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Author : Tao-ting Hsu
Publisher :
ISBN 13 :
Total Pages : 170 pages
Book Rating : 4.:/5 (29 download)
Download or read book Local Reynolds Number to Predict Transition from Laminar to Turbulent Flow written by Tao-ting Hsu and published by . This book was released on 1958 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mustafa Serdar Genç
Publisher : BoD – Books on Demand
ISBN 13 : 9535104926
Total Pages : 176 pages
Book Rating : 4.5/5 (351 download)
Download or read book Low Reynolds Number written by Mustafa Serdar Genç and published by BoD – Books on Demand. This book was released on 2012-04-04 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports the latest development and trends in the low Re number aerodynamics, transition from laminar to turbulence, unsteady low Reynolds number flows, experimental studies, numerical transition modelling, control of low Re number flows, and MAV wing aerodynamics. The contributors to each chapter are fluid mechanics and aerodynamics scientists and engineers with strong expertise in their respective fields. As a whole, the studies presented here reveal important new directions toward the realization of applications of MAV and wind turbine blades.
Author : Neal Tetervin
Publisher :
ISBN 13 :
Total Pages : 81 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Estimate of the Minimum Reynolds Number for Transition from Laminar to Turbulent Boundarylayer Flow by Means of Energy Considerations written by Neal Tetervin and published by . This book was released on 1960 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a turbulent flow both the viscous and the Reynolds shearing stresses dissipate mean-flow mechanical energy whereas, in a laminar flow, the Reynolds shearing stresses are absent; the rate of dissipation of both types of flow varies with the Reynolds number. Because the total dissipation of mechanical energy in a turbulent flow is large enough to supply both the viscous and the Reynolds stress dissipation, it is inferred that transition cannot begin unless the Reynolds number is large enough for the rate of dissipation of the turbulent flow to exceed that of the laminar flow. This concept leads to the criterion for the calculation of the minimum Reynolds number for transition in a boundary layer, namely, that the laminar- and turbulent-friction coefficients be equal. The minimum Reynolds number based on the boundary-layer momentum thickness is estimated to be about 44 for incompressible flow over a flat plate. For an insulated plate, this number rises to 214 at a Mach number of 10. Computations of the effect of pressure gradient indicate that a favorable pressure gradient causes a small increase in the minimum Reynolds number for transition. (Author).
Author : G. A. Tokaty
Publisher : Courier Corporation
ISBN 13 : 0486152650
Total Pages : 277 pages
Book Rating : 4.4/5 (861 download)
Download or read book A History and Philosophy of Fluid Mechanics written by G. A. Tokaty and published by Courier Corporation. This book was released on 2013-02-20 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through the centuries, the intricacies of fluid mechanics — the study of the laws of motion and fluids in motion — have occupied many of history's greatest minds. In this pioneering account, a distinguished aeronautical scientist presents a history of fluid mechanics focusing on the achievements of the pioneering scientists and thinkers whose inspirations and experiments lay behind the evolution of such disparate devices as irrigation lifts, ocean liners, windmills, fireworks and spacecraft. The author first presents the basics of fluid mechanics, then explores the advances made through the work of such gifted thinkers as Plato, Aristotle, da Vinci, Galileo, Pascal, Newton, Bernoulli, Euler, Lagrange, Ernst Mach and other scientists of the 20th century. Especially important for its illuminating comparison of the development of fluid mechanics in the former Soviet Union with that in the West, the book concludes with studies of transsonic compressibility and aerodynamics, supersonic fluid mechanics, hypersonic gas dynamics and the universal matter-energy continuity. Professor G. A. Tokaty has headed the prestigious Aeronautical Research Laboratory at the Zhukovsky Academy of Aeronautics in Moscow, and has taught at the University of California, Los Angeles. He is Emeritus Professor of Aeronautics and Space Technology, The City University, London.
Author : Hermann Schlichting (Deceased)
Publisher : Springer
ISBN 13 : 366252919X
Total Pages : 814 pages
Book Rating : 4.6/5 (625 download)
Download or read book Boundary-Layer Theory written by Hermann Schlichting (Deceased) and published by Springer. This book was released on 2016-10-04 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.
Author : A.V. Boiko
Publisher : Springer Science & Business Media
ISBN 13 : 3662047659
Total Pages : 273 pages
Book Rating : 4.6/5 (62 download)
Download or read book The Origin of Turbulence in Near-Wall Flows written by A.V. Boiko and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Origin of Species Charles Darwin The origin of turbulence in fluids is a long-standing problem and has been the focus of research for decades due to its great importance in a variety of engineering applications. Furthermore, the study of the origin of turbulence is part of the fundamental physical problem of turbulence description and the philosophical problem of determinism and chaos. At the end of the nineteenth century, Reynolds and Rayleigh conjectured that the reason of the transition of laminar flow to the 'sinuous' state is in stability which results in amplification of wavy disturbances and breakdown of the laminar regime. Heisenberg (1924) was the founder of linear hydrody namic stability theory. The first calculations of boundary layer stability were fulfilled in pioneer works of Tollmien (1929) and Schlichting (1932, 1933). Later Taylor (1936) hypothesized that the transition to turbulence is initi ated by free-stream oscillations inducing local separations near wall. Up to the 1940s, skepticism of the stability theory predominated, in particular due to the experimental results of Dryden (1934, 1936). Only the experiments of Schubauer and Skramstad (1948) revealed the determining role of insta bility waves in the transition. Now it is well established that the transition to turbulence in shear flows at small and moderate levels of environmental disturbances occurs through development of instability waves in the initial laminar flow. In Chapter 1 we start with the fundamentals of stability theory, employing results of the early studies and recent advances.
