Bifurcating Jets At High Reynolds Numbers

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Bifurcating Jets at High Reynolds Numbers

Author : D. E. Parekh
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Bifurcating Jets at High Reynolds Numbers by : D. E. Parekh

Download or read book Bifurcating Jets at High Reynolds Numbers written by D. E. Parekh and published by . This book was released on 1988 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is much interest in the use of controlled excitations to manage various types of flows. This work focuses on use of dual-mode forcing to alter dramatically the structure of round turbulent jets. Properly-combined axial and helical excitations can cause a round jet to split into two distinct jets. This Y-shaped jet, known as a bifurcating jet, exhibits spreading angles as high as 80 deg. Vortex rings are formed at the jet exit and propagate along the two branches of the jet. A vortex-filament code was developed for simulating the large-scale features of bifurcating jets. The motion and interaction of the vortex structures in this flow are tracked in a three-dimensional, Lagrangian coordinate system. This simulation showed that inviscid vortex interactions cause the dramatic changes in jet development and that spreading angle increases with axial Strouhal number. The experimental apparatus consists of an acoustically-excited, 2-cm-diameter air jet. The jet evolution is documented by flow visualization at velocities up to 75 m/s, Reynolds numbers up to 100,000, and Mach numbers up to 0.22. Instantaneous and phase-average cross-sections of the jet reveal the effects of forcing amplitude on the structure and spreading angle of axially-excited, helically-excited, and bifurcating jets. The primary conclusions of this experiment are that: 1) Dual-mode acoustic excitation can produce bifurcation in air jets at high Reynolds numbers and that the jet spreading angle increases with both excitation amplitudes; and 2) The excitation amplitude required to produce bifurcation increases with Reynolds number, but the corresponding excitation Strouhal number is invariant. (EDC).

Bifurcating and Blooming Jets

Author : Mario Lee
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Bifurcating and Blooming Jets by : Mario Lee

Download or read book Bifurcating and Blooming Jets written by Mario Lee and published by . This book was released on 1985 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Global Geometry of Turbulence

Author : Javier Jiménez
Publisher : Springer Science & Business Media
ISBN 13 : 1461537509
Total Pages : 359 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis The Global Geometry of Turbulence by : Javier Jiménez

Download or read book The Global Geometry of Turbulence written by Javier Jiménez and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this Advanced Research Workshop was to bring together Physicists, Applied Mathematicians and Fluid Dynamicists, including very specially experimentalists, to review the available knowledge on the global structural aspects of turbulent flows, with an especial emphasis on open systems, and to try to reach a consensus on their possible relationship to recent advances in the understanding of the behaviour of low dimensional dynamical systems and amplitude equations. A lot has been learned during recent years on the non-equilibrium behaviour of low dimen sional dynamical systems, including some fluid flows (Rayleigh-Benard, Taylor-Couette, etc. ). These are mostly closed flows and many of the global structural features of the low dimensional systems have been observed in them, including chaotic behaviour, period doubling, intermit tency, etc. . It has also been shown that some of these flows are intrinsically low dimensional, which accounts for much of the observed similarities. Open flows seem to be different, and experimental observations point to an intrinsic high dimensionality. However, some of the tran sitional features of the low dimensional systems have been observed in them, specially in the intermittent behaviour of subcritical flows (pipes, channels, boundary layers with suction, etc. ), and in the large scale geometry of coherent structures of free shear flows (mixing layers, jets and wakes).

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 988 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Large-Eddy Simulations of Turbulence

Author : M. Lesieur
Publisher : Cambridge University Press
ISBN 13 : 9780521781244
Total Pages : 240 pages
Book Rating : 4.7/5 (812 download)

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Book Synopsis Large-Eddy Simulations of Turbulence by : M. Lesieur

Download or read book Large-Eddy Simulations of Turbulence written by M. Lesieur and published by Cambridge University Press. This book was released on 2005-08-22 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-Eddy Simulations of Turbulence is a reference for LES, direct numerical simulation and Reynolds-averaged Navier-Stokes simulation.

