Transport And Coherent Structures In Wall Turbulence PDF Download
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| Author | : Sedat Tardu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 500 |
| Release | : 2014-09-10 |
| Genre | : Technology & Engineering |
| ISBN | : 1118576772 |
Download Transport and Coherent Structures in Wall Turbulence Book in PDF, ePub and Kindle
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.
| Author | : Sedat Tardu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 234 |
| Release | : 2013-02-07 |
| Genre | : Science |
| ISBN | : 1118601580 |
Download Statistical Approach to Wall Turbulence Book in PDF, ePub and Kindle
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.
| Author | : Jeremy G. Venditti |
| Publisher | : John Wiley & Sons |
| Total Pages | : 586 |
| Release | : 2013-08-28 |
| Genre | : Science |
| ISBN | : 1118527194 |
Download Coherent Flow Structures at Earth's Surface Book in PDF, ePub and Kindle
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.
| Author | : Horst Punzmann |
| Publisher | : World Scientific |
| Total Pages | : 397 |
| Release | : 2006-11-29 |
| Genre | : Science |
| ISBN | : 981447844X |
Download Lecture Notes On Turbulence And Coherent Structures In Fluids, Plasmas And Nonlinear Media Book in PDF, ePub and Kindle
This book is based on the lectures delivered at the 19th Canberra International Physics Summer School held at the Australian National University in Canberra (Australia) in January 2006.The problem of turbulence and coherent structures is of key importance in many fields of science and engineering. It is an area which is vigorously researched across a diverse range of disciplines such as theoretical physics, oceanography, atmospheric science, magnetically confined plasma, nonlinear optics, etc. Modern studies in turbulence and coherent structures are based on a variety of theoretical concepts, numerical simulation techniques and experimental methods, which cannot be reviewed effectively by a single expert.The main goal of these lecture notes is to introduce state-of-the-art turbulence research in a variety of approaches (theoretical, numerical simulations and experiments) and applications (fluids, plasmas, geophysics, nonlinear optical media) by several experts. A smooth introduction is presented to readers who are not familiar with the field, while reviewing the most recent advances in the area. This collection of lectures will provide a useful review for both postgraduate students and researchers new to the advancements in this field, as well as specialists seeking to expand their knowledge across different areas of turbulence research.
| Author | : Nadine Aubry |
| Publisher | : |
| Total Pages | : 344 |
| Release | : 1987 |
| Genre | : Turbulence |
| ISBN | : |
Download A Dynamical System/coherent Structure Approach to the Fully Developed Turbulent Wall Layer Book in PDF, ePub and Kindle
| Author | : G. Biswas |
| Publisher | : CRC Press |
| Total Pages | : 478 |
| Release | : 2002 |
| Genre | : Technology & Engineering |
| ISBN | : 9780849310140 |
Download Turbulent Flows Book in PDF, ePub and Kindle
This book allows readers to tackle the challenges of turbulent flow problems with confidence. It covers the fundamentals of turbulence, various modeling approaches, and experimental studies. The fundamentals section includes isotropic turbulence and anistropic turbulence, turbulent flow dynamics, free shear layers, turbulent boundary layers and plumes. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more.
| Author | : Sedat Tardu |
| Publisher | : John Wiley & Sons |
| Total Pages | : 212 |
| Release | : 2017-05-01 |
| Genre | : Science |
| ISBN | : 1848215592 |
Download Wall Turbulence Control Book in PDF, ePub and Kindle
Wall turbulence control is a major subject, the investigation of which involves significant industrial, environmental and fundamental consequences. Wall Turbulence Control addresses recent advances achieved in active and passive wall turbulence control over the past two decades. This valuable reference for scientists, researchers and engineers provides an updated view of the research into this topic, including passive control, optimal and suboptimal control methodology, linear control and control using adaptive methods (neural networks), polymer and bubble injection, electromagnetic control and recent advances in control by plasma.
| Author | : O. Métais |
| Publisher | : Springer |
| Total Pages | : 648 |
| Release | : 1991 |
| Genre | : Mathematics |
| ISBN | : |
Download Turbulence and Coherent Structures Book in PDF, ePub and Kindle
The discovery of coherent structures among turbulence is the most striking advance in fluid dynamics during these last 20 years. The purpose of this book was to gather the latest results presented at the conference by experimentalists, theoreticians and numerical modellers interested in the origin of these structures, their dynamics and their interaction with small-scale turbulence.
| Author | : Christos Nikolaides |
| Publisher | : |
| Total Pages | : 680 |
| Release | : 1984 |
| Genre | : |
| ISBN | : |
Download A Study of the Coherent Structures in the Viscous Wall Region of a Turbulent Flow Book in PDF, ePub and Kindle
Conditionally averaged measurements of flow in the viscous wall region showed that strong spanwise flows at y(+) = 40 are related to strong spanwise flows at the wall that are of the opposite sign. At y(+) = 20 spanwise flows are always in phase with flows at the wall. Characteristics of the dominant eddies at the wall were explored by performing numerical computations using a fixed cell in space. Close to the edge of the viscous sublayer (y(+) = 15) use of a single spatial harmonic (lambda(+) = 100) was found to be adequate in predicting all important features of turbulence. At the edge of the viscous wall layer two spatial harmonics were found to be necessary to describe the flow field. The longer scale outer flow eddies produce most of the spanwise mixing in the wall region. The smaller scale lambda(+) = 100 eddies can account for momentum transport, Reynolds stress production and creation of mean u squared and mean v squared energy in this region. The physical picture of the flow resulting mean u squared and mean v squared from interaction of the wall with the outer layer is as follows. The mean flow energy is primarily produced in the outer layer by the mean pressure gradient and is subsequently transferred into viscous wall region. All the turbulent kinetic energy is produced by the v-w flow in the wall layer and is concentrated in the streamwise component of the velocity. This energy is convected out of the wall layer into the core region, where part of it is transferred to motion of the y-z plane. The cycle of events completes with the transport of mean v squared energy into the wall region and set-up of the v-w field.
| Author | : Manuel D. Salas |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 385 |
| Release | : 2012-12-06 |
| Genre | : Science |
| ISBN | : 9401147248 |
Download Modeling Complex Turbulent Flows Book in PDF, ePub and Kindle
Turbulence modeling both addresses a fundamental problem in physics, 'the last great unsolved problem of classical physics,' and has far-reaching importance in the solution of difficult practical problems from aeronautical engineering to dynamic meteorology. However, the growth of supercom puter facilities has recently caused an apparent shift in the focus of tur bulence research from modeling to direct numerical simulation (DNS) and large eddy simulation (LES). This shift in emphasis comes at a time when claims are being made in the world around us that scientific analysis itself will shortly be transformed or replaced by a more powerful 'paradigm' based on massive computations and sophisticated visualization. Although this viewpoint has not lacked ar ticulate and influential advocates, these claims can at best only be judged premature. After all, as one computational researcher lamented, 'the com puter only does what I tell it to do, and not what I want it to do. ' In turbulence research, the initial speculation that computational meth ods would replace not only model-based computations but even experimen tal measurements, have not come close to fulfillment. It is becoming clear that computational methods and model development are equal partners in turbulence research: DNS and LES remain valuable tools for suggesting and validating models, while turbulence models continue to be the preferred tool for practical computations. We believed that a symposium which would reaffirm the practical and scientific importance of turbulence modeling was both necessary and timely.
