Modelling droplet sliding angle on hydrophobic wire screens

Modelling droplet sliding angle on hydrophobic wire screens Colloids and Surfaces A 538 (2018) 310–319 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper ,1 D.G. Venkateshan, H. Vahedi Tafreshi Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284-3015, United States GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: This work presents a detailed investigation of the droplet lower and upper contact angles on hydrophobic wire Hydrophobic screen screens with different properties such as wire diameter, wire spacing, or Young–Laplace contact angle. Contact angle Numerical simulation and experiment were considered to better our understanding of the factors impacting Sliding angle droplet sliding on a hydrophobic screen, and to quantify their importance. To conduct the numerical simula- Wetting tions, the screens’ geometry was programed in the Surface Evolver code, and the droplet shape was obtained by Droplet minimizing the total energy of the droplet–screen system iteratively using the code’s finite element solver. Good general agreement was observed between the results of our numerical simulations and experimental data. Most interestingly, it was observed that droplet sliding angle increases with increasing the wire spacing in screens with a given wire diameter. To explain this counterintuitive observation, detailed quantitative information is presented http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloids and Surfaces A: Physicochemical and Engineering Aspects Elsevier

Modelling droplet sliding angle on hydrophobic wire screens

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0927-7757
eISSN
1873-4359
D.O.I.
10.1016/j.colsurfa.2017.11.003
Publisher site
See Article on Publisher Site

Abstract

Colloids and Surfaces A 538 (2018) 310–319 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Research Paper ,1 D.G. Venkateshan, H. Vahedi Tafreshi Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284-3015, United States GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: This work presents a detailed investigation of the droplet lower and upper contact angles on hydrophobic wire Hydrophobic screen screens with different properties such as wire diameter, wire spacing, or Young–Laplace contact angle. Contact angle Numerical simulation and experiment were considered to better our understanding of the factors impacting Sliding angle droplet sliding on a hydrophobic screen, and to quantify their importance. To conduct the numerical simula- Wetting tions, the screens’ geometry was programed in the Surface Evolver code, and the droplet shape was obtained by Droplet minimizing the total energy of the droplet–screen system iteratively using the code’s finite element solver. Good general agreement was observed between the results of our numerical simulations and experimental data. Most interestingly, it was observed that droplet sliding angle increases with increasing the wire spacing in screens with a given wire diameter. To explain this counterintuitive observation, detailed quantitative information is presented

Journal

Colloids and Surfaces A: Physicochemical and Engineering AspectsElsevier

Published: Feb 5, 2018

References

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