Shock wave and temperature induced by bubble collapse and rebound: Numerical and experimental study*

Cavitation and the collapse of cavitation bubbles have broad implications in areas beyond cavitation erosion, serving as valuable sources of energy for surface cleaning, material processing, biotechnology, and biomedical applications. The generation of high-speed jets, shock waves, and thermal effects during bubble collapses offers opportunities for controlled and specialized treatments. However, the validation of numerical simulations against experimental data, especially regarding thermodynamics, shock waves, and their amplitudes, remains limited. The evaluation of acoustic pressure and thermodynamics is challenging, resulting in a lack of comprehensive studies in this field. In this study, we conducted a thorough numerical investigation using a conservative, compressible multiphase flow model to examine the collapse and rebound of cavitation bubbles. The experiments on bubble collapse near a wall were conducted to provide support for the reliability of the numerical results. By analyzing both freefield and near-wall scenarios, our research provides valuable insights into the behavior of cavitation bubbles and the influence of standoff distance on the bubble dynamics of the jets, temperature, shock wave, and their impact on the wall.