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http://dx.doi.org/10.3795/KSME-B.2006.30.10.1003

A Study on Droplet Formation from Piezo Inkjet Print Head  

Oh Se-Young (삼성종합기술원 Micro Device & Systems Lab.)
Lee Jung-Yong (삼성종합기술원 Micro Device & Systems Lab.)
Lee Yu-Seop (삼성종합기술원 Micro Device & Systems Lab.)
Chung Jae-Woo (삼성종합기술원 Micro Device & Systems Lab.)
Wee Sang-Kwon (삼성종합기술원 Micro Device & Systems Lab.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.10, 2006 , pp. 1003-1011 More about this Journal
Abstract
Droplets are ejected onto a substrate through a nozzle by pushing liquids in flow channels of drop-on-demand devices. The behavior of ejection and formation of droplets is investigated to enhance the physical understanding of the hydrodynamics involved in inkjet printing. The free surface phenomenon of a droplet is described using $CFD-ACE^{TM}$ which employs the volume-of-fluid (VOF) method with the piecewise linear interface construction (PLIC). Droplet formation characteristics are analyzed in various flow regimes with different Ohnesorge numbers. The computational results show that the droplet formations are strongly dependent on the physical properties of working fluids and the inlet flow conditions. In addition, the wetting characteristics of working fluids on a nozzle influence the volume and velocity of a droplet produced in the device. This study may provide an insight into how a liquid droplet is formed and ejected in a piezoelectric inkjet printing device.
Keywords
Hydrodynamics; Piezo Inkjet; Droplet Formation; Ink Property; Free Surface;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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