Contact line friction of electrowetting actuated viscous droplets
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)....
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/84743 http://hdl.handle.net/10220/45092 |
| _version_ | 1826124990265688064 |
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| author | Vo, Quoc Tran, Tuan |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Vo, Quoc Tran, Tuan |
| author_sort | Vo, Quoc |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T06:29:24Z |
| format | Journal Article |
| id | ntu-10356/84743 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:29:24Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/847432023-03-04T17:15:50Z Contact line friction of electrowetting actuated viscous droplets Vo, Quoc Tran, Tuan School of Mechanical and Aerospace Engineering Contact Line Dynamics Electrowetting 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. Published version 2018-07-17T03:06:52Z 2019-12-06T15:50:38Z 2018-07-17T03:06:52Z 2019-12-06T15:50:38Z 2018 Journal Article Vo, Q., & Tran, T. (2018). Contact line friction of electrowetting actuated viscous droplets. Physical Review E, 97(6), 63101-. 2470-0045 https://hdl.handle.net/10356/84743 http://hdl.handle.net/10220/45092 10.1103/PhysRevE.97.063101 en Physical Review E © 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: [http://dx.doi.org/10.1103/PhysRevE.97.063101]. 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. 6 p. application/pdf |
| spellingShingle | Contact Line Dynamics Electrowetting Vo, Quoc Tran, Tuan Contact line friction of electrowetting actuated viscous droplets |
| title | Contact line friction of electrowetting actuated viscous droplets |
| title_full | Contact line friction of electrowetting actuated viscous droplets |
| title_fullStr | Contact line friction of electrowetting actuated viscous droplets |
| title_full_unstemmed | Contact line friction of electrowetting actuated viscous droplets |
| title_short | Contact line friction of electrowetting actuated viscous droplets |
| title_sort | contact line friction of electrowetting actuated viscous droplets |
| topic | Contact Line Dynamics Electrowetting |
| url | https://hdl.handle.net/10356/84743 http://hdl.handle.net/10220/45092 |
| work_keys_str_mv | AT voquoc contactlinefrictionofelectrowettingactuatedviscousdroplets AT trantuan contactlinefrictionofelectrowettingactuatedviscousdroplets |