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Author : Sanjay Vinayak Sherikar
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (19 download)
Download or read book Experimental Study of Vortex Structure in a Plane Mixing Layer written by Sanjay Vinayak Sherikar and published by . This book was released on 1987 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Garry L. Brown
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (227 download)
Download or read book Structure of the Turbulent Mixing Layer written by Garry L. Brown and published by . This book was released on 1972 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an experimental study of turbulent mixing between two streams of different density are summarized. The effects of density difference in flows at low Mach number are compared to those due to compressibility effects at high Mach number. The mixing layer at low Mach number is examined for large vortex structures. (Author).
Author : José L. Stevens
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.F/5 ( download)
Download or read book Experimental Study of Vortex Breakdown in a Cylindrical, Swirling Flow written by José L. Stevens and published by . This book was released on 1996 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sheldon Green
Publisher : Springer Science & Business Media
ISBN 13 : 940110249X
Total Pages : 905 pages
Book Rating : 4.4/5 (11 download)
Download or read book Fluid Vortices written by Sheldon Green and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 905 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid Vortices is a comprehensive, up-to-date, research-level overview covering all salient flows in which fluid vortices play a significant role. The various chapters have been written by specialists from North America, Europe and Asia, making for unsurpassed depth and breadth of coverage. Topics addressed include fundamental vortex flows (mixing layer vortices, vortex rings, wake vortices, vortex stability, etc.), industrial and environmental vortex flows (aero-propulsion system vortices, vortex-structure interaction, atmospheric vortices, computational methods with vortices, etc.), and multiphase vortex flows (free-surface effects, vortex cavitation, and bubble and particle interactions with vortices). The book can also be recommended as an advanced graduate-level supplementary textbook. The first nine chapters of the book are suitable for a one-term course; chapters 10--19 form the basis for a second one-term course.
Author : A. Roshko
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Plane Mixing Layer Flow Visualization Results and Three Dimensional Effects written by A. Roshko and published by . This book was released on 1980 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The turbulent mixing layer between two streams of different velocities continues to play a central role in research aimed at improved understanding of turbulent shear flows in general. At present, not all researchers are in agreement as to what various experiments imply about the structure of mixing layers at high Reynolds number. The views which are held differ on the question as to how and to what extent three dimensionality develops in these flows and whether the characteristic spanwise organized large vortex structures (rollers) continue to be a dominant feature. The traditional view, as extended to the contemporary scene, is that ultimately (i.e., sufficiently far downstream or at sufficiently high Reynolds number) the flow will be completely disorganized. The view put forward by 'eddy chasers' is that such vortex structures are primary elements, characteristic of the underlying mean vorticity field, which is particularly simple for the mixing layer, and that, as long as the velocity difference is maintained, there is a mechanism to regenerate these primary structures by what, for convenience, may be called a Kelvin-Helmholtz instability. The heart of the controversy then is whether, or to what extent, secondary and higher instabilities will ultimately break down, completely disorganize or prevent formation of organized primary structures. In a plane mixing layer, the primary structures would, ideally, be two dimensional, containing the basic single component of vorticity while secondary and higher modes of instability would introduce three dimensionality and the other two components of vorticity into the flow. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Bureau of Standards
Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.3/5 ( download)
Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pauline H. Gurewitz
Publisher :
ISBN 13 :
Total Pages : 384 pages
Book Rating : 4.:/5 (31 download)
Download or read book Hydraulic Research in the United States and Canada, 1976 written by Pauline H. Gurewitz and published by . This book was released on 1978 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F. K. Browand
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (227 download)
Download or read book The Structure of the Turbulent Mixing Layer written by F. K. Browand and published by . This book was released on 1986 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent experimental results describing the vortical structure of the mixing layer are reviewed. The largest turbulent features are quasi two-dimensional vortices aligned along the span of the flow. As a result of interactions, the vortices rapidly develop an invariant space-time geometry. Superimposed on this vortex structure are smaller scales which include longitudinal vortices of size comparable to the Taylor microscale, and smaller scales which considerably enhance molecular mixing. These smaller scales coexist with the quasi two dimensional structure. At present, no theoretical framework is available to describe the geometrical features of these complex shear flows. (Reprints).
Author : Sophie Rüttinger
Publisher : Cuvillier Verlag
ISBN 13 : 3736989407
Total Pages : 154 pages
Book Rating : 4.7/5 (369 download)
Download or read book Investigation of the influence of vortex structures on transport processes at fluidic interfaces written by Sophie Rüttinger and published by Cuvillier Verlag. This book was released on 2018-12-28 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass transfer across interfaces plays a crucial role in many process engineering applications. This experimental study deals with the scientific question how vortex structures influence boundary layer dynamics in gas-liquid systems. By means of a methodical series of experiments, the impact of momentum transporting vortices on hydrodynamics and mass transfer is systematically analyzed.
Author :
Publisher :
ISBN 13 :
Total Pages : 520 pages
Book Rating : 4.3/5 (91 download)
Download or read book NBS Special Publication written by and published by . This book was released on 1978 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chiun Wang
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (493 download)
Download or read book The Effects of Curvature on Turbulent Mixing Layers written by Chiun Wang and published by . This book was released on 1984 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental studies have been conducted in a curved mixing layer in which both the velocity ratio and the density ratio were variable. Flow visualization studies and profile measurements covered a wide range of experimental conditions. The structures observed experimentally were examined in the light of three different instability mechanisms which can exist in the same mean flow. For the case of mixing layers with uniform density, it was found that the normal large spanwise vortex structures can be weakened or inhibited by Taylor-Goertler instability if the inner stream is faster than the outer stream. For the case of mixing layers with different densities, three-dimensionality is greatly enhanced by Rayleigh-Taylor instability if the inner stream is heavier than the outer stream, and especially if the inner stream is also faster. In the former case the growth rate of the mixing layer was found to be insensitive to changes in the velocity ratio. The effects of curvature on the structure of the curved turbulent mixing layer were explored in terms of length scales and celerity for the large spanwise structures where these structures could be observed. Other things being equal, the celerity of the large structres was found to depend on density ratio and velocity ratio but not on the sense of the mean streamline curvature. (Author).
