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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 52, 2007 - Issue 9
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Original Articles

Liquid Ejection Characteristics of Piezoelectric Inkjet Printhead for Varied Work Liquids

&
Pages 777-793 | Received 09 Apr 2006, Accepted 01 Mar 2007, Published online: 14 Sep 2007
 

Abstract

This research applied computational fluid dynamics in the study of liquid ejection characteristics of a piezoelectric inkjet printhead for varied work liquids. The results of the fixed work liquid viscosity coefficient and the change of surface tension showed that larger surface tension increases the flying speed of the ejected droplet, but irregularity may occur if the viscosity coefficient is too small. Also, given fixed surface tension of the work liquid and changed viscosity coefficient, larger viscosity coefficient increases the tendency of the liquid surface in the nozzle to move toward the pressure chamber, and decreases the flying speed of the ejected droplet. When the nozzle diameter is changed, smaller nozzle diameter produces faster ejected droplet flying speed.

The authors extend cordial thanks to Dr. J.-C. Yang, ITRI, Taiwan, for his assistance to this research.

Notes

Remarks:

1. The work liquid is water.

2. The work liquid is ink.

3. The computational cycle starts from 100–144 µs of the triangular wave according to Figure .

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