4.7 Article

Contact angles and movement of air bubbles on bioinspired conical surfaces

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 577, Issue -, Pages 530-541

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.05.079

Keywords

Bioinspiration; Air bubble; Cone; Contact angle; Laplace pressure gradient; Wettability

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Air bubbles are of interest in various applications. The study of their formation, interaction with underlying surfaces, and their movement is of importance. Bioinspired conical surfaces have been known to exhibit Laplace pressure gradient which facilitates the movement of liquid droplets. These conical surfaces, with various geometries and wettabilities, can be used to regulate gas bubble movement. In this study, contact angles of air bubbles and their movement on various conical surfaces were investigated. The effect of parameters including cone orientation, air bubble volume, tip angle, and wettability on air bubble movement were studied. A smaller tip angle cone with high wettability was found to be most efficient for an air bubble movement. (C) 2020 Elsevier Inc. All rights reserved.

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