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Experimental and Numerical Study of Coalescence Between Two Picoliter-Sized Droplets on a Solid Surface

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In liquid inkjet printing, a critical quality issue is coalescence between droplets on media surface. To control the coalescence processes, it is useful to study how parameters, including liquid property (density, viscosity and surface tension) and affinity between liquid and a solid surface (advancing and receding contact angle), affect to the processes. However, the effect of changes with the parameters in coalescence processes between picoliter-sized droplets is not studied minutely in previous reports.

This paper describes simulation results about deriving equations of the parameters for coalescence processes between two droplets and experimental results for verification of the simulation results under the condition, in which absorption of moisture and evaporation of droplets can be neglected. In our works, experimental and simulation results are almost consistent, and some of the equations can be applied to actual coalescence processes.

Document Type: Research Article

Publication date: January 1, 2013

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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