Puncture of a Viscous Liquid Film Due to Droplet Falling

Viktor G. Grishaev, Ivan K. Bakulin, Alidad Amirfazli, Iskander S. Akhatov

Research output: Contribution to journalArticlepeer-review

Abstract

Droplet impact may rupture a liquid film on a non-wettable surface. The formation of a stable dry spot has only been studied in the inviscid case. Here, we examine the break-up of viscous films, and demonstrate the importance and role of the viscous dissipation in both film and droplet. A new model was therefore proposed to predict the necessary droplet energy to create a dry spot. It also showed that the dissipation contribution in film dominates when the ratio of the thicknesses to drop diameter is larger than 7/4.

Original languageEnglish
Article number196
JournalFluids
Volume7
Issue number6
DOIs
Publication statusPublished - Jun 2022

Keywords

  • drop impact
  • film rupture
  • viscous dissipation

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