Author : Geoff Hewitt
Publisher : Cambridge University Press
ISBN 13 : 9780521838993
Total Pages : 366 pages
Book Rating : 4.8/5 (389 download)
Download or read book Prediction of Turbulent Flows written by Geoff Hewitt and published by Cambridge University Press. This book was released on 2005-06-08 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prediction of turbulent flows is of paramount importance in the development of complex engineering systems involving flow, heat and mass transfer, and chemical reactions. Arising from a programme held at the Isaac Newton Institute in Cambridge, this volume reviews the current situation regarding the prediction of such flows through the use of modern computational fluid dynamics techniques, and attempts to address the inherent problem of modelling turbulence. In particular, the current physical understanding of such flows is summarised and the resulting implications for simulation discussed. The volume continues by surveying current approximation methods whilst discussing their applicability to industrial problems. This major work concludes by providing a specific set of guidelines for selecting the most appropriate model for a given problem. Unique in its breadth and critical approach, this book will be of immense value to experienced practitioners and researchers, continuing the UK's strong tradition in fluid dynamics.
Author :
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.:/5 (319 download)
Download or read book NASA Technical Note written by and published by . This book was released on 1975 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Childs
Publisher : Elsevier
ISBN 13 : 0123820995
Total Pages : 415 pages
Book Rating : 4.1/5 (238 download)
Download or read book Rotating Flow written by Peter Childs and published by Elsevier. This book was released on 2010-10-29 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating flow is critically important across a wide range of scientific, engineering and product applications, providing design and modeling capability for diverse products such as jet engines, pumps and vacuum cleaners, as well as geophysical flows.Developed over the course of 20 years’ research into rotating fluids and associated heat transfer at the University of Sussex Thermo-Fluid Mechanics Research Centre (TFMRC), Rotating Flow is an indispensable reference and resource for all those working within the gas turbine and rotating machinery industries.Traditional fluid and flow dynamics titles offer the essential background but generally include very sparse coverage of rotating flows—which is where this book comes in. Beginning with an accessible introduction to rotating flow, recognized expert Peter Childs takes you through fundamental equations, vorticity and vortices, rotating disc flow, flow around rotating cylinders and flow in rotating cavities, with an introduction to atmospheric and oceanic circulations included to help deepen understanding.Whilst competing resources are weighed down with complex mathematics, this book focuses on the essential equations and provides full workings to take readers step-by-step through the theory so they can concentrate on the practical applications. A detailed yet accessible introduction to rotating flows, illustrating the differences between flows where rotation is significant and highlighting the non-intuitive nature of rotating flow fields Written by world-leading authority on rotating flow, Peter Childs, making this a unique and authoritative work Covers the essential theory behind engineering applications such as rotating discs, cylinders, and cavities, with natural phenomena such as atmospheric and oceanic flows used to explain underlying principles Provides a rigorous, fully worked mathematical account of rotating flows whilst also including numerous practical examples in daily life to highlight the relevance and prevalence of different flow types Concise summaries of the results of important research and lists of references included to direct readers to significant further resources
Author : Siegfried Wagner
Publisher : Springer Science & Business Media
ISBN 13 : 3540450602
Total Pages : 334 pages
Book Rating : 4.5/5 (44 download)
Download or read book Recent Results in Laminar-Turbulent Transition written by Siegfried Wagner and published by Springer Science & Business Media. This book was released on 2013-06-05 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 24 papers presented at the international concluding colloquium of the German priority programme (DFG-Verbundschwerpunktprogramm) "Transition", held in April 2002 in Stuttgart. The unique and successful programme ran six years, starting April 1996, and was sponsored mainly by the Deutsche Forschungsgemeinschaft, DFG, but also by the Deutsches Zentrum für Luft-und Raumfahrt, DLR, the Physikalisch-Technische Bundesanstalt Braunschweig, PTB, and Airbus Deutschland. The papers summarise the results of the programme and cover transition mechanisms, transition prediction, transition control, natural transition and measurement techniques, transition - turbulence - separation, and visualisation issues. Three invited papers are devoted to mechanisms of turbulence production, to a general framework of stability, receptivity and control, and a forcing model for receptivity analysis. Almost every transition topic arising in subsonic and transonic flow is covered.
