An experimental study of drop-on-demand drop formation

The dynamics of drop-on-demand (DOD) drop formation have been studied experimentally using an imaging system with an interframe time of 1μs and a spatial resolution of 0.81μm∕pixel. Using a piezoelectrical actuated inkjet printhead with the nozzle orifice diameter of 53μm, experiments were conducted over a range of viscosities (1.0–5.0cP) and surface tensions (35–73mN∕m). The effects of the driving signal, which controls the piezoelectric transducer that produces the pressure pulse to drive the liquid from the reservoir through the orifice, have been examined along with those of liquid properties. The main stages of DOD drop formation, including ejection and stretching of liquid, pinch-off of liquid thread from the nozzle exit, contraction of liquid thread, breakup of liquid thread into primary drop and satellites, and recombination of primary drop and satellites, are analyzed based on the experimental results. The breakup time of liquid threads was found to be dependent mainly on the capillary time based...

[1]  James Q. Feng.  A General Fluid Dynamic Analysis of Drop Ejection in Drop-on-Demand Ink Jet Devices , 2002 .

[2]  Frank E. Talke,et al.  A numerical comparison of one-dimensional fluid jet models applied to drop-on-demand printing , 1986 .

[3]  Diane M. Henderson,et al.  On the pinch-off of a pendant drop of viscous fluid , 1997 .

[4]  Jeffrey F. Morris,et al.  An experimental study of particle effects on drop formation , 2004 .

[5]  Alvin U. Chen,et al.  A new method for significantly reducing drop radius without reducing nozzle radius in drop-on-demand drop production , 2002 .

[6]  H. Le,et al.  Progress and Trends in Ink-jet Printing Technology , 1998, Journal of Imaging Science and Technology.

[7]  R. Schulkes,et al.  The contraction of liquid filaments , 1996, Journal of Fluid Mechanics.

[8]  D. Bogy.  Drop Formation in a Circular Liquid Jet , 1979 .

[9]  Howard A. Stone,et al.  Relaxation and breakup of an initially extended drop in an otherwise quiescent fluid , 1989, Journal of Fluid Mechanics.

[10]  J. E. Fromm,et al.  Numerical calculation of the fluid dynamics of drop-on-demand jets , 1984 .

[11]  J. F. Dijksman,et al.  Hydrodynamics of small tubular pumps , 1984, Journal of Fluid Mechanics.

[12]  Howard A. Stone,et al.  An experimental study of transient effects in the breakup of viscous drops , 1986, Journal of Fluid Mechanics.

[13]  T. Kowalewski,et al.  On the separation of droplets from a liquid jet , 1996 .

[14]  Brian Derby,et al.  Ink-jet delivery of particle suspensions by piezoelectric droplet ejectors , 2005 .

[15]  L. Creagh,et al.  Design and Performance of Inkjet Print Heads for Non-Graphic-Arts Applications , 2003 .

[16]  Osman A. Basaran,et al.  Small‐scale free surface flows with breakup: Drop formation and emerging applications , 2002 .

[17]  J. Keller.  Breaking of liquid films and threads , 1983 .

[18]  Osman A. Basaran,et al.  Dynamics and breakup of a contracting liquid filament , 2004, Journal of Fluid Mechanics.

[19]  R. Reitz,et al.  DROP AND SPRAY FORMATION FROM A LIQUID JET , 1998 .

[20]  J. Eggers,et al.  Universal pinching of 3D axisymmetric free-surface flow. , 1993, Physical review letters.

[21]  Qi Xu,et al.  Simplicity and complexity in a dripping faucet , 2005 .

[22]  M. Brenner,et al.  A Cascade of Structure in a Drop Falling from a Faucet , 1994, Science.

[23]  U. Schubert,et al.  Inkjet Printing of Polymers: State of the Art and Future Developments , 2004 .

[24]  Christian Rembe,et al.  Nonreproducible phenomena in thermal ink jets with real high-speed cine photomicrography , 1998, Other Conferences.

[25]  J. Eggers.  Nonlinear dynamics and breakup of free-surface flows , 1997 .

[26]  F. J. Kamphoefner.  Ink jet printing , 1972 .

[27]  Christian Rembe,et al.  Real-cinematographic visualization of droplet ejection in thermal ink jets , 1996, Electronic Imaging.

[28]  L. Rayleigh.  On The Instability Of Jets , 1878 .

[29]  R. L. Adams,et al.  A One-Dimensional Numerical Model of a Drop-On-Demand Ink Jet , 1986 .

[30]  Diane M. Henderson,et al.  The motion of a falling liquid filament , 2000 .

[31]  P. Calvert.  Inkjet Printing for Materials and Devices , 2001 .