Liutex And Its Applications In Turbulence Research

Author : Chaoqun Liu,Hongyi Xu,Xiaoshu Cai,Yisheng Gao
Publisher : Academic Press
Page : 458 pages
File Size : 54,7 Mb
Release : 2020-10-29
Category : Science
ISBN : 9780128190241

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Liutex and Its Applications in Turbulence Research by Chaoqun Liu,Hongyi Xu,Xiaoshu Cai,Yisheng Gao Pdf

Liutex and Its Applications in Turbulence Research reviews the history of vortex definition, provides an accurate mathematical definition of vortices, and explains their applications in flow transition, turbulent flow, flow control, and turbulent flow experiments. The book explains the term "Rortex" as a mathematically defined rigid rotation of fluids or vortex, which could help solve many longstanding problems in turbulence research. The accurate mathematical definition of the vortex is important in a range of industrial contexts, including aerospace, turbine machinery, combustion, and electronic cooling systems, so there are many areas of research that can benefit from the innovations described here. This book provides a thorough survey of the latest research in generalized and flow-thermal, unified, law-of-the-wall for wall-bounded turbulence. Important theory and methodologies used for developing these laws are described in detail, including: the classification of the conventional turbulent boundary layer concept based on proper velocity scaling; the methodology for identification of the scales of velocity, temperature, and length needed to establish the law; and the discovery, proof, and strict validations of the laws, with both Reynolds and Prandtl number independency properties using DNS data. The establishment of these statistical laws is important to modern fluid mechanics and heat transfer research, and greatly expands our understanding of wall-bounded turbulence. Provides an accurate mathematical definition of vortices Provides a thorough survey of the latest research in generalized and flow-thermal, unified, law-of-the-wall for wall-bounded turbulence Explains the term “Rortex as a mathematically defined rigid rotation of fluids or vortex Covers the statistical laws important to modern fluid mechanics and heat transfer research, and greatly expands our understanding of wall-bounded turbulence

Author : Chaoqun Liu,Yisheng Gao
Publisher : Bentham Science Publishers
Page : 343 pages
File Size : 42,9 Mb
Release : 2020-04-28
Category : Science
ISBN : 9789811437588

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Liutex-based and Other Mathematical, Computational and Experimental Methods for Turbulence Structure by Chaoqun Liu,Yisheng Gao Pdf

The knowledge of quantitative turbulence mechanics relies heavily upon the definition of the concept of a vortex in mathematical terms. This reference work introduces the reader to Liutex, which is an accepted, accurate and mathematical definition of a vortex. The core of this book is a compilation of several papers on the subject. presented in the 13th World Congress of Computational Mechanics (WCCM2018), Symposium 704, Mathematics and Computations for Multiscale Structures of Turbulent and Other Complex Flows, New York, United States on July 27, 2018. This compilation also includes other research papers which explain the work done on the vortex definition, vortex identification and turbulence structure from different insight angles including mathematics, computational physics and experiments. The thirteen chapters in this volume will be informative to scientists and engineers who are interested in advanced theories about fluid dynamics, vortex science and turbulence research.

Author : Chaoqun Liu,Yiqian Wang
Publisher : Springer Nature
Page : 479 pages
File Size : 54,5 Mb
Release : 2021-07-26
Category : Science
ISBN : 9783030702175

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Liutex and Third Generation of Vortex Definition and Identification by Chaoqun Liu,Yiqian Wang Pdf

This book collects papers presented in the Invited Workshop, “Liutex and Third Generation of Vortex Definition and Identification for Turbulence,” from CHAOS2020, June 9-12, 2020, which was held online as a virtual conference. Liutex is a new physical quantity introduced by Prof. Chaoqun Liu of the University of Texas at Arlington. It is a vector and could give a unique and accurate mathematical definition for fluid rotation or vortex. The papers in this volume include some Liutex theories and many applications in hydrodynamics, aerodynamics and thermal dynamics including turbine machinery. As vortex exists everywhere in the universe, a mathematical definition of vortex or Liutex will play a critical role in scientific research. There is almost no place without vortex in fluid dynamics. As a projection, the Liutex theory will play an important role on the investigations of the vortex dynamics in hydrodynamics, aerodynamics, thermodynamics, oceanography, meteorology, metallurgy, civil engineering, astronomy, biology, etc. and to the researches of the generation, sustenance, modelling and controlling of turbulence.

