Fundamentals of Single Cavitation Bubble Dynamics

This brief provides a comprehensive review of the rapidly expanding field of cavitation and bubble dynamics, covering the discussion of bubble dynamics equations, bubble oscillation dynamics, theoretical prediction models of jets, and high-speed photography technology. Among them, the core formulas, important research methods, and typical results related to bubble oscillation and collapse dynamics are systematically and comprehensively introduced. Specifically, in terms of the bubble dynamics equations, several classical dynamic equations utilized to describe the radial motion of the spherical bubble, cylindrical bubble, and the bubble in a droplet are derived and compared. In terms of the bubble oscillation dynamics, based on the perturbation method, multi-scale method, and Laplace transform method, the nonlinear oscillation characteristics of the bubble in free oscillation and driven oscillation are analyzed. In terms of the jet prediction theory, the Kelvin impulse model and various boundary treatment methods are given in detail, and the jet direction, intensity, and spatial sensitivity caused by the bubble collapse near various boundaries are discussed. In terms of the bubble collapse visualization based on the high-speed photography, taking the laser-induced bubble as an example, the system composition, operation process and experimental layout of the high-speed photography experimental platform are introduced, and a large number of typical bubble collapse deformation, jet evolution and shock wave propagation characteristics obtained from experiments are demonstrated. This book is intended for academic researchers and graduate students in fluid dynamics, aiming to consolidate the basic theory, physical mechanism, and latest progress in the field of bubble dynamics.

Introduction.- Equations of Bubble dynamics.- Bubble oscillation dynamics.- Prediction model of bubble collapse jet.- Visualization of bubble collapse dynamics.- Conclusions.

Xiaoyu Wang received his doctor’s degree from North China Electric Power University in June 2024. He focuses his research interests on cavitation and bubble dynamics, concentrating on experimental research, theoretical analysis, and numerical simulation of high-speed phenomena such as bubble oscillation, jets, and shock waves. He has participated in the publication of 17 journal papers in these fields, bubble resonance characteristics, which discovered the jet deflection phenomena and the formation mechanism of the shock waves.

Yufei Wang is currently a masters degree candidate in North China Electric Power University. She mainly engages in research on the cavitation bubble morphology evolution near various types of walls and bubble collapse dynamics. She has participated in the publication of 2 journal papers in these fields, which investigated the bubble morphology evolution and the non-spherical behaviors of a cavitation bubble.

Qi Liang is currently a doctoral candidate in North China Electric Power University. She mainly focuses on research on the cavitation bubble collapse dynamics and the collapse jet characteristics. She has published 3 journal papers in these fields, investigating the strength and directional deflection properties of jet near the particle and the wall.

Yuning Zhang is currently a professor in North China Electric Power University. He primarily focuses on the research in cavitation and bubble dynamics. He has published 2 monographs in Springer Press and over 90 papers (10 highly cited papers and 1 hot paper) in journals such as Nature Communications, Physics of Fluids, and Energy. He was ranked by Stanford University as one of the “top 2% of scientists in the world by 2023”. In addition, he is an Associate Editor of IET Renewable Power Generation and an Editorial Board Member of 6 international/national journals such as Journal of Hydrodynamics. He also serves as Chairman of International Cavitation Forum 2016, member of organizing committee of WIMRC International Symposium of Cavitation (UK) and many other international conferences, and has given six invited talks on international conferences. He has received many awards from the society of energy and electric power in China.