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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.
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Document Type: Research Article

Publication date: 2013-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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