Author : Julius E. Harris
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (31 download)
Download or read book Numerical Solution of the Equations for Compressible Laminar, Transitional, and Turbulent Boundary Layers and Comparisons with Experimental Data written by Julius E. Harris and published by . This book was released on 1971 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical method for solving the equations for laminar, transitional, and turbulent compressible boundary layers for either planar or axisymmetric flows is presented. The fully developed turbulent region is treated by replacing the Reynolds stress terms with an eddy viscosity model. The mean properties of the transitional boundary layer are calculated by multiplying the eddy viscosity by an intermittency function based on the statistical production and growth of the turbulent spots. A specifiable turbulent Prandtl number relates the turbulent flux of heat to the eddy viscosity. A three-point implicit finite-difference scheme is used to solve the system of equations. The momentum and energy equations are solved simultaneously without iteration. Numerous test cases are compared with experimental data for supersonic and hypersonic flows; these cases include flows with both favorable and mildly unfavorable pressure gradient histories, mass flux at the wall, and traverse curvature.
Author : A. H. P. Skelland
Publisher :
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.3/5 (91 download)
Download or read book Non-Newtonian Flow and Heat Transfer written by A. H. P. Skelland and published by . This book was released on 1967 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Laurence
Publisher : Elsevier
ISBN 13 : 0080530982
Total Pages : 975 pages
Book Rating : 4.0/5 (85 download)
Download or read book Engineering Turbulence Modelling and Experiments - 4 written by D. Laurence and published by Elsevier. This book was released on 1999-04-14 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain the papers presented at the 4th International Symposium on Engineering Turbulence Modelling and Measurements held at Ajaccio, Corsica, France from 24-26 May 1999. It follows three previous conferences on the topic of engineering turbulence modelling and measurements. The purpose of this series of symposia is to provide a forum for presenting and discussing new developments in the area of turbulence modelling and measurements, with particular emphasis on engineering-related problems. Turbulence is still 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 more and more on the performance of the turbulence models. Successful simulation of turbulence requires the understanding of the complex physical phenomena involved and suitable models for describing the turbulent momentum, heat and mass transfer. For the understanding of turbulence phenomena, experiments are indispensable, but they are equally important for providing data for the development and testing of turbulence models and hence for CFD software validation.
Author : Alexander J. Smits
Publisher : Springer Science & Business Media
ISBN 13 : 9781402017759
Total Pages : 344 pages
Book Rating : 4.0/5 (177 download)
Download or read book IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow written by Alexander J. Smits and published by Springer Science & Business Media. This book was released on 2003-12-31 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers from the IUTAM Symposium on Reynolds Number Scaling in Turbulent Flow, convened in Princeton, NJ, USA, September I1-13, 2002. The behavior ofturbulence at high Reynolds number is interesting from a fundamental point of view, in that most theories of turbulence make very specific predictions in the limit of infinite Reynolds number. From a more practical point of view, there exist many applications that involve turbulent flow where the Reynolds numbers are extremely large. For example, large vehicles such as submarines and commercial transports operate at Reynolds 9 numbers based on length ofthe order oft0 , and industrial pipe flows cover a 7 very wide range of Reynolds numbers up to 10 • Many very important applications of high Reynolds number flow pertain to atmospheric and other geophysical flows where extremely high Reynolds numbers are the rule rather than the exception, and the understanding of climate changes and the prediction of destructive weather effects hinges to some extent on our appreciation ofhigh-Reynolds number turbulence behavior. The important effects of Reynolds number on turbulence has received a great deal of recent attention. The objective of the Symposium was to bring together many of the world's experts in this area to appraise the new experimental results, discuss new scaling laws and turbulence models, and to enhance our mutual understanding of turbulence.
Author : Satish Kandlikar
Publisher : Elsevier
ISBN 13 : 9780080445274
Total Pages : 492 pages
Book Rating : 4.4/5 (452 download)
Download or read book Heat Transfer and Fluid Flow in Minichannels and Microchannels written by Satish Kandlikar and published by Elsevier. This book was released on 2006 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: &Quot;This book explores flow through passages with hydraulic diameters from about 1 [mu]m to 3 mm, covering the range of minichannels and microchannels. Design equations along with solved examples and practice problems are also included to serve the needs of practicing engineers and students in a graduate course."--BOOK JACKET.
Author : VDI Gesellschaft
Publisher : Springer Science & Business Media
ISBN 13 : 3540778764
Total Pages : 1608 pages
Book Rating : 4.5/5 (47 download)
Download or read book VDI Heat Atlas written by VDI Gesellschaft and published by Springer Science & Business Media. This book was released on 2010-07-21 with total page 1608 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 50 years, the Springer VDI Heat Atlas has been an indispensable working means for engineers dealing with questions of heat transfer. Featuring 50% more content, this new edition covers most fields of heat transfer in industrial and engineering applications. It presents the interrelationships between basic scientific methods, experimental techniques, model-based analysis and their transfer to technical applications.
Author : Paul S. Granville
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Prediction of Transition from Laminar to Turbulent Flow in Boundary Layers on Bodies of Revolution written by Paul S. Granville and published by . This book was released on 1974 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing methods for predicting transition from laminar to turbulent flow in boundary layers on smooth bodies of revolution immersed in axisymmetric flows with very low background turbulence are examined critically. Several are compared to available experimental results. A new correlation is then proposed which incorporates not only the usual effect of pressure gradients but also the effect of axisymmetric spreading of the boundary layer on the location of transition. (Author).
