대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제30권10호
  • /
  • Pages.1003-1011
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  • 2006
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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피에조 잉크젯 헤드에서 액적 토출 현상에 대한 연구

A Study on Droplet Formation from Piezo Inkjet Print Head

  • 오세영 (삼성종합기술원 Micro Device & Systems Lab.) ;
  • 이정용 (삼성종합기술원 Micro Device & Systems Lab.) ;
  • 이유섭 (삼성종합기술원 Micro Device & Systems Lab.) ;
  • 정재우 (삼성종합기술원 Micro Device & Systems Lab.) ;
  • 위상권 (삼성종합기술원 Micro Device & Systems Lab.)
  • 발행 : 2006.10.01
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초록

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.

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참고문헌

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