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Author: Sedat Tardu Publisher: John Wiley & Sons ISBN: 1118576772 Category : Technology & Engineering Languages : en Pages : 500
Book Description
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 ISBN: 1118576772 Category : Technology & Engineering Languages : en Pages : 500
Book Description
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 ISBN: 1118601580 Category : Science Languages : en Pages : 234
Book Description
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 ISBN: 1118527194 Category : Science Languages : en Pages : 586
Book Description
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: Sedat Tardu Publisher: John Wiley & Sons ISBN: 1119008611 Category : Science Languages : en Pages : 198
Book Description
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: Dimitrios Vassilios Papavassiliou Publisher: ISBN: Category : Languages : en Pages : 700
Book Description
Direct numerical simulation techniques are used to study wall turbulence and turbulent dispersion. Turbulent dispersion using a Lagrangian approach is studied. Heat or mass markers are released from sources located at the wall of the channel and their trajectories are monitored. The Lagrangian point of view is that scalar transport is the result of the behavior of a sum of these sources. This approach allows the study of turbulent transport at different Prandtl (or Schmidt) numbers, Pr = 0.1 (liquid metals), Pr = 0.7 (air), Pr = 10 (water) to Pr = 100 and 2400 (heavy oils). It also allows the study of different configurations such as dispersion from a line source, heat transfer from a heated plate, heat transfer between a hot and a cold wall and heat transfer between two heated walls. The most interesting result is that the behavior of a single instantaneous point source at the wall can be used as a building block to describe a variety of problems. An Eulerian simulation at Pr = 10 was also carried out. A comparison between results from existing Eulerian DNS with the Lagrangian results shows excellent agreement. Eulerian DNS simulations for Pr $>$ 10 are not currently available. However, Lagrangian simulations at high Pr are possible and offer unique opportunities. In order to study the coherent structures of turbulence in the logarithmic layer, a plane Couette flow simulation is developed. The total stress is constant throughout the Couette channel, providing a logarithmic layer that extends to the center of the channel. A very important result is that backscattering of turbulent kinetic energy feeds energy from small scale turbulence to large scale structures. One implication of this finding is that subgrid modeling in large eddy simulations should take into account backscattering even at simple geometries. A channel flow simulation at double the Reynolds number (Re = 5750) of that used for the Couette flow simulation is documented. The scope is to obtain a thicker logarithmic layer and to compare with results at half Reynolds number. The effect of Re on turbulence statistics and the structure of turbulence is investigated as well as the scaling of turbulence quantities in the inner and outer flow regions.
Author: Michael Shats Publisher: World Scientific ISBN: 9812774076 Category : Science Languages : en Pages : 397
Book Description
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: G. Biswas Publisher: CRC Press ISBN: 9780849310140 Category : Technology & Engineering Languages : en Pages : 478
Book Description
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
Author: Sedat Tardu
Author: Sedat Tardu
Author: Jeremy G. Venditti
Author: Nadine Aubry
Author: Sedat Tardu
Author: Dimitrios Vassilios Papavassiliou
Author: Naim Afgan
Author: Michael Shats
Author: G. Biswas
Author: K J. Sene