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Author : Chenning Tong
Publisher :
ISBN 13 :
Total Pages : 352 pages
Book Rating : 4.E/5 ( download)
Download or read book Passive Scalar Dispersion and Mixing in Isotropic Grid Turbulence and in a Turbulent Jet written by Chenning Tong and published by . This book was released on 1995 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. Shirani
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (317 download)
Download or read book Mixing of a Passive Scalar in Isotropic and Sheared Homogeneous Turbulence written by E. Shirani and published by . This book was released on 1981 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to calculate the velocity and passive scalar fields in homogeneous turbulent flows, the three-dimensional, time-dependent equations of motion and the diffusion equation have been solved numerically.
Download or read book Passive Scalar Mixing in Compressible, Isotropic Turbulence written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ebrahim Shirani-Chaharsughi
Publisher :
ISBN 13 :
Total Pages : 157 pages
Book Rating : 4.:/5 (386 download)
Download or read book Mixing of a Passive Scalar in Isotropic and Sheared Homogeneous Turbulence written by Ebrahim Shirani-Chaharsughi and published by . This book was released on 1981 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Shuyi Xu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (66 download)
Download or read book Turbulent Mixing of Passive Scalars at High Schmidt Number written by Shuyi Xu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study of fundamental aspects of turbulent mixing has been performed, with emphasis on the behavior of passive scalars of low molecular diffusivity (high Schmidt number Sc). Direct Numerical Simulation is used to simulate incompressible, stationary and isotropic turbulence carried out at high grid resolution. Data analyses are carried out by separate parallel codes using up to 10243 grid points for Taylor-scale Reynolds number (R(lambda) up to 390 and Sc up to 1024. Schmidt number of order 1000 is simulated using a double-precision parallel code in a turbulent flow at a low Reynolds number of R (lambda) 8 to reduce computational cost to achievable level. The results on the scalar spectrum at high Schmidt numbers appear to have a ...
Author : Robert McDougall Kerr
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.E/5 ( download)
Download or read book Theoretical Investigation of a Passive Scalar Such as Temperature in Isotropic Turbulence written by Robert McDougall Kerr and published by . This book was released on 1981 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andrew Pollard
Publisher : Springer Science & Business Media
ISBN 13 : 9401719985
Total Pages : 454 pages
Book Rating : 4.4/5 (17 download)
Download or read book IUTAM Symposium on Turbulent Mixing and Combustion written by Andrew Pollard and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of the Symposium were to draw together researchers in turbulence and combustion so as to highlight advances and challenge the boundaries to our understanding of turbulent mixing and combus tion from both experimental and simulation perspectives; to facilitate cross-fertilization between leaders in these two fields. These goals were noted to be important given that turbulence itself is viewed as the last great problem in classical physics and the addition of chemical reaction amplifies the difficulties enormously. The papers that have been included here reflect the richness of our subject. Turbulence is rich and complex in its own right. And, its inner structure, hidden in the morass of scales, large and small, can dominate transport. Earlier IUTAM Symposia have considered this field, Eddy Structure Identification in Free Turbulent Flows, Bonnet and Glauser (eds) 1992 and Simulation and Identification of Organized Structures in Flows, Sorensen, Hopfinger and Aubry (eds) 1997. The combustion community is well served by its specialized events, most notable is the bi annual International Combustion Symposium, held under the auspices of the Combustion Institute. Mixing is often considered somewhere in between these two. This broad landscape was addressed in this Sym posium in a somewhat temporal linear fashion of increasing complexity. The lectures considered the many challenges posed by adding one ele ment to the base formed by others: turbulence and turbulent mixing in the absence of combustion through to turbulent mixing dominated by chemistry and combustion.
