Download or read book Transition to Turbulence in Circular Expansion Pipe Flow written by Kamal Selvam and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis deals with numerical and experimental investigations of flow through circular pipes with smaller inlet and larger outlet diameter, also known as expansion pipes. The hydrodynamic expansion pipe flow is globally stable for high Reynolds number. In order to numerically simulate these types of flows, large computational domains that could accommodate the linearly growing symmetric recirculation region is needed. Moreover, experimental studies of expansion pipe flows indicate that the transition occurs at lower Reynolds number than predicted by the linear stability theory. The reason for early transition is due to the presence of imperfections in the experimental setup, which acts as a finite-amplitude perturbation of the flow. Three-dimensional direct numerical simulations of the Navier-Stokes equations with two different types of perturbations (i) the tilt and (ii) the vortex are investigated. First, the tilt perturbation, which applied at the inlet, creates an asymmetric recirculation region and then breaks to form localised turbulence downstream the expansion section. Second, the vortex perturbation, creates structures that looks like lower order azimuthal mode, resembles an optimally amplified perturbation. It grows due to convective instability mechanism and then breaks to form localised turbulence. Spatial correlation and the proper orthogonal decomposition reveal that this localised turbulence gains it energy from the core flow coming out of the inlet pipe.
Download or read book Snapshots of Hemodynamics written by Nico Westerhof and published by Springer Science & Business Media. This book was released on 2006-01-12 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hemodynamics makes it possible to characterize in a quantitative way, the function of the heart and arterial system, thereby producing information about what genetic and molecular processes are of importance for cardiovascular function. Snapshots of Hemodynamics: An Aid for Clinical Research and Graduate Education by Nico Westerhof, Nikos Stergiopulos and Mark I. M. Noble is a quick reference guide designed to help basic and clinical researchers as well as graduate students to understand hemodynamics. The layout of the book provides short and independent chapters that provide teaching diagrams as well as clear descriptions of the essentials of basic and applied principles of hemodynamics. References are provided at the end of each chapter for further reading and reference.
Download or read book Transition from Turbulent to Laminar Pipe Flow written by Merwin Sibulkin and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of low speed pipe flow was conducted for an initially turbulent flow of air. At subcritical Reynolds numbers, as the fluid travelled downstream its velocity profile approached the parabolic distribution corresponding to laminar flow; the rate of transition towards laminar flow being more rapid at lower Reynolds numbers. Concurrent hot-wire-anemometer measurements showed a corresponding dependence on Reynolds number of the rate of decay of the longitudinal velocity fluctuations. These velocity fluctuations were also found to decay more rapidly near the wall and center of the pipe than at intermediate radii. The energy spectrum of the fluctuations was measured along the pipe centerline, and, in terms of the macroscale, these spectra were similar. (Author).
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.
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.
Download or read book Turbulence in Rotating Stratified and Electrically Conducting Fluids written by P. A. Davidson and published by Cambridge University Press. This book was released on 2013-09-12 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are two recurring themes in astrophysical and geophysical fluid mechanics: waves and turbulence. This book investigates how turbulence responds to rotation, stratification or magnetic fields, identifying common themes, where they exist, as well as the essential differences which inevitably arise between different classes of flow. The discussion is developed from first principles, making the book suitable for graduate students as well as professional researchers. The author focuses first on the fundamentals and then progresses to such topics as the atmospheric boundary layer, turbulence in the upper atmosphere, turbulence in the core of the earth, zonal winds in the giant planets, turbulence within the interior of the sun, the solar wind, and turbulent flows in accretion discs. The book will appeal to engineers, geophysicists, astrophysicists and applied mathematicians who are interested in naturally occurring turbulent flows.
Download or read book Turbulence Transition in Pipe Flow written by Holger Faisst and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Manufacturing Processes written by Volodymyr Tonkonogyi and published by Springer Nature. This book was released on 2020-03-27 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a timely yet comprehensive snapshot of innovative research and developments in the area of manufacturing. It covers a wide range of manufacturing processes, such as cutting, coatings, and grinding, highlighting the advantages provided by the use of new materials and composites, as well as new methods and technologies. It discusses topics in energy generation and pollution prevention. It shows how computational methods and mathematical models have been applied to solve a number of issues in both theoretical and applied research. Based on selected papers presented at the Grabchenko’s International Conference on Advanced Manufacturing Processes (InterPartner-2019), held in Odessa, Ukraine on September 10-13, 2019, this book offers a timely overview and extensive information on trends and technologies in the area of manufacturing, mechanical and materials engineering. It is also intended to facilitate communication and collaboration between different groups working on similar topics, and to offer a bridge between academic and industrial researchers.
