Velocity Profile inside Piezoacoustic Inkjet Droplets in Flight: Comparison between Experiment and Numerical Simulation

Bos, Arjan van der; Meulen, Mark-Jan van der; Driessen, Theo; Berg, Marc van den; Reinten, Hans; Wijshoff, Herman; Versluis, Michel; Lohse, Detlef

doi:10.1103/physrevapplied.1.014004

Cited by 111 publications

(82 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simultaneous measurements of the outermost droplets were unfortunately impossible, as their side view was obscured by the surrounding droplets, prohibiting the accurate contact angle determination required for volumetric measurements. The images obtained were post-processed in Matlab to extract the profile with sub-pixel accuracy 11 . Other experiments were carried out as well to provide a top view of the droplet pattern.…”

Section: Methodsmentioning

confidence: 99%

Collective and convective effects compete in patterns of dissolving surface droplets

Laghezza¹,

Dietrich

Yeomans³

et al. 2016

Soft Matter

Self Cite

View full text Add to dashboard Cite

Detlef (2016) Collective and convective effects compete in patterns of dissolving surface droplets. Soft Matter, 12 (26 Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) This is an Accepted Manuscript, which has been through the Royal Society of Chemistry peer review process and has been accepted for publication.Accepted Manuscripts are published online shortly after acceptance, before technical editing, formatting and proof reading. Using this free service, authors can make their results available to the community, in citable form, before we publish the edited article. We will replace this Accepted Manuscript with the edited and formatted Advance Article as soon as it is available.You can find more information about Accepted Manuscripts in the Information for Authors. The effect of neighboring droplets on the dissolution of a sessile droplet, i.e. collective effects, are investigated both experimentally and numerically. On the experimental side small 20 n approximately mono-disperse surface droplets arranged in an ordered pattern were dissolved and their size evolution is studied optically. The droplet dissolution time was studied for various droplet patterns. On the numerical side, Lattice-Boltzmann simulations were performed. Both simulations and experiments show that the dissolution time of a droplet placed in the center of a pattern can increase with as much as 60% as compared to a single, isolated droplet, due to the shielding effect of the neighboring droplets. However, the experiments also show that neighboring droplets enhance the buoyancy driven convective flow of the bulk, increasing the mass exchange and counteracting collective effects. We show that this enhanced convection can reduce the dissolution time of droplets at the edges of the pattern to values below that of a single, isolated droplet.

show abstract

Section: Methodsmentioning

confidence: 99%

Collective and convective effects compete in patterns of dissolving surface droplets

Laghezza¹,

Dietrich

Yeomans³

et al. 2016

Soft Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Rayleigh-Plateau instability is approximated in the slender-jet approximation (Eggers & Dupont 1994;Eggers & Villermaux 2008), which is a systematic reduction of the Navier-Stokes equation for an axisymmetric jet, and which has turned out to be extremely valuable in inkjet printing, cf. Ambravaneswaran, Wilkes & Basaran (2002), van Hoeve et al Driessen et al (2013) and van der Bos et al (2014). There are also cases in inkjet printing where a more advanced model is necessary, such as the case when the meniscus retracts into the nozzle, see e.g.…”

Section: Linear Theorymentioning

confidence: 97%

“…To experimentally determine these parameters, we first determine the jet contour of the recorded jet with subpixel accuracy (van der Bos et al 2014). It should be noted that the contour that we determine in this way has an a priori unknown offset normal to the real liquid interface.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Control of jet breakup by a superposition of two Rayleigh–Plateau-unstable modes

et al. 2014

Self Cite

View full text Add to dashboard Cite

We experimentally, numerically and theoretically demonstrate a novel method of producing a stream of widely spaced high-velocity droplets by imposing a superposition of two Rayleigh-Plateau-unstable modes on a liquid jet. The wavelengths of the two modes are chosen close to the wavelength of the most unstable mode. The interference pattern of the two superimposed modes causes local asymmetries in the capillary tension. The velocity of the initial droplets depends on these local asymmetries. Due to their different velocities, the droplets coalesce to produce a stream of larger droplets spaced at a much larger distance than the initial droplets. We analytically derive the perturbations that robustly induce this process and investigate the influence of the nonlinear interactions of the two Rayleigh-Plateau-unstable modes on the coalescence process. Experiments and numerical simulations demonstrate that the jet breakup and the subsequent droplet merging are fully governed by the selected modes.

show abstract

“…Numerical simulation approaches developed for inkjet printers to measure the velocities and volume profi les of droplets can be applied to e-jet printers. [ 76 ] Control approaches for the automatic operation of e-jet printers must be developed in large-scale manufacturing processes. Most work has been performed in laboratory environments where the processes are manually controlled by an operator in an open-loop manner.…”

Section: Modeling Studiesmentioning

confidence: 99%

Mechanisms, Capabilities, and Applications of High‐Resolution Electrohydrodynamic Jet Printing

Önses

Sutanto

Ferreira

et al. 2015

Small

482

397

View full text Add to dashboard Cite

This review gives an overview of techniques used for high-resolution jet printing that rely on electrohydrodynamically induced flows. Such methods enable the direct, additive patterning of materials with a resolution that can extend below 100 nm to provide unique opportunities not only in scientific studies but also in a range of applications that includes printed electronics, tissue engineering, and photonic and plasmonic devices. Following a brief historical perspective, this review presents descriptions of the underlying processes involved in the formation of liquid cones and jets to establish critical factors in the printing process. Different printing systems that share similar principles are then described, along with key advances that have been made in the last decade. Capabilities in terms of printable materials and levels of resolution are reviewed, with a strong emphasis on areas of potential application.

show abstract

Velocity Profile inside Piezoacoustic Inkjet Droplets in Flight: Comparison between Experiment and Numerical Simulation

Cited by 111 publications

References 26 publications

Collective and convective effects compete in patterns of dissolving surface droplets

Collective and convective effects compete in patterns of dissolving surface droplets

Control of jet breakup by a superposition of two Rayleigh–Plateau-unstable modes

Mechanisms, Capabilities, and Applications of High‐Resolution Electrohydrodynamic Jet Printing

Contact Info

Product

Resources

About