Author : Fernando F. Grinstein
Publisher : Cambridge University Press
ISBN 13 : 1316571742
Total Pages : 481 pages
Book Rating : 4.3/5 (165 download)
Download or read book Coarse Grained Simulation and Turbulent Mixing written by Fernando F. Grinstein and published by Cambridge University Press. This book was released on 2016-06-30 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small-scale turbulent flow dynamics is traditionally viewed as universal and as enslaved to that of larger scales. In coarse grained simulation (CGS), large energy-containing structures are resolved, smaller structures are spatially filtered out, and unresolved subgrid scale (SGS) effects are modeled. Coarse Grained Simulation and Turbulent Mixing reviews our understanding of CGS. Beginning with an introduction to the fundamental theory the discussion then moves to the crucial challenges of predictability. Next, it addresses verification and validation, the primary means of assessing accuracy and reliability of numerical simulation. The final part reports on the progress made in addressing difficult non-equilibrium applications of timely current interest involving variable density turbulent mixing. The book will be of fundamental interest to graduate students, research scientists, and professionals involved in the design and analysis of complex turbulent flows.
Author : C.L. Lubbers
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)
Download or read book Simulation of the Mixing of a Passive Scalar in a Free Round Turbulent Jet written by C.L. Lubbers and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen B. Pope
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Experiments on Turbulent Mixing written by Stephen B. Pope and published by . This book was released on 1988 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixing in simple turbulent flows has been investigating using 64 cubed and 128 cubed Direct Numerical Simulations. In turbulent combustion, mixing by molecular transport is an essential process that is not well understood. Because mixing occurs on the smallest length and time scales it is difficult to study experimentally. Instead, we have employed direct numerical simulation of turbulence, initially for a conserved passive scalar in homogeneous isotropic turbulence. The Eulerian velocity and scalar fields are calculated from the exact evolution equations, and both Eulerian and Lagrangian statistics are deduced from the computed fields. A particle-tracking scheme, needed to extract Lagrangian information, has been implemented. The testing of a number of such particle tracking schemes has been completed with good results: accurate Lagrangian information can be extracted at a modest computational cost. In order to study processes in stationary turbulence, a forcing algorithm has been implemented. Tests on this scheme are complete, again with good results: the small scales are unaffected by the details of the forcing. Studies have been performed of: the mixing of a passive scalar; Lagrangian velocity, Acceleration and dissipation statistics; and Mixing and combustion problems viewed in terms of surfaces.
Author :
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.:/5 (26 download)
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1971 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F.C.G.A. Nicolleau
Publisher : Springer Science & Business Media
ISBN 13 : 940072506X
Total Pages : 159 pages
Book Rating : 4.4/5 (7 download)
Download or read book New Approaches in Modeling Multiphase Flows and Dispersion in Turbulence, Fractal Methods and Synthetic Turbulence written by F.C.G.A. Nicolleau and published by Springer Science & Business Media. This book was released on 2011-10-29 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains a collection of the main contributions from the first five workshops held by Ercoftac Special Interest Group on Synthetic Turbulence Models (SIG42. It is intended as an illustration of the sig’s activities and of the latest developments in the field. This volume investigates the use of Kinematic Simulation (KS) and other synthetic turbulence models for the particular application to environmental flows. This volume offers the best syntheses on the research status in KS, which is widely used in various domains, including Lagrangian aspects in turbulence mixing/stirring, particle dispersion/clustering, and last but not least, aeroacoustics. Flow realizations with complete spatial, and sometime spatio-temporal, dependency, are generated via superposition of random modes (mostly spatial, and sometime spatial and temporal, Fourier modes), with prescribed constraints such as: strict incompressibility (divergence-free velocity field at each point), high Reynolds energy spectrum. Recent improvements consisted in incorporating linear dynamics, for instance in rotating and/or stably-stratified flows, with possible easy generalization to MHD flows, and perhaps to plasmas. KS for channel flows have also been validated. However, the absence of "sweeping effects" in present conventional KS versions is identified as a major drawback in very different applications: inertial particle clustering as well as in aeroacoustics. Nevertheless, this issue was addressed in some reference papers, and merits to be revisited in the light of new studies in progress.
