The Three-Dimensional Evolution of a Plane Mixing Layer. Part 1

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Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722831561
Total Pages : 90 pages
Book Rating : 4.8/5 (315 download)

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Book Synopsis The Three-Dimensional Evolution of a Plane Mixing Layer. Part 1 by : National Aeronautics and Space Administration (NASA)

Download or read book The Three-Dimensional Evolution of a Plane Mixing Layer. Part 1 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kelvin Helmholtz roll up of three dimensional, temporally evolving, plane mixing layers were simulated numerically. All simulations were begun from a few low wavenumber disturbances, usually derived from linear stability theory, in addition to the mean velocity profile. The spanwise disturbance wavelength was taken to be less than or equal to the streamwise wavelength associated with the Kelvin Helmholtz roll up. A standard set of clean structures develop in most of the simulations. The spanwise vorticity rolls up into a corrugated spanwise roller, with vortex stretching creating strong spanwise vorticity in a cup shaped region at the vends of the roller. Predominantly streamwise rib vortices develop in the braid region between the rollers. For sufficiently strong initial three dimensional disturbances, these ribs collapse into compact axisymmetric vortices. The rib vortex lines connect to neighboring ribs and are kinked in the opposite direction of the roller vortex lines. Because of this, these two sets of vortex lines remain distinct. For certain initial conditions, persistent ribs do not develop. In such cases the development of significant three dimensionality is delayed. When the initial three dimensional disturbance energy is about equal to, or less than, the two dimensional fundamental disturbance energy, the evolution of the three dimensional disturbance is nearly linear (with respect to the mean and the two dimensional disturbances), at least until the first Kelvin Helmholtz roll up is completed. Rogers, Michael M. and Moser, Robert D. Ames Research Center...

The Three-dimensional Evolution of a Plane Mixing Layer. Part 1: The Kelvin-Helmholtz Roll-up

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ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis The Three-dimensional Evolution of a Plane Mixing Layer. Part 1: The Kelvin-Helmholtz Roll-up by :

Download or read book The Three-dimensional Evolution of a Plane Mixing Layer. Part 1: The Kelvin-Helmholtz Roll-up written by and published by . This book was released on 1991 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Three-dimensional Evolution of a Plane Mixing Layer. Part 2: Pairing and Transition to Turbulence

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ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis The Three-dimensional Evolution of a Plane Mixing Layer. Part 2: Pairing and Transition to Turbulence by :

Download or read book The Three-dimensional Evolution of a Plane Mixing Layer. Part 2: Pairing and Transition to Turbulence written by and published by . This book was released on 1992 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (3 download)

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Theoretical and Applied Mechanics 1992

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Publisher : Elsevier
ISBN 13 : 044460023X
Total Pages : 492 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Theoretical and Applied Mechanics 1992 by : S.R. Bodner

Download or read book Theoretical and Applied Mechanics 1992 written by S.R. Bodner and published by Elsevier. This book was released on 2012-12-02 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contained in this volume are the full texts of the invited general and sectional lectures presented at this conference concerning mechanics and its development. The entire field of mechanics is covered, including analytical, solid and fluid mechanics and their applications. A brilliant survey of work in the fields of fluid and solid mechanics is also given. The papers are written by leading experts which is reflected in the quality and diversity of the lectures and posters presented, they will provide a valuable key to the latest and most important developments in the various sub-fields of mechanics.

Handbook of Environmental Fluid Dynamics, Volume One

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Publisher : CRC Press
ISBN 13 : 1439816697
Total Pages : 638 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Handbook of Environmental Fluid Dynamics, Volume One by : Harindra Joseph Fernando

Download or read book Handbook of Environmental Fluid Dynamics, Volume One written by Harindra Joseph Fernando and published by CRC Press. This book was released on 2012-12-12 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: With major implications for applied physics, engineering, and the natural and social sciences, the rapidly growing area of environmental fluid dynamics focuses on the interactions of human activities, environment, and fluid motion. A landmark for the field, the two-volume Handbook of Environmental Fluid Dynamics presents the basic principles, fundamental flow processes, modeling techniques, and measurement methods used in the study of environmental motions. It also offers critical discussions of environmental sustainability related to engineering. The handbook features 81 chapters written by 135 renowned researchers from around the world. Covering environmental, policy, biological, and chemical aspects, it tackles important cross-disciplinary topics such as sustainability, ecology, pollution, micrometeorology, and limnology. Volume One: Overview and Fundamentals provides a comprehensive overview of the basic principles. It starts with general topics that emphasize the relevance of environmental fluid dynamics research in society, public policy, infrastructure, quality of life, security, and the law. It then discusses established and emerging focus areas. The volume also examines the sub-mesoscale flow processes and phenomena that form the building blocks of environmental motions, with emphasis on turbulent motions and their role in heat, momentum, and species transport. As communities face existential challenges posed by climate change, rapid urbanization, and scarcity of water and energy, the study of environmental fluid dynamics becomes increasingly relevant. This volume is a valuable resource for students, researchers, and policymakers working to better understand the fundamentals of environmental motions and how they affect and are influenced by anthropogenic activities. See also Handbook of Environmental Fluid Dynamics, Two-Volume Set and Volume Two: Systems, Pollution, Modeling, and Measurements.

