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Advances in Materials Science and Engineering
Volume 2016, Article ID 8409683, 7 pages
http://dx.doi.org/10.1155/2016/8409683
Research Article

Dynamic Wetting Behavior of Vibrated Droplets on a Micropillared Surface

School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received 25 September 2015; Revised 17 November 2015; Accepted 3 January 2016

Academic Editor: José L. Ocaña

Copyright © 2016 Zhi-hai Jia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The dynamical wetting behavior has been observed under vertical vibration of a water droplet placed on a micropillared surface. The wetting transition takes place under the different processes. In compression process, the droplet is transited from Cassie state to Wenzel state. The droplet undergoes a Wenzel-Cassie wetting transition in restoring process and the droplet bounces off from the surface in bouncing process. Meanwhile, the wetting and dewetting models during vibration are proposed. The wetting transition is confirmed by the model calculation. This study has potential to be used to control the wetting state.