Coherent Structure Dynamics in Near-wall Turbulence
| Author | : W. Schoppa |
| Publisher | : |
| Total Pages | : |
| Release | : 2000 |
| Genre | : |
| ISBN | : |
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Transport and Coherent Structures in Wall Turbulence
| Author | : Sedat Tardu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 500 |
| Release | : 2014-09-10 |
| Genre | : Technology & Engineering |
| ISBN | : 1118576772 |
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Wall bounded turbulent flows are of major importance in industrial and environmental fluid mechanics. The structure of the wall turbulence is intrinsically related to the coherent structures that play a fundamental role in the transport process. The comprehension of their regeneration mechanism is indispensable for the development of efficient strategies in terms of drag control and near wall turbulence management. This book provides an up-to-date overview on the progress made in this specific area in recent years.
Studies of Coherent Structure Generation in Near-wall Turbulence
| Author | : Wade Schoppa |
| Publisher | : |
| Total Pages | : 866 |
| Release | : 2000 |
| Genre | : Turbulent boundary layer |
| ISBN | : |
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Turbulence and Interactions
| Author | : Michel Deville |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 166 |
| Release | : 2009-03-20 |
| Genre | : Technology & Engineering |
| ISBN | : 3642002625 |
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Contains seven keynote lectures of the TI 2006 conference that was held in Porquerolles, May 29-June 2, 2006. This book offers a view on theory, experiments and numerical simulations in the field of turbulence.
Turbulence and Coherent Structures
| Author | : O. Métais |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 612 |
| Release | : 2013-03-09 |
| Genre | : Technology & Engineering |
| ISBN | : 9401579040 |
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In the last 25 years, one of the most striking advances in Fluid Mecha nics was certainly the discovery of coherent structures in turbulence: lab oratory experiments and numerical simulations have shown that most turbulent flows exhibit both spatially-organized large-scale structures and disorganized motions, generally at smaller scales. The develop ment of new measurement and visualization techniques have allowed a more precise characterization and investigation of these structures in the laboratory. Thanks to the unprecedented increase of computer power and to the development of efficient interactive three-dimensional colour graphics, computational fluid dynamicists can explore the still myste rious world of turbulence. However, many problems remain unsolved concerning the origin of these structures, their dynamics, and their in teraction with the disorganized motions. In this book will be found the latest results of experimentalists, theoreticians and numerical modellers interested in these topics. These coherent structures may appear on airplane wings or slender bodies, mixing layers, jets, wakes or boundary-layers. In free-shear flows and in boundary layers, the results presented here highlight the intense three-dimensional character of the vortices. The two-dimensional large scale eddies are very sensitive to three-dimensional perturbations, whose amplification leads to the formation of three-dimensional coherent vorti cal structures, such as streamwise, hairpin or horseshoe vortex filaments. This book focuses on modern aspects of turbulence study. Relations between turbulence theory and optimal control theory in mathematics are discussed. This may have important applications with regard to, e. g. , numerical weather forecasting.
Self-sustaining Mechanisms of Wall Turbulence
| Author | : Ronald Lee Panton |
| Publisher | : Computational Mechanics |
| Total Pages | : 448 |
| Release | : 1997 |
| Genre | : Science |
| ISBN | : |
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Why is wall turbulence self-sustaining? In this book well-regarded researchers not only discuss what they know and believe, but also speculate on ideas that still require numerical or experimental testing and verification. An initial brief history of boundary layer structure research is followed by chapters on experimental information and specific topics within the subject. There are then sections on computational aspects.
Statistical Approach to Wall Turbulence
| Author | : Sedat Tardu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 234 |
| Release | : 2013-02-07 |
| Genre | : Science |
| ISBN | : 1118601580 |
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Wall turbulence is encountered in many technological applications as well as in the atmosphere, and a detailed understanding leading to its management would have considerable beneficial consequences in many areas. A lot of inspired work by experimenters, theoreticians, engineers and mathematicians has been accomplished over recent decades on this important topic and Statistical Approach to Wall Turbulence provides an updated and integrated view on the progress made in this area. Wall turbulence is a complex phenomenon that has several industrial applications, such as in aerodynamics, turbomachinery, geophysical flows, internal engines, etc. Several books exist on fluid turbulence, but Statistical Approach to Wall Turbulence is original in the sense that it focuses solely on the turbulent flows bounded by solid boundaries. The book covers the different physical aspects of wall turbulence, beginning with classical phenomenological aspects before advancing to recent research in the effects of the Reynolds numbers, near wall coherent structures, and wall turbulent transport process. This book would be of interest to postgraduate and undergraduate students in mechanical, chemical, and aerospace engineering, as well as researchers in aerodynamics, combustion, and all applications of wall turbulence.
Coherent Flow Structures at Earth's Surface
| Author | : Jeremy G. Venditti |
| Publisher | : John Wiley & Sons |
| Total Pages | : 586 |
| Release | : 2013-08-28 |
| Genre | : Science |
| ISBN | : 1118527194 |
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An expert review of recent progress in the study of turbulent flows with a focus on recently identified organized structures. This book reviews the recent progress in the study of the turbulent flows that sculpt the Earth’s surface, focusing in particular on the organized structures that have been identified in recent years within turbulent flows. These coherent flow structures can include eddies or vortices at the scale of individual grains, through structures that scale with the flow depth in rivers or estuaries, to the large-scale structure of flows at the morphological or landform scale. These flow structures are of wide interest to the scientific community because they play an important role in fluid dynamics and influence the transport, erosion and deposition of sediment and pollutants in a wide variety of fluid flow environments. Scientific knowledge of these structures has improved greatly over the past 20 years as computational fluid dynamics has come to play an increasing important part in building our understanding of coherent flow structures across a broad range of scales. Chapters comprise a series of major, invited papers and a selection of the most novel, innovative papers presented at the second Coherent Flow Structures Conference held August 3-5, 2011 at Simon Fraser University in Burnaby, British Columbia. Chapters focus on six major themes: Dynamics of coherent flow structures (CFS) in geophysical flows Interaction of turbulent flows, vegetation and ecological habitats Coherent structure of atmospheric flows Numerical modeling of coherent flow structures Turbulence in open channel flows Coherent flow structures, sediment transport and morphological feedbacks.
Turbulent Flow Structure Near Walls
| Author | : J. D. A. Walker |
| Publisher | : |
| Total Pages | : 184 |
| Release | : 1991 |
| Genre | : Boundary value problems |
| ISBN | : |
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In the past decade, progress has been made in determining the nature of turbulent flow near walls. Many of these advances, which have occurred through new experimental methodologies, direct numerical simulations, and new theoretical developments, are described in this volume.
Liutex and Its Applications in Turbulence Research
| Author | : Chaoqun Liu |
| Publisher | : Academic Press |
| Total Pages | : 458 |
| Release | : 2020-10-29 |
| Genre | : Science |
| ISBN | : 0128190248 |
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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
