Further Developments In Turbulence Management
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Further Developments In Turbulence Management
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Author : K. Krishna Prasad
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Further Developments In Turbulence Management written by K. Krishna Prasad 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 Technology & Engineering categories.
The thrust of modern research on turbulence in fluids is concerned with coherent structures and modelling. Riblets have been shown to reduce drag, and the papers presented in this volume tackle the main question of the mechanism responsible for this behaviour in turbulent flow. The contributions in this volume were presented at the Sixth Drag Reduction Meeting held at Eindhoven during November 1991. This volume will be a useful reference work for engineers, physicists and applied mathematicians interested in the topic of fluid turbulence.
Further Developments In Turbulence Management
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Author : K Krishna Prasad
language : en
Publisher: Springer
Release Date : 2014-01-15
Further Developments In Turbulence Management written by K Krishna Prasad and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-01-15 with categories.
Recent Developments In Turbulence Management
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Author : K.-S. Choi
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Recent Developments In Turbulence Management written by K.-S. Choi 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 Technology & Engineering categories.
The European Drag Reduction Meeting has been held on 15th and 16th November 1990 in London. This was the fifth of the annual European meetings on drag reduction in engineering flows. The main objective of this meeting was to discuss up-to-date results of drag reduction research carried out in Europe. The organiser has adopted the philosophy of discussing the yesterday's results rather than the last year's results. No written material has therefore been requested for the meeting. It was only after the meeting the submission of papers was requested to the participants, from which 16 papers were selected for this proceedings volume. The meeting has attracted a record number of participants with a total of 52 researchers from seven European countries, U. K. , France, Germany, the Netherlands, Italy, Switzerland and U. S. S. R. as well as from Japan, Canada and Australia. The subjects covered in this proceedings volume include riblets, LEBUs (Large Eddy Break-Up device), surface roughness, compliant surfaces and polymer additives. Riblets seem to be one of the most extensively studied devices in the past years. Reflecting this situation in the European community, there are six papers on riblets covering their practical applications to aircraft and to a model ship, near-wall coherent structure of the boundary layer and effects of flow three-dimensionality. Possibility of heat-transfer enhancement with riblets and potential use in the laminar flow are also investigated. An analytical model is developed for the boundary-layer with a LEBU device.
Engineering Turbulence Modelling And Experiments 5
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Author : W. Rodi
language : en
Publisher: Elsevier
Release Date : 2002-08-21
Engineering Turbulence Modelling And Experiments 5 written by W. Rodi and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-08-21 with Mathematics categories.
Turbulence is one of the key issues in tackling engineering flow problems. As powerful computers and accurate numerical methods are now available for solving the flow equations, and since engineering applications nearly always involve turbulence effects, the reliability of CFD analysis depends increasingly on the performance of the turbulence models. This series of symposia provides a forum for presenting and discussing new developments in the area of turbulence modelling and measurements, with particular emphasis on engineering-related problems. The papers in this set of proceedings were presented at the 5th International Symposium on Engineering Turbulence Modelling and Measurements in September 2002. They look at a variety of areas, including: Turbulence modelling; Direct and large-eddy simulations; Applications of turbulence models; Experimental studies; Transition; Turbulence control; Aerodynamic flow; Aero-acoustics; Turbomachinery flows; Heat transfer; Combustion systems; Two-phase flows. These papers are preceded by a section containing 6 invited papers covering various aspects of turbulence modelling and simulation as well as their practical application, combustion modelling and particle-image velocimetry.
New Trends In Turbulence Turbulence Nouveaux Aspects
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Author : M. Lesieur
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-07-01
New Trends In Turbulence Turbulence Nouveaux Aspects written by M. Lesieur 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 2003-07-01 with Science categories.
Following a longstanding tradition of the Les Houches Summer Schools, this book uses a pedagogically presented and accessible style to treat 2D and 3D turbulence from the experimental, theoretical and computational points of view.
Turbulence Management And Relaminarisation
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Author : H.W. Liepmann
language : en
Publisher: Springer
Release Date : 2011-12-27
Turbulence Management And Relaminarisation written by H.W. Liepmann and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-12-27 with Science categories.
