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Updated: Sep 14, 2025

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Cavitation-driven bubble evolution and load mechanisms in particle-wall multiphase interactions.

Yuxuan Deng1, Haiting Xi1, Zhentao Gu1

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Summary
This summary is machine-generated.

Cavitation bubble collapse near particles and surfaces generates intense pressure loads. Particle motion and proximity significantly alter bubble dynamics, affecting energy dissipation and acoustic emissions in fluid systems.

Keywords:
Bubble dynamicCavitationEnergy dissipationParticle-fluid interactionStructural response

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Area of Science:

  • Fluid Dynamics
  • Acoustics
  • Materials Science

Background:

  • Cavitation bubble dynamics are crucial for energy transfer in fluids.
  • Interactions between bubbles, particles, and boundaries influence fluid system performance.
  • Understanding these interactions is key for applications like acoustic erosion and sonochemistry.

Purpose of the Study:

  • To investigate the influence of particle motion and boundary proximity on cavitation bubble dynamics.
  • To analyze energy dissipation and load effects during bubble collapse.
  • To elucidate the mechanisms of cavitation-induced energy transfer.

Main Methods:

  • High-resolution numerical simulations were used.
  • Simulations covered a range of particle-bubble distances (0.5–1.2) and sinking velocities (0.3–1.8).
  • Bubble evolution, pressure loading, and energy transfer were analyzed.

Main Results:

  • Single particle collapse yields high-pressure water-jet impacts (>40 MPa).
  • Near-wall collapse produces bimodal pressure responses (~20 MPa) due to bubble rupture and micro-jetting.
  • Higher particle velocities suppress jet formation but increase acoustic radiation.

Conclusions:

  • Particle-bubble interactions modulate collapse behavior and reduce water-jet loading on boundaries.
  • Boundary conditions and particle kinematics dictate cavitation energy transfer.
  • Findings offer insights into fluid-structure interactions in erosion and sonochemical processes.