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논문 상세정보

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.

참고문헌 (14)

  1. Rayleigh, F. R. S., 1878, 'On the Instability of Jets,' Proc. London Math. Soc., Vol. 10, No.4, pp. 4-13 
  2. Meinhart, C. D. and Zhang, H., 2000, 'The Flow Structure Inside a Microfabricated Inkjet Printhead,' J. Microelectromechanical Systems, Vol. 9, No.1, pp. 67-75 
  3. Tekin, E., de Gans, B. J. and Schubert, U. S., 2004, 'Ink-Jet Printing of Polymers - from Single Dots to Thin Film Libraries,' J. Materials Chemistry, Vol. 14,pp.2627-2632 
  4. de Gans, B. J., Duinevald, P. C. and Schubert, U. S., 2004, 'Inkjet Printing of Polymers: State of the Art and Future Developments,' Advanced Materials, Vol. 16, No.3, pp. 203-213 
  5. Shore, H. J. and Harrison, G M., 2005, 'The Effect of Added Polymers on the Formation of Drops Ejected from a Nozzle,' Physics of Fluids, Vol. 17, pp.033104-1-033104-7 
  6. Furbank, R. J. and Morris, J. F., 2004, 'An Experimental Study of Particle Effects on Drop Formation,' Physics of Fluids, Vol. 16, No.5, pp. 1777-1790 
  7. Feng, J. Q., 2002, 'A General Fluid Dynamic Analysis of Drop Ejection in Drop-on-Demand Ink Jet Devices,' J. Imaging Science and Technology, Vol. 46, No.5, pp. 398-408 
  8. Wu, H. C., Hwang, W. S. and Lin, H. J., 2004, 'Development of a Three-Dimensional Simulation System for Micro-Inkjet and Its Experimental Verification,' Materials Science & Engineering A, Vol. 373, pp. 268-278 
  9. Kim, S. and Son, G., 2005, 'Numerical Study on Drop Formation Through a Micro Nozzle,' Trans. of the KSME (B), Vol. 29, No.2, pp. 205-213 
  10. Yang, A. S., Yang, J. C. and Hong, M. C., 2006, 'Droplet Ejection Study of a Picojet Printhead,' J. Micromechanics and Microengineering, Vol. 16, pp. 180-188 
  11. $CFD-ACE(U)^{TM}$ 2004 User's Manual, ESICFD Inc., Huntsville, AL, 2004, Web site: www.cfdrc.com 
  12. Dijksman, J. F., 1999, 'Hydro-Acoustics of Piezoelectrically Driven Ink-Jet Print Heads,' Flow, Turbulence and Combustion, Vol. 61, pp. 211-237 
  13. Derby, B. and Reis N., 2003, 'Inkjet Printing of Highly Loaded Particulate Suspensions,' MRS Bulletin, November, pp. 816-818 
  14. Pan, F., Kubby, J. and Chen, J., 2002, 'Numerical Simulation of Fluid-Structure Interaction in a MEMS Diaphragm Drop Ejector,' J. Micromechanics and Microengineering, Vol. 12, pp. 70-76 

이 논문을 인용한 문헌 (2)

  1. Kim, Myong-Ki ; Kang, Heui-Seok ; Kang, Kyung-Tae ; Lee, Sang-Ho ; Hwang, Jun-Young ; Moon, Seung-Jae 2010. "Laser Sintering of Inkjet-Printed Silver Lines on Glass and PET Substrates" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 34(11): 975~982 
  2. Lee, Jung-Tack ; Choi, Jae-Ho ; Kim, Ki-Wan ; Shin, Myoung-Sun ; Kim, Keun-Joo 2011. "Manufacturing of Ag Nano-particle Ink-jet Printer and the Application into Metal Interconnection Process of Si Solar Cells" 반도체디스플레이기술학회지 = Journal of the semiconductor & display technology, 10(2): 73~81 

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