Size effect on the coalescence-induced self-propelled droplet

Feng Chao Wang; Fuqian Yang; Ya Pu Zhao

doi:10.1063/1.3553782

Size effect on the coalescence-induced self-propelled droplet

Feng Chao Wang, Fuqian Yang, Ya Pu Zhao

Research output: Contribution to journal › Article › peer-review

273 Scopus citations

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.

Original language	English
Article number	053112
Journal	Applied Physics Letters
Volume	98
Issue number	5
DOIs	https://doi.org/10.1063/1.3553782
State	Published - Jan 31 2011

Bibliographical note

Funding Information:
This work is jointly supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 60936001 and 11072244), the National Basic Research Program of China (973 Program, Grant No. 2007CB310500), and Opening Fund of State Key Laboratory of Nonlinear Mechanics.

Funding

This work is jointly supported by the National Natural Science Foundation of China (NSFC, Grant Nos. 60936001 and 11072244), the National Basic Research Program of China (973 Program, Grant No. 2007CB310500), and Opening Fund of State Key Laboratory of Nonlinear Mechanics.

Funders	Funder number
Opening Fund of State Key Laboratory of Nonlinear Mechanics
National Natural Science Foundation of China (NSFC)	11072244, 60936001
National Basic Research Program of China (973 Program)	2007CB310500

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3553782

Cite this

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AB - 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.

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Size effect on the coalescence-induced self-propelled droplet

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

UN SDGs

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