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Author : T. H. Lê
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (83 download)
Download or read book Numerical Simulation of Vortex Breakdown Via 3-D Euler Equations written by T. H. Lê and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dongbin Xiu
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (437 download)
Download or read book Numerical Simulation of Vortex Breakdown in an Eccentric Spherical Gap written by Dongbin Xiu and published by . This book was released on 1999 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Y. Nakamura
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Simulation of Vortex Breakdown by the Vortex-filament Method written by Y. Nakamura and published by . This book was released on 1983 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vortex-filament method was applied to the simulation of vortex breakdown. The principal vortex region was represented by multiple filaments, and an axial velocity component was induced by a spiral winding of the filaments. First, an accuracy check was performed for a cylindrical swirling flow field that can be simulated to any accuracy by increasing the number of filaments. Second, an axisymmetric-type vortex breakdown was simulated, with experimental data serving asupstream conditions. The calculated axial- and theta-velocity contours show the breakdown of the vortex, including a rapid change in the vortex core, followed axially by a recovery zone and then a second breakdown. When three-dimensional initial data are used the second breakdown appears to be out of the spiral type in correspondence with experimental observations. The present method can easily be used to simulate other types of vortex breakdown or other vortex flows with axial velocity.
Author : Jasim Uddin Ahmad
Publisher :
ISBN 13 :
Total Pages : 318 pages
Book Rating : 4.:/5 (39 download)
Download or read book Numerical Simulation of Vortex Breakdown written by Jasim Uddin Ahmad and published by . This book was released on 1989 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Paul Watson
Publisher :
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4.:/5 (271 download)
Download or read book Numerical Simulation of Vortex Breakdown in an Enclosed Circular Cylinder written by John Paul Watson and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Reid Barlow Melville
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (849 download)
Download or read book Numerical Simulation of Free Vortex Breakdown in Compressible Flow written by Reid Barlow Melville and published by . This book was released on 1996 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mitsuhiro Murayama
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Numerical Simulation of Vortex Breakdown Using Adaptive Grid Refinement with Vortex-center Identification written by Mitsuhiro Murayama and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Steven James Massey
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (38 download)
Download or read book A Direct Numerical Simulation of Vortex Breakdown Induced Tail Buffet written by Steven James Massey and published by . This book was released on 1994 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Elsayed Abdelfattah Shabana
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (54 download)
Download or read book Numerical Simulation of Unsteady Axisymmetric Vortex Breakdown Including Heat Transfer written by Elsayed Abdelfattah Shabana and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (873 download)
Download or read book Numerical Simulation of Vortex Breakdown written by and published by . This book was released on 1978 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex breakdown is simulated by a three dimensional Lagrangian method using vortex filaments. The filaments are approximated by vortex elements and their velocity is computed by a Biot-Savart type law of interaction. The numerical calculations show the development of an axisymmetric bubble with a recirculation zone and resemble in many respects the results obtained in the physical experiments on vortex breakdown.
Author : Miguel R. Visbal
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Numerical Simulation of Spiral Vortex Breakdown Above a Delta Wing written by Miguel R. Visbal and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Simulation of Transient Vortex Breakdown Above a Pitching Delta Wing written by and published by . This book was released on 1994 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational results are presented for transient vortex breakdown above a delta wing subject to a pitch-and-hold maneuver to high angle of attack. The flows are simulated by solving the full three-dimensional Navier-Stokes equations on a moving grid using the implicit Beam-Warming algorithm. An assessment of the effects of numerical resolution, and favorable comparison with experimental data suggest the computational approach captures the basic dynamics of this transient breakdown. The pressure gradient along the vortex axis is found to play a dominant role in the initiation of breakdown. A description of the three-dimensional instantaneous structure of the flow field is provided for the first time using critical-point theory. The reversed-flow region in the vortex core is associated with pairs of opposite spiral/saddle critical points. At its onset, the vortex breakdown is fairly axisymmetric; however, as it proceeds upstream and a stronger transition takes place along the axis, asymmetric effects become important and result in the formation of a bubble-type breakdown. This bubble structure is open and contains within itself a pair of stagnation points which are diametrically opposed and which rotate in the same sense as the base flow. Vortex breakdown, Delta wings, Unsteady aerodynamics, Computational fluid dynamics.
Author : Robert Edward Spall
Publisher :
ISBN 13 :
Total Pages : 268 pages
Book Rating : 4.:/5 (193 download)
Download or read book A Numerical Study of Three-dimensional Vortex Breakdown written by Robert Edward Spall and published by . This book was released on 1987 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Rudolf Ruith
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.:/5 (534 download)
Download or read book Direct Numerical Simulation and Stability Analysis of Three-dimensional Swirling Jets and Wakes Exhibiting Vortex Breakdown written by Michael Rudolf Ruith and published by . This book was released on 2002 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Scott A. Morton
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Simulation of Compressible Vortices written by Scott A. Morton and published by . This book was released on 1989 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: A delta wing at a high angle of attack produces two vortices that generally undergo dramatic increases in core size, followed by the formation of regions of reversed flow. This phenomenon is called vortex breakdown and can have significant effects on the aircraft's lift, drag, and moment coefficients. The objective of this thesis is to provide a base line model of the compressible vortex, independent of the complex body interaction with the delta wing. The mathematical model is then used to simulate vortex breakdown for various vortex strengths, Reynolds numbers, and Mach numbers with particular attention given to the effects of compressibility. After running many simulations it was found that Mach number has a favorable effect by delaying vortex breakdown as defined above. Holding Reynolds number and vortex strength constant while increasing Mach number reduced the effective vortex strength while compressing the flow. Another important result of this compressible flow study was the disappearance of non-unique solutions at Re = 200 and V = 1.0 as Mach number was increased. No paths of non-unique solutions were found for M> 0.2. Keywords: Navier stokes solutions. (KR).
Author : Denis Blackmore
Publisher : World Scientific
ISBN 13 : 9814480452
Total Pages : 299 pages
Book Rating : 4.8/5 (144 download)
Download or read book Vortex Dominated Flows: A Volume Celebrating Lu Ting's 80th Birthday written by Denis Blackmore and published by World Scientific. This book was released on 2005-08-08 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Honoring the contributions of one of the field's leading experts, Lu Ting, this indispensable volume contains important new results at the cutting edge of research. A wide variety of significant new analytical and numerical results in critical areas are presented, including point vortex dynamics, superconductor vortices, cavity flows, vortex breakdown, shock/vortex interaction, wake flows, magneto-hydrodynamics, rotary wake flows, and hypersonic vortex phenomena.The book will be invaluable for those interested in the state of the art of vortex dominated flows, both from a theoretical and applied perspective.Professor Lu Ting and Joe Keller have worked together for over 40 years. In their first joint work entitled “Periodic vibrations of systems governed by nonlinear partial differential equations”, perturbation analysis and bifurcation theory were used to determine the frequencies and modes of vibration of various physical systems. The novelty was the application to partial differential equations of methods which, previously, had been used almost exclusively on ordinary differential equations. Professsor Lu Ting is an expert in both fluid dynamics and the use of matched asymptotic expansions. His physical insight into fluid flows has led the way to finding the appropriate mathematical simplications used in the solutions to many difficult flow problems.
Author : Wing Tsin Ma
Publisher :
ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.E/5 ( download)
Download or read book Direct Numerical Simulations of Highly Vortical Flows and Vortex Breakdown written by Wing Tsin Ma and published by . This book was released on 1995 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
