NDLI: Numerical simulation of droplet impact on textured surfaces in a hybrid state

Content Provider	Springer Nature Link
Author	Wang, Liwei Zhang, Rui Zhang, Xiwen Hao, Pengfei
Copyright Year	2017
Abstract	High Weber number drops are found to undergo a Cassie-to-Wenzel transition on hydrophobic textured surfaces. Previous studies with many-body dissipative particle dynamics (MDPD) method were based on an absolute Cassie state, with no splash. Hence, an MDPD method was developed in this paper, which could simulate drop splashes in a hybrid state. Millimeter-sized drops on hydrophobic substrates were simulated with different solid fraction, and results were compared to experimental results using high-speed photography. The numerical spread diameter, contact time, and splash amount are matched with experiments. Results showed that hydrophobic substrates with lower solid fraction possess better water repellency as compared to those with similar apparent contact angle. However, the influence of the microstructure on superhydrophobic surfaces is much less than that on hydrophobic ones, and surfaces with lower solid fraction did not have better water repellency capabilities. It is believed that the MDPD method proposed in this study can effectively predict relationship between surface topography and water repellency of a material.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	21
Issue Number	4
e-ISSN	16134990
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-03-17
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	MDPD Droplet impact Cassie–Wenzel transition Contact time Engineering Fluid Dynamics Biomedical Engineering Analytical Chemistry Nanotechnology and Microengineering
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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