Dynamic regimes of electrified liquid filaments

Tiantian Kong, Howard A. Stone, Liqiu Wang, Ho Cheung Shum

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

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 highresolution instability-assisted printing of materials such as folded assemblies and scaffolds.

Original languageEnglish (US)
Pages (from-to)6159-6164
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume115
Issue number24
DOIs
StatePublished - Jun 12 2018

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • Electrified filaments
  • Electrospinning
  • Instability
  • Viscous flow

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