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Title: Contact line friction of electrowetting actuated viscous droplets
Authors: Vo, Quoc
Tran, Tuan
Keywords: Contact Line Dynamics
Issue Date: 2018
Source: Vo, Q., & Tran, T. (2018). Contact line friction of electrowetting actuated viscous droplets. Physical Review E, 97(6), 63101-.
Series/Report no.: Physical Review E
Abstract: We examine the contact line friction coefficient of viscous droplets spreading and retracting on solid surfaces immersed in ambient oil. By using the electrowetting effect, we generate a surface tension imbalance to drive the spreading and the retracting motion of the three-phase contact line (TCL). We show that neither the driving force intensity nor TCL direction significantly influences the friction coefficient. Instead, the friction coefficient depends equivalently on the viscosity of liquid droplets and the surrounding oil. We derive and experimentally verify a transient timescale that can be used to characterize both the spreading and retracting dynamics.
ISSN: 2470-0045
DOI: 10.1103/PhysRevE.97.063101
Rights: © 2018 American Physical Society. This paper was published in Physical Review E and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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