Direct measurements of air layer profiles under impacting droplets using high-speed color interferometry

Roeland C.A. van der Veen, Tuan Tran, Detlef Lohse, Chao Sun

Research output: Contribution to journalArticleAcademicpeer-review

92 Citations (Scopus)
79 Downloads (Pure)

Abstract

A drop impacting on a solid surface deforms before the liquid makes contact with the surface. We directly measure the time evolution of the air layer profile under the droplet using high-speed color interferometry, obtaining the air layer thickness before and during the wetting process. Based on the time evolution of the extracted profiles obtained at multiple times, we measure the velocity of air exiting from the gap between the liquid and the solid, and account for the wetting mechanism and bubble entrapment. The present work offers a tool to accurately measure the air layer profile and quantitatively study the impact dynamics at a short time scale before impact
Original languageEnglish
Article number026315
Number of pages6
JournalPhysical review E: Statistical, nonlinear, and soft matter physics
Volume85
Issue number2
DOIs
Publication statusPublished - 2012

Keywords

  • METIS-284872
  • IR-79928

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