Download or read book Bluff Body Wakes Dynamics and Instabilities written by Helmut Eckelmann and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bluff-body wakes play an important role in many fluid dynamics problems and engineering applications. This book gives and up-to-date account of recent results obtained in the study of bluff-body wakes. Experimental, theoretical and numerical approaches are all comprehensively covered and compared. Topics of particular interest include hydrodynamic instability analyses, three-dimensional pattern formation problems, flow control methods, bifurcation analyses, numerical simulations and turbulence modelling. The main originality of thisvolume is that recent conceptual advances made to describe nonlinear phenomena in general are put to the test on a classical problem in fundamental fluid mechanics, namely the wake structure generated behind a bluff object.
Download or read book 2547 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Twenty First Symposium on Naval Hydrodynamics written by National Research Council and published by National Academies Press. This book was released on 1997-09-11 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics and Control of Bluff body wake structure Interaction written by Negar Nabatian and published by . This book was released on 2014 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid-structure interaction is encountered in most of the engineering and industrial flow applications. The interaction can lead to generation of undesirable forces acting on structures and causing fatigue or damage. One approach to understanding the fundamental wake flow dynamics and stability is to conduct simulations using forced oscillation of a cylinder. Two aspects of such a flow are considered. The first is the dependence of vortex shedding pattern symmetries on the forced oscillation amplitude, forcing frequency ratios and the direction of the oscillation relative to flow direction. The forced oscillation, depending on the amplitude and frequency of the oscillation, causes formation of various patterns which have specific symmetries. Numerical simulations and stability analysis are employed to determine the unstable wake flow modes and their bifurcations. The forced inline oscillation of a circular cylinder is studied to predict the wake modes over a prescribed range of amplitudes and frequencies. The two-dimensional numerical computations of the Navier-Stokes equations are performed using forced periodic boundary condition method in the range of forcing-to-shedding frequency ratios / [1 2] e s f f ; covering the harmonic and superharmonic excitation regimes with amplitude ratio in the range A/ DÎ[0-0.5]. Symmetric and asymmetric lock-on modes are observed for three different oscillation amplitudes and frequency ratios. The asymmetric 2S mode when / 1 e s f f = for A/D=[0.35-0.5], P+S mode at / 1.5 e s f f = for A/D=[0.175,0.5] and S mode at / 2 e s f f = for A/D=[0.175,0.5] are confirmed. Due to the nonlinearity of the Navier-Stokes équations and the complexity of the infinite dimensional flow dynamics, the primary modes are calculated by the proper orthogonal decomposition (POD) tool. A Galerkin procedure is the used to project the Navier-Stokes equations onto a low-dimensional space spanned by the first two POD modes. This method reduces the problem size from an infinite-dimensional space to a finite number of modes (degree-offreedom)representing the wake dynamics. The vortex shedding dominant modes are invariant Under their symmetry groups. The equivariant bifurcation theory is employed to develop the low order model using the symmetry properties of the primary modes. Thus, equivariant bifurcation and normal form theories are combined with numerical computations of the Navier-Stokes equations to precisely describe the spatio-temporal properties of the wake flow modes and their bifurcations. A linear analysis of the analytical low order model near the bifurcation point is performed to predict the bifurcation sequences observed in simulations.
Download or read book Unsteady Combustor Physics written by Tim C. Lieuwen and published by Cambridge University Press. This book was released on 2012-08-27 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing clean, sustainable energy systems is a pre-eminent issue of our time. Most projections indicate that combustion-based energy conversion systems will continue to be the predominant approach for the majority of our energy usage. Unsteady combustor issues present the key challenge associated with the development of clean, high-efficiency combustion systems such as those used for power generation, heating or propulsion applications. This comprehensive study is unique, treating the subject in a systematic manner. Although this book focuses on unsteady combusting flows, it places particular emphasis on the system dynamics that occur at the intersection of the combustion, fluid mechanics and acoustic disciplines. Individuals with a background in fluid mechanics and combustion will find this book to be an incomparable study that synthesises these fields into a coherent understanding of the intrinsically unsteady processes in combustors.
Download or read book Dynamics of Spatio Temporal Cellular Structures written by Innocent Mutabazi and published by Springer Science & Business Media. This book was released on 2005-12-15 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impact of Benard's discovery on 20th century physics is crucial to any modern research area such as fluid dynamics, nonlinear dynamics, and non-equilibrium thermodynamics, just to name a few. This centenary review shows the broad scope and development including modern applications, edited and written by experts in the field.
