The Coherent Structure Of Turbulent Mixing Layers
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The Coherent Structure Of Turbulent Mixing Layers
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Author : Luis Paulino Bernal
language : en
Publisher:
Release Date : 1984
The Coherent Structure Of Turbulent Mixing Layers written by Luis Paulino Bernal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Fluid dynamics categories.
Coherent Structures In Turbulent Mixing Layers
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Author : Alberto D'Ovidio
language : en
Publisher:
Release Date : 1998
Coherent Structures In Turbulent Mixing Layers written by Alberto D'Ovidio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Coherent Structures In A Simulated Turbulent Mixing Layer
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Author :
language : en
Publisher:
Release Date : 1992
Coherent Structures In A Simulated Turbulent Mixing Layer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Turbulent Mixing In Nonreactive And Reactive Flows
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Author : S. Murthy
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Turbulent Mixing In Nonreactive And Reactive Flows written by S. Murthy and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
Turbulence, mixing and the mutual interaction of turbulence and chemistry continue to remain perplexing and impregnable in the fron tiers of fluid mechanics. The past ten years have brought enormous advances in computers and computational techniques on the one hand and in measurements and data processing on the other. The impact of such capabilities has led to a revolution both in the understanding of the structure of turbulence as well as in the predictive methods for application in technology. The early ideas on turbulence being an array of complicated phenomena and having some form of reasonably strong coherent struc ture have become well substantiated in recent experimental work. We are still at the very beginning of understanding all of the aspects of such coherence and of the possibilities of incorporating such structure into the analytical models for even those cases where the thin shear layer approximation may be valid. Nevertheless a distinguished body of "eddy chasers" has come into existence. The structure of mixing layers which has been studied for some years in terms of correlations and spectral analysis is also getting better understood. Both probability concepts such as intermittency and conditional sampling as well as the concept of large scale structure and the associated strain seem to indicate possibilities of distinguishing and synthesizing 'engulfment' and molecular mixing.
Scalar Mixing And Coherent Structures In Simulations Of The Plane Turbulent Mixing Layer
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Author : Stephan Nicholas Hug
language : en
Publisher:
Release Date : 2018
Scalar Mixing And Coherent Structures In Simulations Of The Plane Turbulent Mixing Layer written by Stephan Nicholas Hug and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Turbulent Shear Flows 5
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Author : Franz Durst
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Turbulent Shear Flows 5 written by Franz Durst and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The first four symposia in the series on turbulent shear flows have been held alternately in the United States and Europe with the first and third being held at universities in eastern and western States, respectively. Continuing this pattern, the Fifth Symposium on Turbulent Shear Flows was held at Cornell University, Ithaca, New York, in August 1985. The meeting brought together more than 250 participants from around the world to present the results of new research on turbulent shear flows. It also provided a forum for lively discussions on the implications (practical or academic) of some of the papers. Nearly 100 formal papers and about 20 shorter communications in open forums were presented. In all the areas covered, the meeting helped to underline the vitality of current research into turbulent shear flows whether in experimental, theoretical or numerical studies. The present volume contains 25 of the original symposium presentations. All have been further reviewed and edited and several have been considerably extended since their first presentation. The editors believe that the selection provides papers of archival value that, at the same time, give a representative statement of current research in the four areas covered by this book: - Homogeneous and Simple Flows - Free Flows - Wall Flows - Reacting Flows Each of these sections begins with an introductory article by a distinguished worker in the field.
Workshop On Coherent Structure Of Turbulent Boundary Layers
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Author : Charles Robert Smith
language : en
Publisher:
Release Date : 1981
Workshop On Coherent Structure Of Turbulent Boundary Layers written by Charles Robert Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
Turbulence And Coherent Structures
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Author : O. Métais
language : en
Publisher: Springer
Release Date : 2014-03-14
Turbulence And Coherent Structures written by O. Métais and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03-14 with Technology & Engineering categories.
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.
Transmission Of Light Through A Turbulent Mixing Layer
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Author :
language : en
Publisher:
Release Date : 1992
Transmission Of Light Through A Turbulent Mixing Layer written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Light transmission through incompressible gaseous turbulent mixing layers was investigated with the objective of understanding the effects of large-scale coherent structures and mixing transition on the optical quality of the mixing layer. Experiments were done in a vertically flowing mixing layer which is enclosed inside a pressure tank and fed by two banks of high-pressure gas bottles. The study considered both the unequal density (high-speed He and low-speed N2) and equal density (high-speed N2 and low-speed He-Ar) cases; the mixing of dissimilar gases is the source of the optical aberrations. Large-scale Reynolds numbers ranged between 3500 and 80000 over pressures from 2 to 6 bar. Light transmission characteristics were first studied qualitatively using a network of thin sheets of short-exposure (approx. l microsec) white light which were aberrated by the mixing layer and then imaged directly onto photographic film. Light transmission characteristics were then studied quantitatively using a lateral effect detector to dynamically track a thin He-Ne laser beam as it wandered under the influence of the passing coherent structures. The study found that the spanwise coherent structures generate systematic deflections of the light beam in the streamwise direction; the greatest deflections occur near the trailing edges of the structures at a formation called the cusp, where the high- speed fluid and low-speed fluid are entrained into the vortex core. The streamwise coherent structures, which form later in the mixing layer's development than the spanwise structures, generate substantial beam deflections in the spanwise direction which are closely associated with the streamwise streaks in plan-view shadowgraphs. ... Aero-optics, Turbulent structure.
Transport And Coherent Structures In Wall Turbulence
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Author : Sedat Tardu
language : en
Publisher: John Wiley & Sons
Release Date : 2014-10-06
Transport And Coherent Structures In Wall Turbulence written by Sedat Tardu and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-06 with Technology & Engineering categories.
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.