Chaoqun Liu, Hongyi Xu, Xiaoshu Cai

Liutex and Its Applications in Turbulence Research

• Broschiertes Buch

Produktbeschreibung

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 classificationof 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.

Produktdetails

• Verlag: Academic Press / Elsevier Science & Technology
• Artikelnr. des Verlages: C2018-0-04985-3
• Englisch
• Abmessung: 234mm x 191mm x 235mm
• Gewicht: 930g
• ISBN-13: 9780128190234
• Artikelnr.: 59182225

Autorenporträt

Dr. Chaoqun Liu received both BS (1968) and MS (1981) from Tsinghua University, Beijing, China and PhD (1989) from University of Colorado at Denver, USA. He is currently the Tenured and Distinguished Professor and the Director of Center for Numerical Simulation and Modeling at University of Texas at Arlington, Arlington, Texas, USA. He has worked on high order direct numerical simulation (DNS) and large eddy simulation (LES) for flow transition and turbulence for over 30 years since 1989. He has published 11 professional books, 120 journal papers and 145 conference papers. He is the founder and major contributor of the third generation of vortex identification methods including the Omega, Liutex/Rortex, Liutex-Omega, Modified Liutex-Omega, Liutex Core Line methods, RS vorticity decomposition and R-NR velocity gradient decomposition.

Professor Xiaoshu Cai works at Shanghai University of Science and Technology in China.

Inhaltsangabe

1. Short Introduction of Classical and Current Theories on Vortex and Turbulence Generation 2. Vortex Definition and Identification - Three Generations on Vortex Definition3. Rortex - A New Mathematical Definition of Fluid Rotation 4. Vortex Structure in Turbulent Boundary Layer - DNS and Experiment5. Linear Stability Analysis of Shear Layer and Rortex6. Large Vortex Formation7. Multiple Level Vortices Generation8. Relation between Vorticity and Rortex and Vorticity Structure in Flow Transition9. POD (SVD) and DMD Modes Analysis, Non-Symmetry and Chaos10. Correlation Analysis of Flow Fluctuation and Rortex11. Turbulent boundary layer and conventional law-of-the-wall12. New Observations and Findings of TBL in Modern DNS data13. Identification of Fluid and Thermal Scales for Developing Statistical Law14. Establishment of Unified Fluid and Thermal Law-of-the-Wall15. Proof and Validations of the Law by DNS data and Connotations of the Law