY; INKJET;

D O I：

10.1073/pnas.1801053115

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We investigate the dynamics of an electrified liquid filament in a nozzle-to-substrate configuration with a close separation. The interplay between compressive viscous and electrostatic stresses dictates previously undocumented transitions between dynamic regimes of "jetting," "coiling," and "whipping." In particular, the onsets of both coiling and whipping instabilities are significantly influenced by the minimum radius along the liquid filament. Using a low-interfacial-tension system, we unravel the physics behind the transitions between jetting, coiling, and whipping of an electrified filament for a range of liquid properties and geometric parameters. Our results enrich the overall physical picture of the electrically forced jets, and provide insights for the emerging high-resolution instability-assisted printing of materials such as folded assemblies and scaffolds.

引用

页码：6159 / 6164

页数：6

共 53 条

[1] High-Resolution Printing of 3D Structures Using an Electrohydrodynamic Inkjet with Multiple Functional Inks [J].