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：2026-06-16

- Dynamic Behavior and Interaction Mechanisms of Double Bubbles near a Rigid Wall
- Acta Armamentarii Vol. 47, Issue 5, Pages: 250640(2026)
- 作者机构：
  
  北京理工大学爆炸科学与安全防护全国重点实验室，北京 100081
  北京理工大学唐山研究院，河北唐山 063000
  北京理工大学长三角研究院，浙江嘉兴 314019
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0640
  CLC： O383.1
- Received：11 July 2025，
  
  Online First：13 February 2026，
  
  Published：2026-05
- 稿件说明：
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LIU Yue, MA Tianbao, XIE Jing. Dynamic Behavior and Interaction Mechanisms of Double Bubbles near a Rigid Wall[J]. Acta Armamentarii, 2026, 47(5): 250640.
DOI：

LIU Yue, MA Tianbao, XIE Jing. Dynamic Behavior and Interaction Mechanisms of Double Bubbles near a Rigid Wall[J]. Acta Armamentarii, 2026, 47(5): 250640. DOI： 10.12382/bgxb.2025.0640.

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

；θ

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 the real underwater explosion environments，the diversity of boundary conditions has a significant influence on bubble dynamics. In particular，the bubbles near rigid wall experience intensified collapse due to wall effects，leading to the formation of high-speed jets that impose stronger impacts on surrounding structures. The evolution of a double-bubble system near a rigid wall in underwater explosions is simulated using the coupled Eulerian-Lagrangian（CEL）algorithm，considering both parallel and perpendicular configurations. The validity of the model is verified by comparison with the experimental data from single-bubble cases. The results show that the dimensionless bubble-wall gap parameter

and the inter-bubble spacing parameter

have a crucial influence on bubble morphology and jet behavior. The bubbles tend to be adhered to the wall and collapse against it when

is small，and they are no longer adhered to the wall for

＞0.5.As

decreases，the bubbles are more likely to merge and generate strong jets，with a critical merging threshold being approximately

=0.6. Further analysis reveals that，the jet velocity after bubble merging is increased by 30%～50% under the parallel wall configuration for

=0.4. In contrast，The larger inter-bubble distances lead to higher jet velocities in the perpendicular wall configuration for

＜1.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 designing the protective measures

to mitigate the destructive effects of underwater explosions on structures.

关键词

Keywords

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Related Author

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Related Institution

School of Civil Engineering, Institute of Disaster Prevention

Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology

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State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA

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