Resonant oscillation phenomena of a sessile droplet on electrohydrodynamic jetting nozzle

Ho Kim, Jungkeun Yang, Jaewon Chung

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The resonant oscillation of a sessile droplet on the electrohydrodynamic (EHD) jetting nozzle was studied using a series of sinusoidal and square pulse voltage signal. At small amplitude oscillations, the lowest mode resonant frequency depended on a contact angle and the explicit relationship was developed assuming one-dimensional standing capillary wave. When the meniscus was oscillated with a higher voltage amplitude for jetting, its height became maximum at the phase delay of about Π/2 from the maximum applied voltage signal, which can be predicted in a harmonic oscillator model. In addition, there existed an effective resonant frequency where the meniscus oscillation was amplified quickly to initiate a jetting earlier, and the jetting continued every cycle afterwards. Therefore, the resonant oscillation would be effectively used for high speed printing of a simple regular pattern where the jetting should occur at a constant frequency.

Original languageEnglish
Article number05HC03
JournalJapanese Journal of Applied Physics
Volume53
Issue number5 SPEC. ISSUE 3
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Electrohydrodynamics
electrohydrodynamics
nozzles
Nozzles
oscillations
Natural frequencies
menisci
Electric potential
resonant frequencies
capillary waves
Contact angle
Printing
electric potential
printing
harmonic oscillators
high voltages
high speed
cycles
pulses

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Resonant oscillation phenomena of a sessile droplet on electrohydrodynamic jetting nozzle. / Kim, Ho; Yang, Jungkeun; Chung, Jaewon.

In: Japanese Journal of Applied Physics, Vol. 53, No. 5 SPEC. ISSUE 3, 05HC03, 01.01.2014.

Research output: Contribution to journalArticle

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