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research-article

Influence of the nozzle shape on the breakup behavior of continuous ink jets

[+] Author and Article Information
Maxime Rosello

Laboratoire Rhéologie et Procédés, Univ. Grenoble Alpes, LRP, F-38000 Grenoble, France, CNRS, LRP, F-38000 Grenoble, France
maxime.rosello@ujf-grenoble.fr

Guillaume Maîtrejean

Laboratoire Rhéologie et Procédés, Univ. Grenoble Alpes, LRP, F-38000 Grenoble, France, CNRS, LRP, F-38000 Grenoble, France
guillaume.maitrejean@univ-grenoble-alpes.fr

Denis C D Roux

Laboratoire Rhéologie et Procédés, Univ. Grenoble Alpes, LRP, F-38000 Grenoble, France, CNRS, LRP, F-38000 Grenoble, France
denis.roux@univ-grenoble-alpes.fr

Pascal Jay

Laboratoire Rhéologie et Procédés, Univ. Grenoble Alpes, LRP, F-38000 Grenoble, France, CNRS, LRP, F-38000 Grenoble, France
pascal.jay@univ-grenoble-alpes.fr

Bruno Barbet

Markem-Imaje Industries, ZA de l'Armailler, 9, rue Gaspard Monge, 26501 Bourg-Lés-Valence, France
bbarbet@markem-imaje.com

Jean Xing

Markem-Imaje Industries, ZA de l'Armailler, 9, rue Gaspard Monge, 26501 Bourg-Lés-Valence, France
jxing@markem-imaje.com

1Corresponding author.

ASME doi:10.1115/1.4037691 History: Received November 18, 2016; Revised August 08, 2017

Abstract

In the present work, the influence of nozzle shape on microfluidic ink jet breakup is investigated. First, an industrial ink used in continuous inkjet printing devices is selected. Ink rheological properties are measured to ensure an apparent Newtonian behavior and a constant surface tension. Then, breakup lengths and shapes are observed on a wide range of disturbance amplitude for four different nozzles. Later on, ink breakup behaviors are compared to the linear theory. Finally, these results are discussed using numerical simulations to highlight the influence of the velocity profiles at the nozzle outlet. Using such computations, a simple approach is derived to accurately predict the breakup length for industrial CIJ nozzles.

Copyright (c) 2017 by ASME
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