3D simulation of micro droplet impact on the structured superhydrophobic surface

When a liquid droplet impacts a superhydrophobic surface with anisotropic surface patterning in the form of alternating ribs and cavities, the rebounding droplet may exhibit a unique two-pronged jet emission. Droplet impact experiments with 11 different fluids of viscosity that varied by more than three orders of magnitude were conducted, and this paper quantifies the Capillary number, Ca, and Ohnesorge number, Oh, ranges over which the two-pronged phenomenon occurs. For Oh > 0.0154, the behavior was never observed, while at lower values of Oh, the behavior occurs for an intermediate range of Ca that depends on Oh.

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Numerical investigation of droplet impact on a solid superhydrophobic surface

Physics of Fluids ◽

10.1063/5.0050378 ◽

2021 ◽

Vol 33 (6) ◽

pp. 063310

Author(s):

Wen Li ◽

Jingxin Wang ◽

Chuling Zhu ◽

Linlin Tian ◽

Ning Zhao

Keyword(s):

Numerical Investigation ◽

Superhydrophobic Surface ◽

Droplet Impact

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Dynamic Behavior of the Water Droplet Impact on a Textured Hydrophobic/Superhydrophobic Surface: The Effect of the Remaining Liquid Film Arising on the Pillars' Tops on the Contact Time

Langmuir ◽

10.1021/la903603z ◽

2010 ◽

Vol 26 (7) ◽

pp. 4831-4838 ◽

Cited By ~ 83

Author(s):

Xiying Li ◽

Xuehu Ma ◽

Zhong Lan

Keyword(s):

Liquid Film ◽

Dynamic Behavior ◽

Water Droplet ◽

Contact Time ◽

Superhydrophobic Surface ◽

Droplet Impact

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Two-Pronged Jet Formation Caused by Droplet Impact on Anisotropic Superhydrophobic Surfaces

Volume 1B, Symposia: Fluid Machinery; Fluid Power; Fluid-Structure Interaction and Flow-Induced Noise in Industrial Applications; Flow Applications in Aerospace; Flow Manipulation and Active Control: Theory, Experiments and Implementation; Fundamental Issues and Perspectives in Fluid Mechanics ◽

10.1115/fedsm2013-16629 ◽

2013 ◽

Cited By ~ 1

Author(s):

John T. Pearson ◽

Daniel Maynes ◽

David Bilodeau ◽

Brent W. Webb

Keyword(s):

Superhydrophobic Surface ◽

Liquid Droplet ◽

Droplet Impact ◽

Surface Patterning ◽

Superhydrophobic Surfaces ◽

Ohnesorge Number ◽

Jet Formation ◽

Anisotropic Surface ◽

Impact Experiments ◽

Droplet Impacts

When a liquid droplet impacts a superhydrophobic surface with anisotropic surface patterning in the form of alternating ribs and cavities, the rebounding droplet may exhibit a unique two-pronged jet emission. Droplet impact experiments with eleven different fluids of viscosity that varied by more than three orders of magnitude were conducted, and this paper quantifies the Capillary number, Ca, and Ohnesorge number, Oh, ranges over which the two-pronged phenomenon occurs. For Oh > 0.0154, the behavior was never observed, while at lower values of Oh, the behavior occurs for an intermediate range of Ca that depends on Oh.

Download Full-text