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Issue 77, 2017
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Dynamics of a water droplet on a hydrophobic inclined surface: influence of droplet size and surface inclination angle on droplet rolling

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Abstract

An understanding of the dynamic motion of a water droplet is critical to reduce the effort required to remove dust particles from such surfaces. In line with self-cleaning applications, the wobbling and geometric variations of a rolling droplet were experimentally assessed for various droplet sizes. Furthermore, the internal fluidity of a rolling droplet was numerically predicted. The findings revealed that the rotational Bond number influenced the droplet wobbling due to adhesion force variations during rolling. Small-sized droplets, which were comparable to the capillary length, resulted in higher rotational speeds than those of larger-sized droplets. The ability to alter the rolling characteristics of droplets on inclined hydrophobic surfaces could address the limitations of self-cleaning surfaces and has implications for efficiency enhancements in solar energy devices.

Graphical abstract: Dynamics of a water droplet on a hydrophobic inclined surface: influence of droplet size and surface inclination angle on droplet rolling

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Article information


Submitted
23 Aug 2017
Accepted
12 Oct 2017
First published
17 Oct 2017

This article is Open Access

RSC Adv., 2017,7, 48806-48818
Article type
Paper

Dynamics of a water droplet on a hydrophobic inclined surface: influence of droplet size and surface inclination angle on droplet rolling

B. S. Yilbas, A. Al-Sharafi, H. Ali and N. Al-Aqeeli, RSC Adv., 2017, 7, 48806
DOI: 10.1039/C7RA09345D

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