Work

Size effect on the coalescence-induced self-propelled droplet

Year: 2011

Type: article

Abstract: An analysis based on the energy conservation is presented for the self-propelled droplet during coalescence of two droplets of the same size over a superhydrophobic rough surface. The self-propelled behavior occurs only for the coalescence of droplets with a certain range of radius. An analytical relation is established among the coalescence-induced velocity, surface energy, viscous dissipation, and droplet size if gravity is negligible. The coalescence-induced velocity increases with increasing droplet size to a maximum and then decreases with the size, which is in good accord with the experimental observation reported in the literature.

Source: Applied Physics Letters

DOI: 10.1063/1.3553782

Authors: Feng-Chao Wang, Fuqian Yang, Ya-Pu Zhao

Institutions: Chinese Academy of Sciences, Institute of Mechanics, State Key Laboratory of Nonlinear Mechanics, University of Kentucky

Language: English

Topic: Surface Modification and Superhydrophobicity

Subfield: Surfaces, Coatings and Films

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G1828425977, 硅基纳米结构机械加载尺度效应与表征方法研究, G961784112