Dynamic Behavior and Interaction Mechanisms of Double-Bubbles Near a Rigid Wall

LIU Yue; MA Tianbao; XIE Jing

doi:10.12382/bgxb.2025.0640

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Dynamic Behavior and Interaction Mechanisms of Double-Bubbles Near a Rigid Wall

更新时间：2026-02-16

- Dynamic Behavior and Interaction Mechanisms of Double-Bubbles Near a Rigid Wall
- Acta Armamentarii (2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0640
  CLC： 0383.1
- Received：11 July 2025，
  
  Online First：13 February 2026，
- 稿件说明：
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刘玥，马天宝，谢晶. 刚性壁面附近双气泡动力学行为及相互作用规律[J/OL]. 兵工学报, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0640.

LIU Y, MA T B, XIE J. Dynamic behavior and interaction mechanisms of double-bubbles near a rigid wall[J/OL]. Acta Armamentarii, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0640. (in Chinese)
刘玥，马天宝，谢晶. 刚性壁面附近双气泡动力学行为及相互作用规律[J/OL]. 兵工学报, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0640. DOI：

LIU Y, MA T B, XIE J. Dynamic behavior and interaction mechanisms of double-bubbles near a rigid wall[J/OL]. Acta Armamentarii, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0640. (in Chinese) DOI：

摘要

在实际水下爆炸环境中，边界条件的多样性对气泡动力学行为有显著影响，尤其是靠近刚性壁面的气泡，其坍塌过程会因壁面效应加剧，形成高速射流，对周围结构造成更强冲击。采用欧拉–拉格朗日耦合（Coupled Eulerian–Lagrangian

CEL）算法，对水下爆炸中刚性壁面附近双气泡系统在平行壁面与垂直壁面构型下的演化特性进行了数值模拟研究，并通过与单气泡实验数据对比验证了模型的有效性。结果表明，无量纲气泡壁面间隙参数

和双气泡间距参数

对气泡形态及射流行为具有关键影响。当

较小时，气泡更易被壁面吸附并在其上收缩坍塌，而

>0.5时气泡不再贴附壁面；

越小，气泡越易融合并产生强射流，融合临界值约为

=0.6。进一步分析显示，平行壁面构型下

=0.4时气泡融合后射流速度显著提升，增幅达30%~50%；而在垂直壁面构型中，

1时气泡间距越大射流速度越高。本文的研究结论有助于加强对气泡行为的预测，从而更好地评估潜在的结构损伤风险，对于设计防护措施以减轻水下爆炸对结构的潜在损害具有重要意义。

Abstract

In real underwater explosion environments

the diversity of boundary conditions significantly influences bubble dynamics. In particular

bubbles near rigid walls experience intensified collapse due to wall effects

leading to the formation of high-speed jets that impose stronger impacts on surrounding structures.This study employs the Coupled Eulerian–Lagrangian (CEL)algorithmto simulate the evolution of a double-bubble system near rigid walls in underwater explosions

considering both parallel and perpendicular configurations. The validity of the model was verified by comparison with experimental data from

single-bubble cases.The results show that the dimensionless bubble-wall gap parameter

and the inter-bubble spacing parameter

play critical roles in bubble morphology and jet behavior. When α is small

bubbles tend to adhere to the wall and collapse against it; when

> 0.5

bubbles no longer attach to the wall. As

decreases

bubbles are more likely to merge and generate strong jets

with a critical merging threshold at approximately

= 0.6. Further analysis reveals that under the parallel wall configuration

when

= 0.4

jet velocity significantly increases after bubble merging

with an enhancement of 30%–50%. In contrast

in the perpendicular wall configuration

for

larger inter-bubble distances lead to higher jet velocities.The findings of this study contribute to a better understanding and prediction of bubble behavior

thereby improving the assessment of potential structural damage risks. This has important implications for the design of protective measures to mitigate the destructive effects of underwater explosions on structures.

关键词

Keywords

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