Author : Ory D. Selzer
Publisher :
ISBN 13 :
Total Pages : 646 pages
Book Rating : 4.:/5 (468 download)
Download or read book The Effect of Initial Scalar Size on the Mixing of a Passive Scalar in Grid-generated Turbulence written by Ory D. Selzer and published by . This book was released on 2001 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniel Livescu
Publisher : Springer Nature
ISBN 13 : 9811526435
Total Pages : 273 pages
Book Rating : 4.8/5 (115 download)
Download or read book Modeling and Simulation of Turbulent Mixing and Reaction written by Daniel Livescu and published by Springer Nature. This book was released on 2020-02-19 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent research advances in the area of turbulent flows from both industry and academia for applications in the area of Aerospace and Mechanical engineering. Contributions include modeling, simulations and experiments meant for researchers, professionals and students in the area.
Author : H. Chaté
Publisher : Springer Science & Business Media
ISBN 13 :
Total Pages : 416 pages
Book Rating : 4.3/5 (91 download)
Download or read book Mixing written by H. Chaté and published by Springer Science & Business Media. This book was released on 1999 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: A host of international scholars gathered for the NATO Advanced Studies Institute to discuss questions arising from the study of mixing. Although mixing does not have a reputation for being very scientific, the articles in this book analyze it in a scientific manner from the approaches of geometry, kinetics, and structure, addressing questions involving the characterization of the geometry of complex patterns, the time-scale of a process, and the structures involved in the flow. Annotation copyrighted by Book News, Inc., Portland, OR.
Author : Abdullah MohammadFarid N. Alkudsi
Publisher :
ISBN 13 : 9781267711274
Total Pages : 184 pages
Book Rating : 4.7/5 (112 download)
Download or read book Effect of Length Scales on the Mixing of Passive Scalars in Grid Turbulence written by Abdullah MohammadFarid N. Alkudsi and published by . This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of passive scalars in turbulence research is a technologically important topic. This study seeks to investigate the effect of the variation of integral length scale, and scalar injector size and separation on turbulent mixing. The study is motivated by devices such as the simple gas turbine pre-mixer where these three relevant length scales are present. Heated wakes of different sizes and separations are produced by heating various sets of thin wires in a horizontal wire grid. The horizontal wire screen is placed downstream of biplane grids of different mesh sizes. Time-resolved velocity and temperature are measured by a dual hot and cold wire probe. Assessments of the effect of the array of thin wires used as the scalar generator on the velocity and scalar fields behind the turbulence grid are presented. The evolution of the profiles of the first four statistical moments of temperature fluctuations across the wake with downstream distance is studied for various scalar injector size and separation for several integral length scales. Specifically, the downstream evolution of a single thermal wake is studied for source sizes that range from less than the Kolmogorov to larger than the integral length scale. Also included in the study the downstream evolution and interaction of two thermal wakes is also presented. For the single wake, the wake growth, sufficiently far from the generator, for all source sizes is found to be consistent with the assumption that the effective diffusivity is constant across the wake. The evolution of the effective diffusivity with downstream distance is found to be independent of the source size and identical to the evolution of the effective diffusivity of a line source in the same velocity field. The effects of changing the velocity integral scale are governed by the effect of the integral scale on the evolution of the effective turbulent diffusivity. Those effects are found to be similar in character to the effect on a line source. The mean scalar of two sources is found to be the sum of the mean of the individual sources. Higher statistical moments show more complex relationships.
Author : Olivier Metais
Publisher : Springer Science & Business Media
ISBN 13 : 3662089750
Total Pages : 312 pages
Book Rating : 4.6/5 (62 download)
Download or read book New Tools in Turbulence Modelling written by Olivier Metais and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical large-eddy simulation techniques are booming at present and will have a decisive impact on industrial modeling and flow control. The book represents the general framework in physical and spectral space. It also gives the recent subgrid-scale models. Topics treated include compressible turbulence research, turbulent combustion, acoustic predictions, vortex dynamics in non-trivial geometries, flows in nuclear reactors and problems in atmospheric and geophysical sciences. The book addresses numerical analysts, physicists, and engineers.
