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Author : R. A. Hartunian
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (17 download)
Download or read book On the Separation of the Unsteady Laminar Boundary Layer written by R. A. Hartunian and published by . This book was released on with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Laura Lynn Pauley
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.F/5 ( download)
Download or read book A Numerical Study of Unsteady Laminar Boundary Layer Separation written by Laura Lynn Pauley and published by . This book was released on 1988 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unsteady, incompressible Navier-Stokes equations were solved using a fractional timestep method. Using this technique, the separation of a laminar boundary layer under the influence of an external adverse pressure gradient was.
Author : Tzuyin Wu
Publisher :
ISBN 13 :
Total Pages : 504 pages
Book Rating : 4.E/5 ( download)
Download or read book Numerical Studies of Unsteady Laminar Boundary-layer Separation Over Impulsively-started Moving Objects written by Tzuyin Wu and published by . This book was released on 1991 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Union of Theoretical and Applied Mechanics
Publisher :
ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.:/5 (89 download)
Download or read book Boundary Layer Research written by International Union of Theoretical and Applied Mechanics and published by . This book was released on 1958 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul K. Chang
Publisher : Elsevier
ISBN 13 : 1483181286
Total Pages : 800 pages
Book Rating : 4.4/5 (831 download)
Download or read book Separation of Flow written by Paul K. Chang and published by Elsevier. This book was released on 2014-06-28 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interdisciplinary and Advanced Topics in Science and Engineering, Volume 3: Separation of Flow presents the problem of the separation of fluid flow. This book provides information covering the fields of basic physical processes, analyses, and experiments concerning flow separation. Organized into 12 chapters, this volume begins with an overview of the flow separation on the body surface as discusses in various classical examples. This text then examines the analytical and experimental results of the laminar boundary layer of steady, two-dimensional flows in the subsonic speed range. Other chapters consider the study of flow separation on the two-dimensional body, flow separation on three-dimensional body shape and particularly on bodies of revolution. This book discusses as well the analytical solutions of the unsteady flow separation. The final chapter deals with the purpose of separation flow control to raise efficiency or to enhance the performance of vehicles and fluid machineries involving various engineering applications. This book is a valuable resource for engineers.
Author : Birgit Ursula Jurgens
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (48 download)
Download or read book Unsteady Laminar Separation written by Birgit Ursula Jurgens and published by . This book was released on 1992 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Leon L. Van Dommelen
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.F/5 ( download)
Download or read book On the Lagrangian Description of Unsteady Boundary Layer Separation written by Leon L. Van Dommelen and published by . This book was released on 1989 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : T. Cebeci
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (227 download)
Download or read book Some Important Problem in Unsteady Boundary Layers Including Separation. I. Nature of Singularity on Oscillating Airfoils written by T. Cebeci and published by . This book was released on 1984 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary results are presented for the analysis of unsteady laminar boundary layers on oscillating airfoils. An examination of the evolution of the boundary layer near the nose of an oscillating airfoil has revealed that, when the reduced frequency is of the same order as in experiments on dynamic stall, the unsteady boundary layer ceases to behave in a smooth manner just downstream of separation and before one cycle is completed. As for the case of the implusively started circular cylinder, the irregular behavior signals the onset of a singularity in the solution of the boundary layer equations. Numerical results for the method are compared with the numerical results of van Dommelen and Shen for the impulsively started circular cylinder, the irregular behavior signals the onset of a singularity in the solution of the boundary layer equations. Numerical results for the method are compared with the numerical results of van Dommelen and Shen for the impulsively started circular cylinder.
Author : Walter E. Gibson
Publisher :
ISBN 13 :
Total Pages : 558 pages
Book Rating : 4.3/5 (91 download)
Download or read book Unsteady Laminar Boundary Layers written by Walter E. Gibson and published by . This book was released on 1962 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722455040
Total Pages : 50 pages
Book Rating : 4.4/5 (55 download)
Download or read book On the Lagrangian Description of Unsteady Boundary Layer Separation. Part 1 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-09 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although unsteady, high-Reynolds number, laminar boundary layers have conventionally been studied in terms of Eulerian coordinates, a Lagrangian approach may have significant analytical and computational advantages. In Lagrangian coordinates the classical boundary layer equations decouple into a momentum equation for the motion parallel to the boundary, and a hyperbolic continuity equation (essentially a conserved Jacobian) for the motion normal to the boundary. The momentum equations, plus the energy equation if the flow is compressible, can be solved independently of the continuity equation. Unsteady separation occurs when the continuity equation becomes singular as a result of touching characteristics, the condition for which can be expressed in terms of the solution of the momentum equations. The solutions to the momentum and energy equations remain regular. Asymptotic structures for a number of unsteady 3-D separating flows follow and depend on the symmetry properties of the flow. In the absence of any symmetry, the singularity structure just prior to separation is found to be quasi 2-D with a displacement thickness in the form of a crescent shaped ridge. Physically the singularities can be understood in terms of the behavior of a fluid element inside the boundary layer which contracts in a direction parallel to the boundary and expands normal to it, thus forcing the fluid above it to be ejected from the boundary layer. Vandommelen, Leon L. and Cowley, Stephen J. Glenn Research Center NASA-SAA-C-99066-G; RTOP 505-62-21...
