Droplet Generation and Piezoceramic Actuation of a Jetting Inker

2011 ◽  
Vol 480-481 ◽  
pp. 574-579
Author(s):  
Lue Zhang ◽  
Hong Hu ◽  
Yong Cao
Keyword(s):  
Numerical Simulation ◽  
Volume Of Fluid ◽  
Numerical Results ◽  
Droplet Generation ◽  
Phase Flow ◽  
Volume Of Fluid Method ◽  
Key Factors ◽  
Simulation Results

To reveal the jetting of fine drops, model of 2-phase flow between gas and liquid is offered based on volume of fluid method. Numerical simulation is launched for the droplet generation through narrow nozzle, and key factors are discussed. Aiming at the ink marking of defective dies in IC production, a jetting inker driven by piezoceramic stacks is developed. The actuation properties are derived; waveform of induced pressure at nozzle entrance is estimated, which coincides the numerical results. Performance of ink dot jetting is evaluated and simulation results are verified.

Numerical simulation of free ascension and coaxial coalescence of air bubbles using the volume of fluid method (VOF)

2018 ◽  
Vol 161 ◽  
pp. 47-59 ◽  
Author(s):  
W. Abbassi ◽  
S. Besbes ◽  
M. Elhajem ◽  
H. Ben Aissia ◽  
J.Y. Champagne
Keyword(s):  
Numerical Simulation ◽  
Volume Of Fluid ◽  
Air Bubbles ◽  
Volume Of Fluid Method

Study on the Principle of Yarn Splicing of Pneumatic Splicer Using Numerical Simulation

2012 ◽  
Vol 588-589 ◽  
pp. 1355-1358
Author(s):  
Xiao Xing ◽  
Guo Ming Ye
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Three Dimensional ◽  
Numerical Results ◽  
Simulation Results

During the splicing process of pneumatic splicer, the principle of yarn splicing is closely related to the flow field inside the splicing chamber. This paper presents a numerical simulation of the flow char-acteristics inside the splicing chamber of the pneumatic splicer. A three-dimensional grid and the realizable tur¬bulence model are used in this simulation. The numerical results of veloc¬ity vectors distribution inside the chamber are shown. Streamlines starting from the two air injectors are also acquired. Based on the simulation, the principle of yarn splicing of the pneumatic splicer is discussed. The airflow in the splicing chamber can be divided into three regions. In addition, the simulation results have well sup¬ported the principle of yarn splicing of pneumatic splicer claimed by the splicing chamber makers.

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