Xiaoyu Wang

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.

This brief explores the pivotal realm of droplet cavitation, a subject of great significance for enhancing fuel atomization and improving various industrial processes. The authors employ high-speed photography experiments, analyze bubble dynamics equations, and utilize numerical simulations to explore the dynamic behavior of cavitation bubbles and droplets. The book analyzes the entire lifecycle of cavitation bubbles, their interactions with different liquid droplets, and the key parameters governing their oscillation and collapse and sheds light on the collapse mechanisms and shock wave propagation influenced by liquid droplets. Additionally, it investigates the dynamics of droplet spattering by categorizing spatter patterns under diverse conditions, discusses the critical stability of droplet surfaces, and reveals the mechanisms by which cavitation bubble collapses induce droplet breakage. Taking vapor bubbles and diesel droplets as examples, the dynamic characteristics of specific droplets containing bubbles are also analyzed. This book offers an in-depth understanding of these phenomena with practical implications for a wide range of industrial applications and is a useful tool for researchers and engineers working in the fields of fluid dynamics, combustion engineering, and atomization processes.

This book describes the fundamental concepts, the latest developments and the outlook of the field of nanozymes (i.e., the catalytic nanomaterials with enzymatic characteristics). As one of today’s most exciting fields, nanozyme research lies at the interface of chemistry, biology, materials science and nanotechnology. Each of the book’s six chapters explores advances in nanozymes. Following an introduction to the rise of nanozymes research in the course of research on natural enzymes and artificial enzymes in Chapter 1, Chapters 2 through 5 discuss different nanomaterials used to mimic various natural enzymes, from carbon-based and metal-based nanomaterials to metal oxide-based nanomaterials and other nanomaterials. In each of these chapters, the nanomaterials’ enzyme mimetic activities, catalytic mechanisms and key applications are covered. In closing, Chapter 6 addresses the current challenges and outlines further directions for nanozymes. Presenting extensive information on nanozymes and supplemented with a wealth of color illustrations and tables, the book offers an ideal guide for readers from disparate areas, including analytical chemistry, materials science, nanoscience and nanotechnology, biomedical and clinical engineering, environmental science and engineering, green chemistry, and novel catalysis.

Explores photofunctional polymer composites for cutting-edge biomedical applications and innovations The rapid evolution of materials science has positioned photofunctional polymer composites as a central focus in advancing biomedical technologies. These materials, with their tunable light-responsive properties, play a pivotal role in enabling breakthroughs in bioimaging, cancer therapy, and phototherapy. However, while fundamental research in this field has progressed considerably, translating these innovations into practical biomedical products continues to present significant challenges. Photofunctional Polymer Composites for Bioapplications systematically covers the structures, properties, and applications of polymer composites designed for biomedical use. Featuring clear organization with chapters progressing from foundational principles to advanced applications, the book begins with an overview of classifications and biomedical applications of photofunctional polymer composites before progressing to their structures, photophysical and chemical properties, and construction strategies. The central chapters focus on fibers, films, nanocomposites, and hydrogels, each discussing design, synthesis, and biomedical function. The final chapter offers a forward-looking perspective on the field, stressing interdisciplinary collaboration as a pathway to practical implementation. Balancing theory, methodology, and application, Photofunctional Polymer Composites for Bioapplications: Covers an extensive range of polymer composite types, including nanomaterials, fibers, films, and hydrogels Provides in-depth discussion of charge transport, energy conversion, and signal transduction in composite systems Provides insights into how multi-component strategies and interface engineering may overcome current limitations Explores approaches that integrate chemistry, physics, biology, and engineering Includes detailed examination of biosafety considerations critical to biomedical applications An authoritative reference for advancing both research and translational development, Photofunctional Polymer Composites for Bioapplications is designed for graduate-level students, researchers, and professionals in polymer chemistry, materials science, and biomedical engineering. It is well-suited for courses such as Advanced Biomaterials, Polymer Science for Biomedical Applications, and Nanomaterials in Medicine within graduate and doctoral programs in chemistry, materials science, and bioengineering.

Fundamentals of Aeroacoustics with Applications to Aeropropulsion Systems from the Shanghai Jiao Tong University Press Aerospace series, is the go-to reference on the topic, providing a modern take on the fundamental theory and applications relating to prediction and control of all major noise sources in aeropropulsion systems. This important reference compiles the latest knowledge and research advances, considering both the physics of aerodynamic noise generation in aero-engines and related numerical prediction techniques. Additionally, it introduces new vortex sound interaction models, a transfer element method, and a combustion instability model developed by the authors. Focusing on propulsion systems from inlet to exit, including combustion noise, this new resource will aid graduate students, researchers, and R&D engineers in solving the aircraft noise problems that currently challenge the industry.