Abstract:
Bubble collapse represents a fundamental problem in bubble dynamics, characterized by its intricate physical mechanisms and wide-ranging engineering implications. Recent studies have extensively focused on the collapse of cavitation bubbles near solid boundaries and the resulting erosion phenomena, driven by their unique nonlinear dynamics and potential applications in fields such as biomedical engineering and hydraulic systems. However, the transient and highly complex nature of this phenomenon poses significant challenges for traditional pedagogical approaches, which often fail to provide an intuitive understanding of the underlying physics. To address this limitation, we propose an integrated teaching framework that combines theoretical analysis with experimental visualization. This approach engages students directly in the experimental process, fostering a deeper comprehension of the physical principles involved. Specifically, a laser-induced cavitation system was utilized to generate bubbles near solid boundaries. The combination of high-speed imaging, a shock wave shadowgraph observation system, PCC software, and a micro-depth-of-field microscope enabled real-time visualization and quantitative analysis of the collapse dynamics and wall erosion. This methodology not only elucidates the evolution of bubble collapse but also provides insights into the associated flow structures and pressure fields.