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
Colloids and Surfaces A: Physicochemical and Engineering Aspects – Elsevier
Published: Feb 5, 2018
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