Numerical analysis on bubble coalescence characteristics of wetting surface

YANG Liuming; LIU Shicheng; PEI Zhiyong; KONG Xiangshao

doi:10.19693/j.issn.1673-3185.03267

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YANG L M, LIU S C, PEI Z Y, et al. Numerical analysis on bubble coalescence characteristics of wetting surface[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–11 (in Chinese). DOI: 10.19693/j.issn.1673-3185.03267

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Numerical analysis on bubble coalescence characteristics of wetting surface

1.
1Green & Smart River-Sea-Going Ship Cruise and Yacht Research Center, Wuhan University of Technology, Wuhan 430063, China
2.
Culture and Creative Design Center for Cruise Ship and Yacht, Sanya Science and Education Innovation Park of Wuhan University of Technology, Sanya 572025, China

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Received Date: November 02, 2023
Revised Date: December 23, 2023
Available Online: January 15, 2024

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

Abstract

Objectives
For the development of composite drag reduction technology of super-hydrophobic surface and bubbles, the coalescence characteristics of bubbles on wetting surface are studied.
Methods
Based on the volume of fluid (VOF) method, a numerical model of bubble coalescence on an underwater wetting surface is established. It is used to analyze the bubble coalescence characteristics on wetting surfaces and reveal the influence of surface wettability, bubble spacing and bubble size on bubble coalescence characteristics.
Results
The results show that the increase of surface contact angle on wetting surfaces and the decrease of bubble spacing make it easier for bubbles to coalesce. Increasing the bubble size will slow down the spreading speed of bubbles on the surface, which is also not conducive to accelerating bubble coalescence.
Conclusion
This study can provide a reference for the coupling design of super-hydrophobic surface and bubble drag reduction technology.

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