Soliton/Like Coherent Structures in Fluid Mechanics

This open access book commemorates the 30th anniversary of the discovery of Solitons/like Coherent Structures (SCS) under experimental conditions, presenting a curated collection of contributions on SCS, the most important physical structures in the origin and development of turbulent flows.

Different from previous books that focus on theory and numerical simulation, this book offers a comprehensive and systematic theoretical framework to address the global challenge of understanding the origins of turbulence from an experimental physics perspective. It begins with the common physical dynamics of turbulence within the boundary layer across various incoming flow conditions. Subsequently, it demonstrates that other significant shear flows have the same physical dynamical processes, uncovering the universal laws of the origin of turbulence. More importantly, it provided the key to solving the origin of turbulence- one of the two important aspects of the turbulence problem that has persisted for over a century.

The research method provided in this book is unique: flow visualization is the first step of the experiment, followed by the quantitative measurement, and cross-validation. The experimental methods and experimental data processing methods are novel, developed surrounding the reconstruction of the three-dimensional flow structure. A distinguishing feature of this book is its integration of theory, experimentation, and computation, utilizing effective data processing and computational outcomes to construct a cohesive physical understanding. It starts with the simplest problemsmall perturbation laminar boundary transitionsbefore exploring the complexities of turbulent boundary layer turbulence generation and ultimately extending this understanding to other flow types. This book is an invaluable resource for researchers and students in the field of turbulence physics.

This book is open access, which means that you have free and unlimited access Presents a curated collection of contributions on Solitons/like Coherent Structures (SCS) Provides a theoretical framework to address the global challenge of the origins of turbulence Covers a series of novel research methods

Autorentext

Cunbiao Lee is Professor at the Department of Aeronautics & Astronautics, College of Engineering, Peking University, China. Cunbiao Lee is Director of the State Key Laboratory of Turbulence Research and Complex System.

Inhalt

1. Soliton/like Coherent Structure: a Key Opening the Door of Turbulence.- 2. New Features of Soliton/like Coherent Structures and the Formation of Vortices.- 3. Possible Universal Transitional Scenario in a Flat Plate Boundary Layer: Measurement and Visualization.- 4. Flow Structures in Transitional and Turbulent Boundary Layers.- 5. Structure Evolution at Early Stage of Boundary-Layer Transition:Simulation and Experiment.