Investigation of droplet drying characteristics using an acoustic-aerodynamic levitator

G. Brenn, D. Rensink, C. Tropea, A. L. Yarin

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The evaporation of liquid drops levitated in an acoustic-aerodynamic levitator is studied both theoretically and experimentally. The theoretical description takes the deformed drop shapes into account and is applicable for arbitrary ratios λ/2πα00 of sound wavelength to drop circumference. The experimental technique is based on the processing of video images to measure the evaporation rates of the levitated drops. Results consist mainly in the function d2 = f(t) of the squared volume-equivalent drop diameter, the drop shapes and the drop displacement from the pressure node as functions of time. The agreement between experiment and theory for small times is encouraging, the disagreement for larger times indicates liquid impurities which must be avoided in the future.

Original languageEnglish
Pages (from-to)633-642
Number of pages10
JournalInternational Journal of Fluid Mechanics Research
Volume24
Issue number4-6
DOIs
Publication statusPublished - 1997

Keywords

  • Acoustic-aerodynamic levitator
  • Drop lifetime
  • Droplet drying
  • Heat and mass transfer
  • Imaging technique

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)

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