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Author :
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (317 download)
Download or read book Vortex Methods for Separated Flows written by and published by . This book was released on 1988 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Georges-Henri Cottet
Publisher : Cambridge University Press
ISBN 13 : 9780521061704
Total Pages : 0 pages
Book Rating : 4.0/5 (617 download)
Download or read book Vortex Methods written by Georges-Henri Cottet and published by Cambridge University Press. This book was released on 2008-04-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the past three decades, research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. At the same time vortex methods retain their appealing physical character, which was the motivation for their introduction. This book presents and analyzes vortex methods as a tool for the direct numerical simulation of impressible viscous flows. It will interest graduate students and researchers in numerical analysis and fluid mechanics and also serve as an ideal textbook for courses in fluid dynamics.
Author : Kyoji Kamemoto
Publisher : World Scientific
ISBN 13 : 9814493287
Total Pages : 228 pages
Book Rating : 4.8/5 (144 download)
Download or read book Vortex Methods: Selected Papers Of The First International Conference On Vortex Methods written by Kyoji Kamemoto and published by World Scientific. This book was released on 2000-05-11 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have been developed and applied to many kinds of flows related to various problems in wide engineering and scientific fields. The purpose of the First International conference on Vortex methods was to provide an opportunity for engineers and scientists to present their achievements, exchange ideas and discuss new developments in mathematical and physical modeling techniques and engineering applications of vortex methods.
Author : Petros D. Koumoutsakos
Publisher :
ISBN 13 :
Total Pages : 348 pages
Book Rating : 4.:/5 (437 download)
Download or read book Direct Numerical Simulations of Unsteady Separated Flows Using Vortex Methods written by Petros D. Koumoutsakos and published by . This book was released on 1993 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Radcliff Anderson
Publisher : American Mathematical Soc.
ISBN 13 : 9780821896969
Total Pages : 776 pages
Book Rating : 4.8/5 (969 download)
Download or read book Vortex Dynamics and Vortex Methods written by Christopher Radcliff Anderson and published by American Mathematical Soc.. This book was released on 1991-12-23 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding vortex dynamics is the key to understanding much of fluid dynamics. For this reason, many researchers, using a great variety of different approaches--analytical, computational, and experimental--have studied the dynamics of vorticity. The AMS-SIAM Summer Seminar on Vortex Dynamics and Vortex Methods, held in June 1990 at the University of Washington in Seattle, brought together experts with a broad range of viewpoints and areas of specialization. This volume contains the proceedings from that seminar. The focus here is on the numerical computation of high Reynolds number incompressible flows. Also included is a smaller selection of important experimental results and analytic treatments. Many of the articles contain valuable introductory and survey material as well as open problems. Readers will appreciate this volume for its coverage of a wide variety of numerical, analytical, and experimental tools and for its treatment of interesting important discoveries made with these tools.
Author : Federico Gallizio
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (758 download)
Download or read book Analytical and Numerical Vortex Methods to Model Separated Flows written by Federico Gallizio and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of the separated flows dynamics past obstacles at rest or moving bodies is addressed by means of the study of two topics a) investigation on the existence of some steady solutions of the Euler equations and of the Navier-Stokes equations at large Reynolds number, past bodies characterized by a cusp; b) analysis of the unsteady wake behind a Vertical Axis Turbine (VAT). The survey of such different flow regimes related to the separation phenomenon past bluff bodies or bodies at incidence allowed to devise several numerical and analytical techniques based on the evaluation of the vorticity field.
Author : M.Y. Hussaini
Publisher : Springer Science & Business Media
ISBN 13 : 1461246784
Total Pages : 367 pages
Book Rating : 4.4/5 (612 download)
Download or read book Studies of Vortex Dominated Flows written by M.Y. Hussaini and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the astrophysical scale of a swirling spiral galaxy, through the geophysical scale of a hurricane, down to the subatomic scale of elementary particles, vortical motion and vortex dynamics have played a profound role in our understanding of the physical world. Kuchemann referred to vortex dynamics as "the sinews and muscles of fluid motion. " In order to update our understanding of vortex dominated flows, NASA Langley Research Center and the Institute for Computer Applications in Science and Engineering (ICASE) conducted a workshop during July 9-11, 1985. The subject was broadly divided into five overlapping topics vortex dynamics, vortex breakdown, massive separation, vortex shedding from sharp leading edges and conically separated flows. Some of the experts in each of these areas were invited to provide an overview of the subject. This volume is the proceedings of the workshop and contains the latest, theoretical, numerical, and experimental work in the above-mentioned areas. Leibovich, Widnall, Moore and Sirovich discussed topics on the fundamentals of vortex dynamics, while Keller and Hafez treated the problem of vortex break down phenomena; the contributions of Smith, Davis and LeBalleur were in the area of massive separation and inviscid-viscous interactions, while those of Cheng, Hoeijmakers and Munnan dealt with sharp-leading-edge vortex flows; and Fiddes and Marconi represented the category of conical separated flows.