Download or read book The Practice of Clinical Echocardiography written by Catherine M. Otto and published by Elsevier Health Sciences. This book was released on 2007 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Otto's best-selling text not only explains how to qualitatively and quantitatively interpret echocardiographic images and Doppler flow data, but also outlines how this information affects your clinical decision making. This edition features new chapters on tissue doppler, intracardiac echocardiography, hand-held echocardiography, and echocardiography in inherited connective tissue disorders. A companion DVD offers case-based multiple-choice questions to help you assess your understanding. Whether you are attempting to choose a course of therapy, ascertain the optimal timing for intervention, arrive at a prognosis, or determine the possible need for periodic diagnostic evaluation, this is an essential resource you'll consult time and time again. Delivers clear and concise coverage of the basics of image acquisition that explains the how and why of echocardiography. Reflects the latest technology and standards of practice. Provides a clinically based approach to echocardiography, with an in-depth discussion of the main cardiac events seen in practice, including adult congenital heart disease. Devotes extensive detail to training, education, and quality assurance-making it the most comprehensive text on echocardiography. Includes a practical outline called The Echo Exam at the end of each chapter that presents necessary calculations, diagnoses, and examples along with guidance on how to interpret outcomes. Includes a bonus DVD containing 3 cases and 5 multiple-choice questions for each chapter that test your knowledge of the material. Perfect resource for Residents preparing for the boards. Offers an expanded section on echocardiography techniques that explains the latest applications for all types of practices. Discusses new echocardiography modalities, including contrast and 3-D echocardiography, so you can utilize the most promising new approaches for your patients. Includes new chapters on tissue doppler, intracardiac echocardiography, hand-held echocardiography, and echocardiography in inherited connective tissue disorders. Uses new, full-color line drawings and new color Doppler images to help you easily visualize cardiac problems.
Download or read book Chemical Oscillations Waves and Turbulence written by Y. Kuramoto and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tbis book is intended to provide a few asymptotic methods which can be applied to the dynamics of self-oscillating fields of the reaction-diffusion type and of some related systems. Such systems, forming cooperative fields of a large num of interacting similar subunits, are considered as typical synergetic systems. ber Because each local subunit itself represents an active dynamical system function ing only in far-from-equilibrium situations, the entire system is capable of showing a variety of curious pattern formations and turbulencelike behaviors quite unfamiliar in thermodynamic cooperative fields. I personally believe that the nonlinear dynamics, deterministic or statistical, of fields composed of similar active (Le., non-equilibrium) elements will form an extremely attractive branch of physics in the near future. For the study of non-equilibrium cooperative systems, some theoretical guid ing principle would be highly desirable. In this connection, this book pushes for ward a particular physical viewpoint based on the slaving principle. The dis covery of tbis principle in non-equilibrium phase transitions, especially in lasers, was due to Hermann Haken. The great utility of this concept will again be dem onstrated in tbis book for the fields of coupled nonlinear oscillators.
Download or read book Laminar to Turbulent Transition in Pipe Flow Through Puffs and Slugs written by Mina Nishi and published by . This book was released on 2009 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IUTAM Symposium on Laminar Turbulent Transition and Finite Amplitude Solutions written by Tom Mullin and published by Springer Science & Business Media. This book was released on 2005-12-28 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciting new direction in hydrodynamic stability theory and the transition to turbulence is concerned with the role of disconnected states or finite amplitude solutions in the evolution of disorder in fluid flows. This volume contains refereed papers presented at the IUTAM/LMS sponsored symposium on "Non-Uniqueness of Solutions to the Navier-Stokes equations and their Connection with Laminar-Turbulent Transition" held in Bristol 2004. Theoreticians and experimentalists gathered to discuss developments in understanding both the onset and collapse of disordered motion in shear flows such as those found in pipes and channels. The central objective of the symposium was to discuss the increasing amount of experimental and numerical evidence for finite amplitude solutions to the Navier-Stokes equations and to set the work into a modern theoretical context. The participants included many of the leading authorities in the subject and this volume captures much of the flavour of the resulting stimulating and lively discussions.
Download or read book All Fluid flow regimes Simulation Model for Internal Flows written by John P. Abraham and published by Nova Novinka. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-regime fluid flow model for internal flows has been applied to several pipe and duct problems. The investigated flow regimes and inter-regime transformations include fully laminar and fully turbulent, laminarisation, and turbulentisation. The model auto-selects both the flow regimes and the inter-regime transformations. This book studies both steady and unsteady flows, as well as flows in pipes and ducts of both axially unchanging cross section and axially enlarging cross section.
Download or read book Transition to Turbulence in a Pulsating Pipe Flow written by Raffaella Tuzi and published by . This book was released on 2006 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulence written by Radhey Shyam Srivastava and published by . This book was released on 1977 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transition to Turbulence in Constant Acceleration Pipe Flow written by P. J. Lefebvre and published by . This book was released on 1988 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to present results from the second Naval Underwater Systems Center project on accelerating flows. The main objectives of this second project were to investigate the details of the transition process and to validate the transition correlation parameters developed under the first project. The details of the transition process were investigated using the existing 5-cm-diameter test section, but with one axial location supplemented with additional wall shear stress sensors in an effort to detect the propagation of turbulence. Validation of the previously developed transition correlation parameters was accomplished by conducting constant-acceleration experiments on a new and larger 9-cm-diameter test section. Additionally, transition for mean accelerations lower than those tested previously was investigated on the 9-cm-diameter test section. Fluid mechanics, Accelerating pipe flow. (mjm).
Download or read book Basic Fluid Mechanics written by David C. Wilcox and published by . This book was released on 2000 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