Author :
Publisher :
ISBN 13 :
Total Pages : 400 pages
Book Rating : 4.3/5 (243 download)
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gerhard H. Jirka
Publisher : CRC Press
ISBN 13 : 9780203027325
Total Pages : 692 pages
Book Rating : 4.0/5 (273 download)
Download or read book Shallow Flows written by Gerhard H. Jirka and published by CRC Press. This book was released on 2004-09-15 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents the key findings of the International Symposium held in Delft in 2003, which explored the process of shallow flows. Shallow flows are found in lowland rivers, lakes, estuaries, bays, coastal areas and in density-stratified atmospheres, and may be observed in puddles, as in oceans. They impact on the life and work of a w
Author :
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Experimental Investigation of the Formation of Secondary Vortices and the Generation of Small-Scale Motion in a Spanwise Forced Plane Mixing Layer written by and published by . This book was released on 1992 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of spanwise instability modes and 3-D pulsed disturbances leading to the formation of streamwise vortices in a plane mixing layer and subsequently to the onset of small-scale 3-D motion were studied in a closed-return water facility. Streamwise vortices may result from a spanwise core instability of the primary vortices, or a spanwise instability of the nominally 2-D strain field between them. These two instability modes were excited by time-harmonic wavetrains with spanwise phase or amplitude variations, respectively, synthesized by a mosaic of surface film heaters flush-mounted on the flow partition. The appearance of the streamwise vortices is accompanied by significant distortion in the transverse distribution of the streamwise velocity component. Inflection points, which are not present in corresponding velocity distributions of the unforced flow, indicate the formation of locally unstable regions of large shear in which broadband perturbations already present in the base flow undergo rapid amplification which is followed by breakdown to turbulence and mixing transition. The core instability of the primary vortices suggests itself as viable mechanism for the continuation of the mixing process far downstream of mixing transition. Pulsed excitation was produced by pulsed spanwise amplitude modulation of a spanwise-uniform time-harmonic carrier wave train synthesized by the surface film heaters. Schlieren visualization showed that the disturbance spreads rapidly in the streamwise and lateral directions as it is advected downstream, and causes a substantial distortion of the adjacent spanwise vortices.
Author : Franz Durst
Publisher : Springer Science & Business Media
ISBN 13 : 3642760872
Total Pages : 370 pages
Book Rating : 4.6/5 (427 download)
Download or read book Turbulent Shear Flows 7 written by Franz Durst and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Seventh Symposium was held on the campus of Stanford University with·a combination offacilities and weather which made it possible to add open-air poster sessions and coffee breaks to the programme. This was particularly convenient as the call for papers attracted close to three hundred abstracts and a total number of participants well in excess of this number. Some one hundred and thirty papers were presented in carefully phased parallel sessions and thirty six further contributions were made available in the form of posters. In addition, a lively open-forum session allowed additional speakers to make brief presentations. The staff of the Thermo-Sciences Division of the Department of Mechanical Engineering at Stanford undertook the local arrangements with evident success and their extensive record of contributions to Turbulent Shear Flows made the venue particularly appropriate. Also, the Centre for Turbulence Studies, based on the faculty of the University and the NASA Ames Research Center, provided a considerable body of expertise with emphasis on direct numerical stimulation.
Author : Hans-Hermann Fernholz
Publisher : Springer Science & Business Media
ISBN 13 : 3642838227
Total Pages : 528 pages
Book Rating : 4.6/5 (428 download)
Download or read book Advances in Turbulence 2 written by Hans-Hermann Fernholz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second European Turbulence Conference was held at the Technische Univer sitat Berlin, Federal Republic of Germany, from August 30th to September 2nd 1988 under the auspices of the European Mechanics Committee. It was primar ily devoted to fundamental aspects of turbulence, and aimed at bringing together engineers, physicists, and mathematicians. The scientific committee - serving also as Sub-committee of the European Turbulence Conference - consisted of the following members: G. Comte-Bellot (Lyon), H.-H. Fernholz and H.E. Fiedler (both from Berlin) as co-chairmen of the conference, U. Frisch (Nice), J.C.R. Hunt (Cambridge), E. Krause (Aachen), M. Landahl (Stockholm), A.M. Obukhov (Moscow), and G. Ooms (Amsterdam). The conference programme comprised 6 invited lectures and 94 contributions, presented either orally or at poster sessions. There were 165 participants from 18 countries. All papers published in these conference proceedings were, with the exception of the invited ones, again refereed by the members of the scientific committee. The main research topics discussed at this meeting were stability and gener ation of turbulence, effects of rotation, stratification and buoyancy forces, novel instrumentation, manipulation and control, boundary layers with separation and reattachment, computer simulation, turbulent diffusion, image analysis and flow visualization, vorticity dynamics and turbulence, and large-scale structures. We have taken the liberty of regrouping some papers following the submitted final versions for this volume. Authors may therefore find their paper under a different heading from that in the conference programme.
