Study of piezoelectric transducer for liquid ejection

S. F. Hon, Kin Wing Kwok

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Self-focused acoustic transducers using using Fresnel zone plates have been fabricated and used to eject droplets of high-viscosity liquid, without nozzle, in the drop-on-demand mode. The Fresnel zone plate consists of a series of annular electrodes of half-wave-band source, and the acoustic waves are focused by constructive wave interference. Droplets of glycerin with a high-viscosity of 1400 cP can be ejected under a field of 200 kV/m and at a repetitive frequency of 120 Hz. The acoustic pressure distribution in the glycerin has been been simulated using an open-source computational fluid dynamic code OpenFOAM and measured using a needle-type hydrophone. Both the simulation and measurement give the location of two focal points which agree with the observations in the droplet ejection experiment.
Original languageEnglish
Title of host publication2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time Forum
Pages1050-1054
Number of pages5
DOIs
Publication statusPublished - 19 Nov 2009
Event2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time Forum - Besancon, France
Duration: 20 Apr 200924 Apr 2009

Conference

Conference2009 IEEE International Frequency Control Symposium Joint with the 22nd European Frequency and Time Forum
Country/TerritoryFrance
CityBesancon
Period20/04/0924/04/09

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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