Author : James Edward Carter
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (317 download)
Download or read book Inverse Solutions for Laminar Boundary-layer Flows with Separation and Reattachment written by James Edward Carter and published by . This book was released on 1975 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical solutions of the laminar, incompressible boundary-layer equations are presented for flows involving separation and reattachment. Regular solutions are obtained with an inverse approach in which either the displacement thickness or the skin friction is specified; the pressure is deduced from the solution. A vorticity--stream-function formulation of the boundary-layer equations is used to eliminate the unknown pressure. Solutions of the resulting finite-difference equations, in which the flow direction is taken into account, are obtained by several global iteration schemes which are stable and have unconditional diagonal dominance. Results are compared with Klineberg and Steger's separated boundary-layer calculations, and with Briley's solution of the Navier-Stokes equations for a separated region. In addition, an approximate technique is presented in which the streamwise convection of vorticity is set equal to zero in the reversed flow region; such a technique results in a quick forward-marching procedure for separated flows.
Author :
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (317 download)
Download or read book Unsteady Laminar Boundary-layer Calculations on Oscillating Configurations Including Backflow. Part 2: Airfoil in High-amplitude Pitching Motion. Dynamic Stall written by and published by . This book was released on 1983 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Th Tsahalis
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (227 download)
Download or read book Oscillating Laminar Boundary Layers and Unsteady Separation written by D. Th Tsahalis and published by . This book was released on 1974 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unsteady laminar boundary equations are solved numerically for oscillating outer flow velocity distributions. Some characteristic features of oscillating boundary-layers are observed and checked against existing analytical and experimental data. The response of the point of zero skin friction that marks flow reversal on the wall, to various outer flow oscillatory distributions is studied. (Modified author abstract).
Author : K. C. Wang
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (227 download)
Download or read book Unsteady Laminar Flow written by K. C. Wang and published by . This book was released on 1980 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was aimed at developing the methodology for computing unsteady laminar boundary layers with flow reversal and establishing a new unsteady separation criterion. The calculation of two-dimensional, unsteady boundary layers based strictly on the analogy with the steady, three-dimensional problems has been completed. The results demonstrated the validity of the proposed unsteady separation criterion. As a prelude to understanding the full, three-dimensional, unsteady problem, this report also treated an unsteady symmetry-plane boundary layer. Initial test calculations were successful, but the bulk of the computation remains to be carried out.
Author : R. C. Ackerberg
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (227 download)
Download or read book Research on Boundary-Layer Separation written by R. C. Ackerberg and published by . This book was released on 1974 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of the laminar boundary-layer flow and separation from a wall just upstream of a sharp trailing edge at which a free streamline is attached is discussed and summarized. A new method for integrating the unsteady laminar boundary-layer equations when there are regions of backflow is described. A complete set of references to this work is included. (Author).
Author : R. A. W. M. Henkes
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (644 download)
Download or read book Computation of the Separation of Steady and Unsteady, Incompressible, Laminar Boundary Layers written by R. A. W. M. Henkes and published by . This book was released on 1985 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ian John Sobey
Publisher : OUP Oxford
ISBN 13 : 9780198506751
Total Pages : 350 pages
Book Rating : 4.5/5 (67 download)
Download or read book Introduction to Interactive Boundary Layer Theory written by Ian John Sobey and published by OUP Oxford. This book was released on 2000 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major achievements in fluid mechanics in the last quarter of the twentieth century has been the development of an asymptotic description of perturbations to boundary layers known generally as 'triple deck theory'. These developments have had a major impact on our understanding of laminar fluid flow, particularly laminar separation. It is also true that the theory rests on three quarters of a century of development of boundary layer theory which involves analysis, experimentation and computation. All these parts go together, and to understand the triple deck it is necessary to understand which problems the triple deck resolves and which computational techniques have been applied. This book presents a unified account of the development of laminar boundary layer theory as a historical study together with a description of the application of the ideas of triple deck theory to flow past a plate, to separation from a cylinder and to flow in channels. The book is intended to provide a graduate level teaching resource as well as a mathematically oriented account for a general reader in applied mathematics, engineering, physics or scientific computation.