Author : Yiqian Wang,Yisheng Gao,Chaoqun Liu
Publisher : Springer Nature
Page : 421 pages
File Size : 50,6 Mb
Release : 2023-03-21
Category : Science
ISBN : 9789811989551

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Liutex and Third Generation of Vortex Identification by Yiqian Wang,Yisheng Gao,Chaoqun Liu Pdf

This proceedings highlights the applications of the newly introduced physical quantity Liutex in hydrodynamics and aerodynamics. Liutex is used to represent the fascinating rotational motion of fluids, i.e., the vortex. Ubiquitously seen in nature and engineering applications, the definition of vortices has been elusive. The Liutex vector provides a unique and systematic description of vortices. The proceedings collects papers presented in the invited workshop "Liutex and Third Generation of Vortex Identification for Engineering Applications" from Aerospace and Aeronautics World Forum 2021. The papers in this book cover both the theoretical aspects of Liutex and many applications in hydrodynamics and aerodynamics. The proceedings is a good reference for researchers in fluid mechanics who are interested in learning about the wide scope of applications of Liutex and using it to develop a new understanding of their research subjects.

Author : Yifei Yu
Publisher : Springer Nature
Page : 201 pages
File Size : 40,6 Mb
Release : 2024-06-26
Category : Electronic
ISBN : 9783031536700

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Mechanism of Hairpin Vortex Formation by Liutex by Yifei Yu Pdf

Author : Chaoqun Liu,Yifei Yu
Publisher : BoD – Books on Demand
Page : 126 pages
File Size : 55,8 Mb
Release : 2024-01-24
Category : Science
ISBN : 9781837686407

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Vortex Simulation and Identification by Chaoqun Liu,Yifei Yu Pdf

This book includes six chapters covering new vortex theories, vortex identification methods, and vortex simulation and applications. Vortices are ubiquitous in the universe and include tornados, hurricanes, airplane tip vortices, polar vortices, and even star vortices in the galaxy. Vortices are also building blocks, muscles, and sinews of turbulent flows. This book is useful for researchers in hydrodynamics, aerodynamics, thermodynamics, oceanography, meteorology, metallurgy, civil engineering, astronomy, biology, and more. It is also useful for research on the generation, sustenance, modeling, and controlling of turbulence.

Author : Farah Ahmed,Raed Hashaikeh,Nidal Hilal
Publisher : CRC Press
Page : 328 pages
File Size : 42,8 Mb
Release : 2023-05-04
Category : Technology & Engineering
ISBN : 9781000854626

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Electrically Conductive Membrane Materials and Systems by Farah Ahmed,Raed Hashaikeh,Nidal Hilal Pdf

Electrically Conductive Membrane Materials and Systems offers in-depth insight into the transformative role of electrically conductive materials in membrane separation processes for desalination and water treatment. The book focuses on the intelligent design of conductive membranes and systems, fouling and related phenomena, fouling control using electrically conductive materials, and electrically tunable membrane systems for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, and membrane distillation. With rising concerns around inaccessibility to freshwater and the ever increasing threats of population growth, climate change, and urban development, the book brings electrically conducting materials to the forefront of membrane separation technology with an emphasis on their role in the mitigation of fouling and related phenomena. Electrically conducting materials expand the versatility of membrane technology and ultimately improve access to safe water. The book is important reading for scientists, engineers, entrepreneurs, and enthusiasts from the water industry who seek to familiarize themselves with a groundbreaking area of study within modern desalination and water treatment. • Explores novel membrane materials and systems from preparation methods, materials selection, and their application in monitoring, fouling control, and performance enhancement. • Examines the mechanism of fouling prevention and cleaning in various electrically conductive materials. • Evaluates the scalability of antifouling materials and coatings, as well as electrically enhanced processes for monitoring and control in membrane separation technology. • Assesses advantages and limitations of applying electrically conductive membrane systems to fouling control for specific water treatment applications. • Provides a critical review of scientific literature in the specialized area of electrical conductive materials and systems for membrane technology.