Direct and Large-Eddy Simulation VI

Author : E. Lamballais
Publisher : Springer Science & Business Media
ISBN 13 : 1402051522
Total Pages : 783 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Direct and Large-Eddy Simulation VI by : E. Lamballais

Download or read book Direct and Large-Eddy Simulation VI written by E. Lamballais and published by Springer Science & Business Media. This book was released on 2006-10-19 with total page 783 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sixth ERCOFTAC Workshop on ‘Direct and Large-Eddy Simulation’ (DLES-6) was held at the University of Poitiers from September 12-14, 2005. Following the tradition of previous workshops in the DLES-series, this edition has reflected the state-of-the-art of numerical simulation of transitional and turbulent flows and provided an active forum for discussion of recent developments in simulation techniques and understanding of flow physics.

Manipulation and Control of Jets in Crossflow

Author : Ann R. Karagozian
Publisher : Springer
ISBN 13 : 3709127920
Total Pages : 304 pages
Book Rating : 4.7/5 (91 download)

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Book Synopsis Manipulation and Control of Jets in Crossflow by : Ann R. Karagozian

Download or read book Manipulation and Control of Jets in Crossflow written by Ann R. Karagozian and published by Springer. This book was released on 2014-05-04 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamental Non-Reactive Jets in Crossflow and Other Jet Systems; Background on Modeling, Dynamical Systems, and Control; Reactive Jets in Crossflow and Multiphase Jets; Controlled Jets in Crossflow and Control via Jet Systems;

Fundamental Problematic Issues in Turbulence

Author : Albert Gyr
Publisher : Birkhäuser
ISBN 13 : 3034886896
Total Pages : 464 pages
Book Rating : 4.0/5 (348 download)

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Book Synopsis Fundamental Problematic Issues in Turbulence by : Albert Gyr

Download or read book Fundamental Problematic Issues in Turbulence written by Albert Gyr and published by Birkhäuser. This book was released on 2012-12-06 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of contributions on a variety of mathematical, physical and engineering subjects related to turbulence. Topics include mathematical issues, control and related problems, observational aspects, two- and quasi-two-dimensional flows, basic aspects of turbulence modeling, statistical issues and passive scalars.

Numerical Simulation of Turbulent Jets with Rectangular Cross-Section

Author : Robert V. Wilson
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Numerical Simulation of Turbulent Jets with Rectangular Cross-Section by : Robert V. Wilson

Download or read book Numerical Simulation of Turbulent Jets with Rectangular Cross-Section written by Robert V. Wilson and published by . This book was released on 1997 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three-dimensional turbulent jets with rectangular cross-section are simulated with a finite-difference numerical method. The full Navier-Stokes equations are solved at low Reynolds numbers, whereas at the high Reynolds numbers filtered forms of the equations are solved along with a subgrid scale model to approximate effects of the unresolved scales. A 2-N storage, third-order Runge-Kutta scheme is used for temporal discretization and a fourth-order compact scheme is used for spatial discretization. Computations are performed for different inlet conditions which represent different types of jet forcing. The phenomenon of axis-switching is observed, and it is confirmed that this is based on self-induction of the vorticity field. Budgets of the mean streamwise velocity show that convection is balanced by gradients of the Reynolds stresses and the pressure.

Flow at Ultra-High Reynolds and Rayleigh Numbers

Author : Russell J. Donnelly
Publisher : Springer Science & Business Media
ISBN 13 : 1461222303
Total Pages : 483 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Flow at Ultra-High Reynolds and Rayleigh Numbers by : Russell J. Donnelly

Download or read book Flow at Ultra-High Reynolds and Rayleigh Numbers written by Russell J. Donnelly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists have learned to use liquid and gaseous helium to overcome the limitations imposed by the usual wind and water tunnels for testing the performance of aircraft or the behavior of the atmosphere. This book covers fundamental studies of the turbulence problem, practical applications of turbulence, superfluid turbulence, cryogenic turbulence research, and new types of miniature flow instrumentation, all which are crucial for high Reynolds number research. This state-of-the-art presentation will interest physicists in fluid dynamics, engineers working with turbulent flows, and naval and aerospace engineers testing realistic parameter ranges.

Transition, Turbulence and Combustion Modelling

Author : A. Hanifi
Publisher : Springer Science & Business Media
ISBN 13 : 9401145156
Total Pages : 540 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Transition, Turbulence and Combustion Modelling by : A. Hanifi

Download or read book Transition, Turbulence and Combustion Modelling written by A. Hanifi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This single-volume work gives an introduction to the fields of transition, turbulence, and combustion modeling of compressible flows and provides the physical background for today’s modeling approaches in these fields. It presents basic equations and discusses fundamental aspects of hydrodynamical instability.