Author :
Publisher :
ISBN 13 :
Total Pages : 214 pages
Book Rating : 4.:/5 (224 download)
Download or read book Vortex Simulation of Separated Flows in Two and Three Dimensions written by and published by . This book was released on 1990 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is concerned with the applications of vortex methods to the problem of unsteady, separated flows in two and three dimensions and can be divided into three parts. In the first part, an improved method for satisfying the boundary conditions on a flat plate is developed and applied to the two-dimensional separated flow problem. In the second part, an improved three-dimensional vortex particle method is developed. In the third part, the two-dimensional method developed in the first part is modified and extended to three dimensions.
Author : Karl E. Gustafson
Publisher : SIAM
ISBN 13 : 0898712580
Total Pages : 226 pages
Book Rating : 4.8/5 (987 download)
Download or read book Vortex Methods and Vortex Motion written by Karl E. Gustafson and published by SIAM. This book was released on 1991-01-01 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have emerged as a new class of powerful numerical techniques to analyze and compute vortex motion. This book addresses the theoretical, numerical, computational, and physical aspects of vortex methods and vortex motion.
Author : P. R. Spalart
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Simulation of Separated Flows written by P. R. Spalart and published by . This book was released on 1983 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : José Perez Gordo
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)
Download or read book Flow Separation Modelling Through Discrete Vortex Methods written by José Perez Gordo and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the present Master thesis is to develop a flow separation model for airfoils (2D problems) in order to overcome the limitations of classical potential models where flow separation is not allowed. This is done through a meshless methodology called full cloud vortex method. This method computes the solution in several steps. First one, the airfoil is discretized in panels and through classical potential methods, the vorticity over each panel is obtained. After that, the vorticity is concentrated in a single point and shed at a certain distance of the panel. Next step consists on the convection of this vorticity points under the influence of the flow field, the panels and the other vortices. In order to increase the accuracy, the final position is obtained from the computed velocity through a forward 2nd order integration method. In order to cope also viscous effects, a simple method to compute the diffusion of the vorticity of each shed vortex is also implemented. Finally, the pressure coefficient of each panel and the forces acting on the whole airfoil are computed. Once the forces are obtained, a dynamic analysis is carried on. In order to do that, a simple 2 degrees of freedom spring-mass-damper model is implemented. From it, the position, velocity and acceleration of every node of the discretized airfoil is computed. The velocities and accelerations are obtained through a 2nd order finite differences scheme. All the equations are implemented in Fortran, and the final program is introduced in a pre-post processor called GiD, which allows to generate the geometry, discretize it and set all the needed parameters up for for running the simulations. Finally, in order to test the code, three geometries are tested: A cylinder, a symmetric airfoil (NACA0012) and a non symmetric airfoil (NACA4412). The results obtained are compared with experimental results in order to check the correct behaviour of the code. In all the 3 simulated geometries, the results are in good agreement with the experimental ones.
Author : S. M. Belotserkovsky
Publisher : CRC Press
ISBN 13 : 9780849393068
Total Pages : 322 pages
Book Rating : 4.3/5 (93 download)
Download or read book Two-Dimensional Separated Flows written by S. M. Belotserkovsky and published by CRC Press. This book was released on 1992-11-30 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-Dimensional Separated Flows provides a systematic presentation of the theory of separated flow around bodies. The main classes of aerodynamic problems of plane-parallel flow around bodies are described, and the steady aerodynamic, unsteady aerodynamic, and statistical characteristics of a trailing wake are determined. Numerical methods based on the synthesis of models for non-viscous incompressible flow and boundary layer, algorithms, examples, and systematic comparisons are presented. The book also includes numerical results for the problem of separated flow around fixed, oscillating, and rotating cylinders, in addition to results for separated flow around an aerofoil over a wide range of angles. Two-Dimensional Separated Flows will benefit researchers and students studying aerodynamics, aircraft dynamics, aeroelasticity, and the aerodynamics of building structures.