Author : Chaoqun Liu
Publisher : Current Developments in Mathem
Page : 342 pages
File Size : 50,7 Mb
Release : 2020-04-28
Category : Science
ISBN : 9811437599

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Liutex-based and Other Mathematical, Computational and Experimental Methods for Turbulence Structure by Chaoqun Liu Pdf

The knowledge of quantitative turbulence mechanics relies heavily upon the definition of the concept of a vortex in mathematical terms. This reference work introduces the reader to Liutex, which is an accepted, accurate and mathematical definition of a vortex. The core of this book is a compilation of several papers on the subject. presented in the 13th World Congress of Computational Mechanics (WCCM2018), Symposium 704, Mathematics and Computations for Multiscale Structures of Turbulent and Other Complex Flows, New York, United States on July 27, 2018. This compilation also includes other research papers which explain the work done on the vortex definition, vortex identification and turbulence structure from different insight angles including mathematics, computational physics and experiments. The thirteen chapters in this volume will be informative to scientists and engineers who are interested in advanced theories about fluid dynamics, vortex science and turbulence research.

Author : Jiyuan Tu,Guan Heng Yeoh,Chaoqun Liu
Publisher : Butterworth-Heinemann
Page : 458 pages
File Size : 47,5 Mb
Release : 2012-11-07
Category : Computers
ISBN : 9780080982434

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Computational Fluid Dynamics by Jiyuan Tu,Guan Heng Yeoh,Chaoqun Liu Pdf

An introduction to CFD fundamentals and using commercial CFD software to solve engineering problems, designed for the wide variety of engineering students new to CFD, and for practicing engineers learning CFD for the first time. Combining an appropriate level of mathematical background, worked examples, computer screen shots, and step by step processes, this book walks the reader through modeling and computing, as well as interpreting CFD results. The first book in the field aimed at CFD users rather than developers. New to this edition: A more comprehensive coverage of CFD techniques including discretisation via finite element and spectral element as well as finite difference and finite volume methods and multigrid method. Coverage of different approaches to CFD grid generation in order to closely match how CFD meshing is being used in industry. Additional coverage of high-pressure fluid dynamics and meshless approach to provide a broader overview of the application areas where CFD can be used. 20% new content .

Author : Michael Eckert
Publisher : Springer Nature
Page : 213 pages
File Size : 42,9 Mb
Release : 2022-02-01
Category : Science
ISBN : 9783030914592

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Turbulence—an Odyssey by Michael Eckert Pdf

Turbulence is a research field where high expectations have met with recurrent frustration. It is a common perception among physicists, mathematicians and engineers that there is a "big mystery" behind the phenomenon of turbulence. Its history has also remained anything but well researched. Unlike topics such as quantum theory, which began to attract physics historians as long as fifty years ago, turbulence has - until now - received only little professional historical investigation. In this book, which complements his earlier SpringerBrief "The Turbulence Problem", the author sketches the history of turbulence from the vantage point of its roots (Part I), the basic concepts (Part II) and the formation of a scientific community that regarded turbulence as a research field in its own right (Part III). From this perspective turbulence research appears to undertake an odyssey through uncharted territories. The book follows this development up until a conference in Marseille in the year 1961, which marked the inauguration of turbulence in the words of its organizer as “a new science”. The epilogue contains some observations about turbulence research since 1961. This book provides a rich source of information for all those interested in the history of this major field of basic and applied science.

Author : Uriel Frisch
Publisher : Springer Science & Business Media
Page : 648 pages
File Size : 54,6 Mb
Release : 1998
Category : Science
ISBN : STANFORD:36105023056927

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Advances in Turbulence 7 by Uriel Frisch Pdf

Suitable for specialists in the field of flow turbulence, this volume comprises an almost complete collection of the papers delivered at the June/July 1998 conference. Providing an overview of the state of turbulence research with some bias towards work done in Europe, contributions are organized into the following sections: experiments and experimental techniques; transition and dynamical systems; numerical simulation; high Reynolds numbers and intermittency; industrial applications and modeling; vortex dynamics; astro- geophysical flow and convection; and transport of passive scalars. Lacks a subject index. Annotation copyrighted by Book News, Inc., Portland, OR

