Impulsively Induced Jets from Viscoelastic Films for High-Resolution Printing.

Publication Year
2018

Type

Journal Article
Abstract

Understanding jet formation from non-Newtonian fluids is important for improving the quality of various printing and dispensing techniques. Here, we use a laser-based nozzleless method to investigate impulsively formed jets of non-Newtonian fluids. Experiments with a time-resolved imaging setup demonstrate multiple regimes during jet formation that can result in zero, single, or multiple drops per laser pulse. These regimes depend on the ink thickness, ink rheology, and laser energy. For optimized printing, it is desirable to select parameters that result in a single-drop breakup; however, the strain-rate dependent rheology of these inks makes it challenging to determine these conditions a priori. Rather, we present a methodology for characterizing these regimes using dimensionless parameters evaluated from the process parameters and measured ink rheology that are obtained prior to printing and, so, offer a criterion for a single-drop breakup.

Journal
Phys Rev Lett
Volume
120
Issue
7
Pages
074501
Date Published
2018 Feb 16
ISSN Number
1079-7114
Alternate Journal
Phys Rev Lett
PMID
29542955