Numerical Simulation of Turbulent Jets with Rectangular Cross-section

Author : Robert V. Wilson
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Numerical Simulation of Turbulent Jets with Rectangular Cross-section by : Robert V. Wilson

Download or read book Numerical Simulation of Turbulent Jets with Rectangular Cross-section written by Robert V. Wilson and published by . This book was released on 1997 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993

Author : M.D. Kelleher
Publisher : Elsevier
ISBN 13 : 044459860X
Total Pages : 1002 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993 by : M.D. Kelleher

Download or read book Experimental Heat Transfer, Fluid Mechanics and Thermodynamics 1993 written by M.D. Kelleher and published by Elsevier. This book was released on 2012-12-02 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers contained in this volume reflect the ingenuity and originality of experimental work in the areas of fluid mechanics, heat transfer and thermodynamics. The contributors are drawn from 27 countries which indicates how well the worldwide scientific community is networked. The papers cover a broad spectrum from the experimental investigation of complex fundamental physical phenomena to the study of practical devices and applications. A uniform outline and method of presentation has been used for each paper.

Direct and Large-Eddy Simulation IV

Author : Bernard Geurts
Publisher : Springer Science & Business Media
ISBN 13 : 9401712638
Total Pages : 543 pages
Book Rating : 4.4/5 (17 download)

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Book Synopsis Direct and Large-Eddy Simulation IV by : Bernard Geurts

Download or read book Direct and Large-Eddy Simulation IV written by Bernard Geurts and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the 2001 DLES4 workshop. It describes and discusses state-of-the-art modeling and simulation approaches for complex flows. Fundamental turbulence and modeling issues but also elements from modern numerical analysis are at the heart of this field of interest.

Technical Reports Awareness Circular : TRAC.

Author :
Publisher :
ISBN 13 :
Total Pages : 594 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Technical Reports Awareness Circular : TRAC. by :

Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1989-05 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Parallel Computational Fluid Dynamics 2000

Author : C.B. Jenssen
Publisher : Gulf Professional Publishing
ISBN 13 : 0080538401
Total Pages : 604 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Parallel Computational Fluid Dynamics 2000 by : C.B. Jenssen

Download or read book Parallel Computational Fluid Dynamics 2000 written by C.B. Jenssen and published by Gulf Professional Publishing. This book was released on 2001-04-27 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parallel CFD 2000, the Twelfth in an International series of meetings featuring computational fluid dynamics research on parallel computers, was held May 22-25, 2000 in Trondheim, Norway. Following the trend of the past conferences, areas such as numerical schemes and algorithms, tools and environments, load balancing, as well as interdisciplinary topics and various kinds of industrial applications were all well represented in the work presented. In addition, for the first time in the Parallel CFD conference series, the organizing committee chose to draw special attention to certain subject areas by organizing a number of special sessions. We feel the emphasis of the papers presented at the conference reflect the direction of the research within parallel CFD at the beginning of the new millennium. It seems to be a clear tendency towards increased industrial exploitation of parallel CFD. Several presentations also demonstrated how new insight is being achieved from complex simulations, and how powerful parallel computers now make it possible to use CFD within a broader interdisciplinary setting. Obviously, successful application of parallel CFD still rests on the underlying fundamental principles. Therefore, numerical algorithms, development tools, and parallelization techniques are still as important as when parallel CFD was in is infancy. Furthermore, the novel concepts of affordable parallel computing as well as metacomputing show that exciting developments are still taking place. As is often pointed out however, the real power of parallel CFD comes from the combination of all the disciplines involved: Physics, mathematics, and computer science. This is probably one of the principal reasons for the continued popularity of the Parallel CFD Conferences series, as well as the inspiration behind much of the excellent work carried out on the subject. We hope that the papers in this book, both on an individual basis and as a whole, will contribute to that inspiration. Further details of Parallel CFD'99, as well as other conferences in this series, are available at http://www.parcfd.org

Flow Control

Author : Thomas C. Corke
Publisher : Cambridge University Press
ISBN 13 : 1108832369
Total Pages : 481 pages
Book Rating : 4.1/5 (88 download)

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Book Synopsis Flow Control by : Thomas C. Corke

Download or read book Flow Control written by Thomas C. Corke and published by Cambridge University Press. This book was released on 2024-04-30 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive treatment flow control in fluid dynamics, with emphasis on utilizing fluid instabilities for enhancing control performance.