Author : J. Thomas Beale
Publisher : Springer
ISBN 13 : 9789048142637
Total Pages : 387 pages
Book Rating : 4.1/5 (426 download)
Download or read book Vortex Flows and Related Numerical Methods written by J. Thomas Beale and published by Springer. This book was released on 2010-12-09 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many important phenomena in fluid motion are evident in vortex flow, i.e., flows in which vortical structures are significant in determining the whole flow. This book, which consists of lectures given at a NATO ARW held in Grenoble (France) in June 1992, provides an up-to-date account of current research in the study of these phenomena by means of numerical methods and mathematical modelling. Such methods include Eulerian methods (finite difference, spectral and wavelet methods) as well as Lagrangian methods (contour dynamics, vortex methods) and are used to study such topics as 2- or 3-dimensional turbulence, vorticity generation by solid bodies, shear layers and vortex sheets, and vortex reconnection. For researchers and graduate students in computational fluid dynamics, numerical analysis, and applied mathematics.
Author : Jie-Zhi Wu
Publisher : Springer Science & Business Media
ISBN 13 : 3540290281
Total Pages : 776 pages
Book Rating : 4.5/5 (42 download)
Download or read book Vorticity and Vortex Dynamics written by Jie-Zhi Wu and published by Springer Science & Business Media. This book was released on 2007-04-20 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive and intensive monograph for scientists, engineers and applied mathematicians, as well as graduate students in fluid dynamics. It starts with a brief review of fundamentals of fluid dynamics, with an innovative emphasis on the intrinsic orthogonal decomposition of fluid dynamic process, by which one naturally identifies the content and scope of vorticity and vortex dynamics. This is followed by a detailed presentation of vorticity dynamics as the basis of later development. In vortex dynamics part the book deals with the formation, motion, interaction, stability, and breakdown of various vortices. Typical vortex structures are analyzed in laminar, transitional, and turbulent flows, including stratified and rotational fluids. Physical understanding of vertical flow phenomena and mechanisms is the first priority throughout the book. To make the book self-contained, some mathematical background is briefly presented in the main text, but major prerequisites are systematically given in appendices. Material usually not seen in books on vortex dynamics is included, such as geophysical vortex dynamics, aerodynamic vortical flow diagnostics and management.
Author : Athanassios A. Dimas
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book An Adaptive, Fast, Parallel, Vortex Method for Numerical Simulations of Turbulent Separated Flows written by Athanassios A. Dimas and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher Radcliff Anderson
Publisher :
ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.:/5 (29 download)
Download or read book Vortex Methods for Flows of Variable Density written by Christopher Radcliff Anderson and published by . This book was released on 1983 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ernst Heinrich Hirschel
Publisher : Springer Nature
ISBN 13 : 366261328X
Total Pages : 458 pages
Book Rating : 4.6/5 (626 download)
Download or read book Separated and Vortical Flow in Aircraft Wing Aerodynamics written by Ernst Heinrich Hirschel and published by Springer Nature. This book was released on 2020-10-04 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluid mechanical aspects of separated and vortical flow in aircraft wing aerodynamics are treated. The focus is on two wing classes: (1) large aspect-ratio wings and (2) small aspect-ratio delta-type wings. Aerodynamic design issues in general are not dealt with. Discrete numerical simulation methods play a progressively larger role in aircraft design and development. Accordingly, in the introduction to the book the different mathematical models are considered, which underlie the aerodynamic computation methods (panel methods, RANS and scale-resolving methods). Special methods are the Euler methods, which as rather inexpensive methods embrace compressibility effects and also permit to describe lifting-wing flow. The concept of the kinematically active and inactive vorticity content of shear layers gives insight into many flow phenomena, but also, with the second break of symmetry---the first one is due to the Kutta condition---an explanation of lifting-wing flow fields. The prerequisite is an extended definition of separation: “flow-off separation” at sharp trailing edges of class (1) wings and at sharp leading edges of class (2) wings. The vorticity-content concept, with a compatibility condition for flow-off separation at sharp edges, permits to understand the properties of the evolving trailing vortex layer and the resulting pair of trailing vortices of class (1) wings. The concept also shows that Euler methods at sharp delta or strake leading edges of class (2) wings can give reliable results. Three main topics are treated: 1) Basic Principles are considered first: boundary-layer flow, vortex theory, the vorticity content of shear layers, Euler solutions for lifting wings, the Kutta condition in reality and the topology of skin-friction and velocity fields. 2) Unit Problems treat isolated flow phenomena of the two wing classes. Capabilities of panel and Euler methods are investigated. One Unit Problem is the flow past the wing of the NASA Common Research Model. Other Unit Problems concern the lee-side vortex system appearing at the Vortex-Flow Experiment 1 and 2 sharp- and blunt-edged delta configurations, at a delta wing with partly round leading edges, and also at the Blunt Delta Wing at hypersonic speed. 3) Selected Flow Problems of the two wing classes. In short sections practical design problems are discussed. The treatment of flow past fuselages, although desirable, was not possible in the frame of this book.
