Open Access

ARTICLE

Molecular Dynamics Simulation of Bubble Arrangement and Cavitation Number Influence on Collapse Characteristics

Shuaijie Jiang¹, Zechen Zhou¹, Xiuli Wang¹, Wei Xu², Wenzhuo Guo¹, Qingjiang Xiang^1,*

1 Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, 212013, China
2 School of Energy and Power Engineering, Jiangsu University, Zhenjiang, 212013, China

* Corresponding Author: Qingjiang Xiang. Email:

(This article belongs to the Special Issue: Multiphase Flow and Vortex Dynamics in Fluid Machinery)

Fluid Dynamics & Materials Processing 2025, 21(3), 471-491. https://doi.org/10.32604/fdmp.2025.059878

Received 18 October 2024; Accepted 05 February 2025; Issue published 01 April 2025

Abstract

In nature, cavitation bubbles typically appear in clusters, engaging in interactions that create a variety of dynamic motion patterns. To better understand the behavior of multiple bubble collapses and the mechanisms of inter-bubble interaction, this study employs molecular dynamics simulation combined with a coarse-grained force field. By focusing on collapse morphology, local density, and pressure, it elucidates how the number and arrangement of bubbles influence the collapse process. The mechanisms behind inter-bubble interactions are also considered. The findings indicate that the collapse speed of unbounded bubbles located in lateral regions is greater than that of the bubbles in the center. Moreover, it is shown that asymmetrical bubble distributions lead to a shorter collapse time overall.

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Keywords

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