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A novel method to produce small droplets from large nozzles.

Castrejón-Pita, AA and Castrejón-Pita, JR and Martin, GD (2012) A novel method to produce small droplets from large nozzles. Rev Sci Instrum, 83. 115105-.

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Abstract

This work presents a new method to generate droplets with diameters significantly smaller than the nozzle from which they emerge. The electrical waveform used to produce the jetting consists of a single square negative pulse. The negative edge of the pressure wave pulls the meniscus in, overturning the surface in such a way that a cavity is created. This cavity is then forced to collapse under the action of the positive edge of the pressure wave. This violent collapse produces a thin jet that eventually breaks up and produces droplets. Four droplet generator prototypes that demonstrate the capabilities of this novel mechanism are described. It is also shown that the proposed mechanism extends the existing limits of the commonly accepted inkjet operating regime.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:29
Last Modified: 05 May 2014 01:09
DOI: 10.1063/1.4766886

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