The last two decades have witnessed an intensifying effort in learning how to manage flow turbulence: it has in fact now become one of the most challenging and prized techno logical goals in fluid dynamics. The goal itself is of course not new. More than a hundred years ago, Reynolds already listed factors conducive to laminar and to turbulent flow (including among them curvature and acceleration). Further more, it is in retrospect clear that there were several early instances ot successful turbulence management. Examples are the reduction in drag achieved with a ring-trip placed on the front of a sphere or the insertion of a splitter-plate behind a circular cylinder; by the early 1950s there were numerous exercises at boundary layer control. Although many of these studies were interesting and suggestive, they led . to no spectacularly successful practical application, and the effort petered out in the late 1950s. The revival of interest in these problems in recent years can be attributed to the emergence of several new factors. First of all, fresh scientific insight into the structure of turbulence, in particular the accumulated evidence for the presence of significant order in turbulent flow, has been seen to point to new methods of managing turbulence. A second major reason has been the growing realisation that the rate at which the world is consuming its reserves of fossil fuels is no longer negligible; the economic value of greater energy effi ciency and lower drag has gone up significantly.
Turbulence Management And Relaminarisation
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Author : Hans Wolfgang Liepmann
language : en
Publisher: Springer Verlag
Release Date : 1988
Turbulence Management And Relaminarisation written by Hans Wolfgang Liepmann and has been published by Springer Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Technology & Engineering categories.
Mastering Turbulence
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Author : Joseph McCann
language : en
Publisher: John Wiley & Sons
Release Date : 2012-07-10
Mastering Turbulence written by Joseph McCann 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 2012-07-10 with Business & Economics categories.
The essential capabilities organizations need to master turbulent change Rapid and disruptive change threatens the adaptive capacity of organizations, along with the individuals and teams leading them. Based upon over a decade of global research and consulting, Joseph E. McCann and John W. Selsky outline five capabilities highly agile and resilient systems must possess. They must be: Purposeful, Aware, Action-Oriented, Resourceful, and Networked. In addition the authors illustrate how these capabilities can be assessed across four levels—individuals, teams, organizations, and their business ecosystems. The goal is to develop these capabilities in tandem so that the individual, team, organization and ecosystem have High AR—not just greater agility or resiliency, but both high agility and high resiliency. The authors outline balanced development strategies for creating High AR that can be used to master turbulent environments for competitive advantage and sustained performance Includes cutting-edge concepts and examples that take readers from the latest advances in neuro-science and executive wellness to global supply chains and innovation strategy Contains illustrative examples and vignettes from leading organizations including Mayo Clinic, Microsoft, Starbucks, Southwest Airlines, TECO Energy, Shell Oil, Walmart, and others Most important, McCann, and Selsky deliver a unique and practical perspective that helps organization leaders make sense of the dynamic world in which they operate.
Soaring Through Turbulence
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Author : Michael M. Sears
language : en
Publisher:
Release Date : 2004
Soaring Through Turbulence written by Michael M. Sears and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Industrial management categories.
In Soaring Through Turbulence, Boeing CFO Mike Sears show how managers can weather any turbulent time. In the vein of Gordon Bethune's From Worst to First, this book is written in response to the recent economic shakeup all businesses have had to endure at the beginning of the 21st century.
Advancements In Engineering Turbulence Modeling
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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-08-20
Advancements In Engineering Turbulence Modeling written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-08-20 with categories.
Some new developments in two-equation models and second order closure models are presented. Two-equation models (k-epsilon models) have been widely used in computational fluid dynamics (CFD) for engineering problems. Most of low-Reynolds number two-equation models contain some wall-distance damping functions to account for the effect of wall on turbulence. However, this often causes the confusion and difficulties in computing flows with complex geometry and also needs an ad hoc treatment near the separation and reattachment points. A set of modified two-equation models is proposed to remove the aforementioned shortcomings. The calculations using various two-equation models are compared with direct numerical simulations of channel flow and flat boundary layers. Development of a second order closure model is also discussed with emphasis on the modeling of pressure related correlation terms and dissipation rates in the second moment equations. All the existing models poorly predict the normal stresses near the wall and fail to predict the 3-D effect of mean flow on the turbulence (e.g. decrease in the shear stress caused by the cross flow in the boundary layer). The newly developed second order near-wall turbulence model is described and is capable of capturing the near-wall behavior of turbulence as well as the effect of 3-D mean flow on the turbulence. Shih, T.-H. Glenn Research Center ...