Applied Mechanics Reviews

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Publisher :
ISBN 13 :
Total Pages : 932 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Applied Mechanics Reviews by :

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1980 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications

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ISBN 13 :
Total Pages : 846 pages
Book Rating : 4.:/5 (891 download)

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Monthly Catalogue, United States Public Documents

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ISBN 13 :
Total Pages : 1388 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Monthly Catalogue, United States Public Documents by :

Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1992-11 with total page 1388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Environmental Fluid Dynamics, Two-Volume Set

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Publisher : CRC Press
ISBN 13 : 1466591145
Total Pages : 1197 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Handbook of Environmental Fluid Dynamics, Two-Volume Set by : Harindra Joseph Fernando

Download or read book Handbook of Environmental Fluid Dynamics, Two-Volume Set written by Harindra Joseph Fernando and published by CRC Press. This book was released on 2012-12-11 with total page 1197 pages. Available in PDF, EPUB and Kindle. Book excerpt: With major implications for applied physics, engineering, and the natural and social sciences, the rapidly growing area of environmental fluid dynamics focuses on the interactions of human activities, environment, and fluid motion. A landmark for the field, this two-volume handbook presents the basic principles, fundamental flow processes, modeling techniques, and measurement methods used in the field, along with critical discussions of environmental sustainability related to engineering aspects. The first volume provides a comprehensive overview of the fundamentals, and the second volume explores the interactions between engineered structures and natural flows.

Plant Disturbance Ecology

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Publisher : Academic Press
ISBN 13 : 0128188146
Total Pages : 564 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Plant Disturbance Ecology by : Edward A. Johnson

Download or read book Plant Disturbance Ecology written by Edward A. Johnson and published by Academic Press. This book was released on 2020-10-21 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disturbance ecology continues to be an active area of research, having undergone advances in many areas in recent years. One emerging direction is the increased coupling of physical and ecological processes, in which disturbances are increasingly traced back to mechanisms that cause the disturbances themselves, such as earth surface processes, mesoscale, and larger meteorological processes, and the ecological effects of interest are increasingly physiological. Plant Disturbance Ecology, 2nd Edition encourages movement away from the informal, conceptual approach traditionally used in defining natural disturbances and clearly presents how scientists can use a multitude of approaches in plant disturbance ecology. This edition includes nine revised chapters from the first edition, as well new, more comprehensive chapters on fire disturbance and beaver disturbance. Edited by leading experts in the field, Plant Disturbance Ecology, 2nd Edition is an essential resource for scientists interested in understanding plant disturbance and ecological processes. - Advances understanding of natural disturbances by combining geophysical and ecological processes - Provides a framework for collaboration between geophysical scientists and ecologists studying natural disturbances - Includes fully updated research with 5 new chapters and revision of 11 chapters from the first edition

Turbulence and Transition Modelling

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Publisher : Springer Science & Business Media
ISBN 13 : 9401586667
Total Pages : 379 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Turbulence and Transition Modelling by : M. Hallbäck

Download or read book Turbulence and Transition Modelling written by M. Hallbäck and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to give, within a single volume, an introduction to the fields of turbulence modelling and transition-to-turbulence prediction, and to provide the physical background for today's modelling approaches in these problem areas as well as giving a flavour of advanced use of prediction methods. Turbulence modelling approaches, ranging from single-point models based on the eddy-viscosity concept and the Reynolds stress transport equations (Chapters 3,4,5), to large-eddy simulation (LES) techniques (Ch. 7), are covered. The foundations of hydrodynamical stability and transition are presented (Ch. 2) along with transition prediction methods based on single-point closures (Ch. 6), LES techniques (Ch. 7) and the parabolized stability equations (Ch. 8). The book addresses engineers and researchers, in industry or academia, who are entering into the fields of turbulence or transition modelling research or need to apply turbulence or transition prediction methods in their work.

Mixing and Dispersion in Stably Stratified Flows

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Publisher : Oxford University Press
ISBN 13 : 9780198500155
Total Pages : 668 pages
Book Rating : 4.5/5 (1 download)

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Book Synopsis Mixing and Dispersion in Stably Stratified Flows by : P. A. Davies

Download or read book Mixing and Dispersion in Stably Stratified Flows written by P. A. Davies and published by Oxford University Press. This book was released on 1999 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stratified flows are important in determining how various atmospheric and environmental processes occur. The book investigates these processes and focuses on the methods by which pollutants are mixed and dispersed in natural and industrial environments.

Government Reports Announcements & Index

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ISBN 13 :
Total Pages : 1396 pages
Book Rating : 4.E/5 ( download)

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Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1994 with total page 1396 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High-Speed Flight Propulsion Systems

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Publisher : AIAA
ISBN 13 : 9781600863912
Total Pages : 558 pages
Book Rating : 4.8/5 (639 download)

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Book Synopsis High-Speed Flight Propulsion Systems by : S. N. B. Murthy

Download or read book High-Speed Flight Propulsion Systems written by S. N. B. Murthy and published by AIAA. This book was released on 1991 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Leading researchers provide a cohesive treatment of the complex issues in high-speed propulsion, as well as introductions to the current capabilities for addressing several fundamental aspects of high-speed vehicle propulsion development. Includes more than 380 references, 290 figures and tables, and 185 equations.

Direct and Large-Eddy Simulation I

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Publisher : Springer Science & Business Media
ISBN 13 : 940111000X
Total Pages : 438 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Direct and Large-Eddy Simulation I by : Peter R. Voke

Download or read book Direct and Large-Eddy Simulation I written by Peter R. Voke and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.

Energy Research Abstracts

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ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.0/5 ( download)

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1993-08 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: