Resonant oscillation phenomena of a sessile droplet on electrohydrodynamic jetting nozzle
- Authors
- Kim, Ho; Yang, Jungkeun; Chung, Jaewon
- Issue Date
- 5월-2014
- Publisher
- IOP PUBLISHING LTD
- Keywords
- Electrohydrodynamic (EHD); printing; resonance; oscillation; drop-on-demand (DOD); electrical breakdown
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.53, no.5
- Indexed
- SCIE
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 53
- Number
- 5
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/98653
- DOI
- 10.7567/JJAP.53.05HC03
- ISSN
- 0021-4922
- 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 pi/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. (C) 2014 The Japan Society of Applied Physics
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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