Author : Victor Raizer
Publisher : CRC Press
Page : 293 pages
File Size : 48,6 Mb
Release : 2021-10-04
Category : Technology & Engineering
ISBN : 9781000458800

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Remote Sensing of Turbulence by Victor Raizer Pdf

This book offers a unique multidisciplinary integration of the physics of turbulence and remote sensing technology. Remote Sensing of Turbulence provides a new vision on the research of turbulence and summarizes the current and future challenges of monitoring turbulence remotely. The book emphasizes sophisticated geophysical applications, detection, and recognition of complex turbulent flows in oceans and the atmosphere. Through several techniques based on microwave and optical/IR observations, the text explores the technological capabilities and tools for the detection of turbulence, their signatures, and variability. FEATURES Covers the fundamental aspects of turbulence problems with a broad geophysical scope for a wide audience of readers Provides a complete description of remote-sensing capabilities for observing turbulence in the earth’s environment Establishes the state-of-the-art remote-sensing techniques and methods of data analysis for turbulence detection Investigates and evaluates turbulence detection signatures, their properties, and variability Provides cutting-edge remote-sensing applications for space-based monitoring and forecasts of turbulence in oceans and the atmosphere This book is a great resource for applied physicists, the professional remote sensing community, ecologists, geophysicists, and earth scientists.

Author : Regis Barille
Publisher : BoD – Books on Demand
Page : 94 pages
File Size : 48,7 Mb
Release : 2019-04-17
Category : Science
ISBN : 9781838800178

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Turbulence and Related Phenomena by Regis Barille Pdf

This book presents some of the most important results concerning atmospheric turbulence and some of its effects on the propagation of a light beam. Atmospheric turbulence causes fluctuations in both the intensity and the phase of the beam and still must be understood and modelized for applications in photonics or environmental metrology. The future of free-space optical (FSO) communication through atmospheric turbulence channels is especially of interest and research on high bit-rate communications attracts more and more interest as an alternative to radio links because of bandwidth, spectrum, and security issues. Some of the current solutions for improving FSO communications are presented in this book.

Author : S. Gavrilakis,L. Machiels,P.A. Monkewitz
Publisher : Springer
Page : 664 pages
File Size : 45,6 Mb
Release : 1996-06-30
Category : Science
ISBN : 0792341325

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Advances in Turbulence VI by S. Gavrilakis,L. Machiels,P.A. Monkewitz Pdf

Advances in Turbulence VI presents an update on the state of turbulence research with some bias towards research in Europe, since it represents an almost complete collection of the paper presentations at the Sixth European Turbulence Conference, sponsored by EUROMECH, ERCOFTAC and COST, and held at the Swiss Federal Institute of Technology in Lausanne, July 2-5, 1996. The problem of transition, together with the structural description of turbulence, and the scaling laws of fully developed turbulence have continued to receive most attention by the research community and much progress has been made since the last European Turbulence Conference in 1994. The volume is thus geared towards specialists in the area of flow turbulence who could not attend the conference, as well as anybody who wishes quickly to assess the most active current research areas and the groups associated with them.

Author : Nan Gui,Shengyao Jiang,Jiyuan Tu,Xingtuan Yang
Publisher : Elsevier
Page : 386 pages
File Size : 49,5 Mb
Release : 2019-10-22
Category : Computers
ISBN : 9780128163993

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Gas-Particle and Granular Flow Systems by Nan Gui,Shengyao Jiang,Jiyuan Tu,Xingtuan Yang Pdf

Gas-Particle and Granular Flow Systems: Coupled Numerical Methods and Applications breaks down complexities, details numerical methods (including basic theory, modeling and techniques in programming), and provides researchers with an introduction and starting point to each of the disciplines involved. As the modeling of gas-particle and granular flow systems is an emerging interdisciplinary field of study involving mathematics, numerical methods, computational science, and mechanical, chemical and nuclear engineering, this book provides an ideal resource for new researchers who are often intimidated by the complexities of fluid-particle, particle-particle, and particle-wall interactions in many disciplines. Presents the most recent advances in modeling of gas-particle and granular flow systems Features detailed and multidisciplinary case studies at the conclusion of each chapter to underscore key concepts Discusses coupled methods of particle and granular flow systems theory and includes advanced modeling tools and numerical techniques