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Title: Droplet ejection by electrowetting actuation
Authors: Vo, Quoc
Tran, Tuan
Keywords: Engineering::Mechanical engineering
Issue Date: 2021
Source: Vo, Q. & Tran, T. (2021). Droplet ejection by electrowetting actuation. Applied Physics Letters, 118(16), 161603-.
Project: 1523700102
Journal: Applied Physics Letters
Abstract: Fast contact-line motion of a droplet spreading on a solid substrate under the electrowetting effect generates strong capillary waves on the droplet's surface. The capillary waves may be strong enough to induce ejection of a satellite droplet from the primary one. In this study, we show that the size of the satellite droplet and the ejection time are not only dependent on the contact-line velocity, which directly relates to the applied voltage enabling the electrowetting effect, but also affected by the ejection dynamics. We derive a theoretical model of the criteria for droplet ejection and experimentally verify the proposed criteria for wide ranges of viscosity, droplet size and the applied voltage.
ISSN: 0003-6951
DOI: 10.1063/5.0044500
Rights: © 2021 Author(s). All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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