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

TitleImpulsively Induced Jets from Viscoelastic Films for High-Resolution Printing.
Publication TypeJournal Article
Year of Publication2018
AuthorsTurkoz, E, Perazzo, A, Kim, H, Stone, HA, Arnold, CB
JournalPhys Rev Lett
Date Published2018 Feb 16

<p>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.</p>

Alternate JournalPhys Rev Lett
PubMed ID29542955