Near-wall double-bubble collapse dynamics and their impact-strengthening role in cavitation-assisted ultrasonic surface rolling

Authors

  • Hongbo Li College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China Phone: +86-391-3987511 , Henan Polytechnic University image/svg+xml
  • Jianxin Zheng College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China , Henan Polytechnic University image/svg+xml
  • Xiao Yu College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China , Henan Polytechnic University image/svg+xml
  • Junhua Li College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China , Henan Polytechnic University image/svg+xml
  • Yanyan Yan College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China , Henan Polytechnic University image/svg+xml
  • Shen Niu College of Mechanical & Power Engineering, Henan Polytechnic University, Jiaozuo 454003, Henan Province, China , Henan Polytechnic University image/svg+xml

DOI:

https://doi.org/10.15282/jmes.20.2.2026.4.0872

Keywords:

Ultrasonic surface rolling, Cavitation effect, Double-bubble, Shock wave pressure, Dynamical model

Abstract

Ultrasonic Surface Rolling (USR) is a surface deformation strengthening technology. By introducing cavitation effects into USR, the extreme high-pressure shock waves generated by the collapse of microscale bubbles can further enhance the surface strengthening effect. However, the synergistic mechanism governing near-wall double-bubble collapse in cavitation assisted USR remains unclear, limiting further optimization of the cavitation strengthening effect. This study investigates the dynamic behavior and synergistic mechanism of near-wall spherical double-bubble collapse in cavitation assisted USR through a combined numerical and experimental approach. A coupled dynamic model for spherical double bubbles and a shock wave pressure propagation model for the rolling region were developed and validated against cavitation assisted USR experiments. The results indicate that when double-bubble collapses, its synergistic effect increases the peak impact pressure by 23.6% compared to single-bubble. Analysis of the parameters reveals that the wall impact pressure is related to initial bubble radius, ultrasonic amplitude, dimensionless distance, and inter-bubble distance. This study has clarified the synergistic mechanism of the near-wall double-bubble collapse, providing theoretical support for controllably utilizing the cavitation effects in USR.

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Published

2026-06-30

Issue

Volume 20 No. 2, (June 2026)

Section

Article

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Copyright (c) 2026 The Author(s)

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

[1]
H. Li, J. Zheng, X. Yu, J. Li, Y. Yan, and S. Niu, “Near-wall double-bubble collapse dynamics and their impact-strengthening role in cavitation-assisted ultrasonic surface rolling”, J. Mech. Eng. Sci., vol. 20, no. 2, pp. 11178–11193, Jun. 2026, doi: 10.15282/jmes.20.2.2026.4.0872.

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