Download or read book Hydrodynamic Instability and Transition to Turbulence written by Akiva M. Yaglom and published by Springer Science & Business Media. This book was released on 2012-12-18 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a complete revision of the part of Monin & Yaglom's famous two-volume work "Statistical Fluid Mechanics: Mechanics of Turbulence" that deals with the theory of laminar-flow instability and transition to turbulence. It includes the considerable advances in the subject that have been made in the last 15 years or so. It is intended as a textbook for advanced graduate courses and as a reference for research students and professional research workers. The first two Chapters are an introduction to the mathematics, and the experimental results, for the instability of laminar (or inviscid) flows to infinitesimal (in practice "small") disturbances. The third Chapter develops this linear theory in more detail and describes its application to particular problems. Chapters 4 and 5 deal with instability to finite-amplitude disturbances: much of the material has previously been available only in research papers.
Download or read book Numerical Study of a Hydrodynamic Instability Excitation for Bluff Body Wake Control written by Sunil Kumar Reddy Patil and published by . This book was released on 2007 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental and Computational Fluid Mechanics written by Jaime Klapp and published by Springer Science & Business Media. This book was released on 2013-12-23 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects invited lectures and selected contributions presented at the Enzo Levi and XVIII Annual Meeting of the Fluid Dynamic Division of the Mexican Physical Society in 2012. It is intended for fourth-year undergraduate and graduate students, and for scientists in the fields of physics, engineering and chemistry with an interest in Fluid Dynamics from experimental, theoretical and computational points of view. The invited lectures are introductory in nature and avoid the use of complicated mathematics. The other selected contributions are also suitable for fourth-year undergraduate and graduate students. The Fluid Dynamics applications include oceanography, multiphase flows, convection, diffusion, heat transfer, rheology, granular materials, viscous flows, porous media flows and astrophysics. The material presented in the book includes recent advances in experimental and computational fluid dynamics and is well-suited to both teaching and research.
Download or read book Unsteady Combustor Physics written by Tim C. Lieuwen and published by Cambridge University Press. This book was released on 2021-10-21 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore a unified treatment of the dynamics of combustor systems, including acoustics, fluid mechanics, and combustion in a single rigorous text. This updated new edition features an expansion of data and experimental material, updates the coverage of flow stability, and enhanced treatment of flame dynamics. Addresses system dynamics of clean energy and propulsion systems used in low emissions systems. Synthesizing the fields of fluid mechanics and combustion into a coherent understanding of the intrinsically unsteady processes in combustors. This is a perfect reference for engineers and researchers in fluid mechanics, combustion, and clean energy.
Download or read book Flow Induced Vibration written by S. Ziada and published by CRC Press. This book was released on 2000-01-01 with total page 863 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow-induced vibrations and noise continue to cause problems in a wide range of engineering applications ranging from civil engineering and marine structures to power generation and chemical processing. These proceedings bring together more than a hundred papers dealing with a variety of topics relating to flow-induced vibration and noise. The cont
Download or read book Bluff body fluid and Hydraulic Machine Interactions written by M. P. Paidoussis and published by . This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Office of Naval Research Guide to Programs written by United States. Office of Naval Research and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Office of Naval Research written by United States. Office of the Chief of Naval Research and published by . This book was released on 1990 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Office of Naval Research Guide to Programs written by United States. Office of the Chief of Naval Research and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IUTAM written by Peter Eberhard and published by Springer. This book was released on 2016-07-20 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents extensive information related to the history of IUTAM. The initial chapters focus on IUTAM’s history and selected organizational aspects. Subsequent chapters provide extensive data and statistics, while the closing section showcases photos from all periods of the Union’s history. The history of IUTAM, the International Union on Theoretical and Applied Mechanics, began at a conference in 1922 in Innsbruck, Austria, where von Kármán put forward the idea of an international congress including the whole domain of applied mechanics. In 1946 IUTAM was then formally launched in Paris/France. IUTAM has since time organized more than 24 world congresses and 380 symposia, representing all fields of mechanics and highlighting advances by prominent international researchers. The efforts of IUTAM and its about 50 member countries serve to promote the mechanical sciences and the advancement of human society, addressing many key challenges. In this context, IUTAM preserves important traditions while at the same time recognizing new challenges and adapting its structures and processes accordingly. The first edition of this book was published in 1988. This new book now offers an updated and completely revised edition reflecting the substantial developments in the interim.
Download or read book Three dimensional Structure in Laminar and Turbulent Wakes written by Anil Prasad and published by . This book was released on 1996 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
