Numerical and experimental comparisons of mass transport rate in a piezoelectric drop-on-demand inkjet print head

2004 ◽  
Vol 46 (2) ◽  
pp. 181-199 ◽  
Author(s):  
Dong-Youn Shin ◽  
Paul Grassia ◽  
Brian Derby
Keyword(s):  
Mass Transport ◽  
Transport Rate ◽  
Print Head ◽  
On Demand ◽  
Drop On Demand ◽  
Mass Transport Rate ◽  
Experimental Comparisons

scholarly journals Enhancing Droplet Quality of Edible Ink in Single and Multi-Drop Methods by Optimization the Waveform Design of DoD Inkjet Printer

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 91
Author(s):  
Oke Oktavianty ◽  
Shigeyuki Haruyama ◽  
Yoshie Ishii
Keyword(s):  
Waveform Design ◽  
Optimum Range ◽  
Print Head ◽  
On Demand ◽  
Drop On Demand ◽  
Grey Scale ◽  
Lower Viscosity ◽  
Inkjet Printer ◽  
Ejection Method

The multi-drop method with a good droplet quality is a big challenge in inkjet technology. In this study, optimization of Drop on Demand (DoD) inkjet printer waveform design was conducted. The effectiveness of the waveform design, so-called W waveform, from previous study as a preliminary vibration for the multi-drop ejection method was investigated. The unmodified W waveform was proven not to be an effective waveform for lower viscosity of liquid, especially when compared by the standard waveform obtained from a print-head manufacturer. Edible ink with a viscosity below the optimum range for print-head specifications was employed as the operating liquid. The preliminary vibration W waveform was modified to improve the droplet quality of the edible ink. It was proven that a 40% adjusted voltage of the rear wave of the W waveform was effective as the optimum waveform design for edible ink. The droplet quality of the multi-drop ejection method for grey-scale technology was improved by optimizing the W waveform design.

New methodology for the determination of mass transport rate from rotating disks and/or cylinders in liquid

1994 ◽  
Vol 65 (2) ◽  
pp. 58-64
Author(s):  
Yoshimoto Wanibe ◽  
Esther Boschatzke ◽  
Franz Oeters ◽  
Takashi Itoh
Keyword(s):  
Mass Transport ◽  
Transport Rate ◽  
Rotating Disks ◽  
Mass Transport Rate

Enhancement of mass transport and separation of species by oscillatory electroosmotic flows

2006 ◽  
Vol 462 (2071) ◽  
pp. 2017-2038 ◽  
Author(s):  
Hsin-Fu Huang ◽  
Chun-Liang Lai
Keyword(s):  
Mass Transport ◽  
Oscillation Frequency ◽  
Total Mass ◽  
Debye Length ◽  
Transport Rate ◽  
Two Dimensional ◽  
Womersley Number ◽  
Dispersion Effects ◽  
Mass Transport Rate ◽  
Electroosmotic Flows

Mass transport driven by oscillatory electroosmotic flows (EOF) in a two-dimensional micro-channel is studied theoretically. The results indicate that the velocity and concentration distributions across the channel-width become more and more non-uniform as the Womersley number W , or the oscillation frequency, increases. It is also revealed that, with a constant tidal displacement, the total mass transport rate increases with the Womersley number W due to both the stronger convective and the transverse dispersion effects. The total mass transport rate also increases with the tidal displacement (with a fixed oscillation frequency) because of the associated stronger convective effects. The cross-over phenomenon of the mass transport rates for different species becomes possible with sufficiently large Debye lengths and at sufficiently large values of W . Consequently, with proper choices of the Debye length, oscillation frequency and tidal displacement, oscillatory EOF may become a good candidate for the first-step separation of the mass species.

scholarly journals Plume dynamics in Hele-Shaw porous media convection

2016 ◽  
Vol 374 (2078) ◽  
pp. 20150420 ◽  
Author(s):  
Robert E. Ecke ◽  
Scott Backhaus
Keyword(s):  
Porous Media ◽  
Mass Transport ◽  
Molecular Diffusion ◽  
Spatial Separation ◽  
Transport Rate ◽  
Plume Dynamics ◽  
Variable Permeability ◽  
Mass Transport Rate ◽  
Laboratory Analogue ◽  
Hele Shaw Cell

Mass transport in multi-species porous media is through molecular diffusion and plume dynamics. Predicting the rate of mass transport has application in determining the efficiency of the storage and sequestration of carbon dioxide. We study a water and propylene–glycol system enclosed in a Hele-Shaw cell with variable permeability that represents a laboratory analogue of the general properties of porous media convection. The interface between the fluids, tracked using an optical shadowgraph technique, is used to determine the mass transport rate, the spatial separation of solutal plumes, and the velocity and width characteristics of those plumes. One finds that the plume dynamics are closely related to the mass transport rate. This article is part of the themed issue ‘Energy and the subsurface’.

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