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Author : Fotis Sotiropoulos
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (31 download)
Download or read book Flow in Curved Ducts of Varying Cross-section written by Fotis Sotiropoulos and published by . This book was released on 1992 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anne M. Robertson
Publisher :
ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.:/5 (33 download)
Download or read book On Viscous Flow in Curved Pipes of Variable Cross-section written by Anne M. Robertson and published by . This book was released on 1992 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Flow and Heat Transfer in Strongly Curved Ducts of Rectangular Cross-section written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study of heat transfer in 90°, constant cross-section curved duct, steady, laminar flow is presented. The work is aimed primarily at characterizing the effects of duct geometry on heat transfer by considering, especially, the role of secondary motions during the developing period of the flow. However, due consideration has also been given to varying initial conditions of velocity and temperature at the entrance section to the duct. In addition, an assessment is made of the relative contributions of individual duct walls to heat transfer in the flow. It is found that, in general, heat transfer increases with Dean number with the largest transfer rates occurring through the duct side walls and outer-curvature wall. Duct geometries with aspect ratio greater or smaller than unity have weaker secondary motions and are less effective for heat transfer. Similarly, plug-flow entrance profiles for velocity retard the development of cross-section flow thus inhibiting a significant contribution to heat transfer. It is concluded that short ducts with strong curvature and intense secondary motions can be as effective for heat transfer as longer ducts which are less strongly curved. Calcuations are based on fully elliptic (in space) forms of the transport equation governing the flow. They are of engineering value and are limited in accuracy only by the degree of computational mesh refinement. A comparison with calculations based on parabolic equations has been made and it is shown how the latter can lead to erroneous results for strongly curved flows.
Author : C. J. Rowland
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (634 download)
Download or read book Flow through curved ducts of constant cross section, S curve written by C. J. Rowland and published by . This book was released on 1964 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722431310
Total Pages : 28 pages
Book Rating : 4.4/5 (313 download)
Download or read book Numerical Study of Turbulent Secondary Flows in Curved Ducts 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 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pressure driven, fully-developed turbulent flow of an incompressible viscous fluid in curved ducts of square cross-section is studied numerically by making use of a finite volume method. A nonlinear Kappa - Iota model is used to represent the turbulence. The results for both straight and curved ducts are presented. For the case of fully-developed turbulent flow in straight ducts, the secondary flow is characterized by an eight-vortex structure for which the computed flowfield is shown to be in good agreement with available experimental data. The introduction of moderate curvature is shown to cause a substantial increase in the strength of the secondary flow and to change the secondary flow pattern to either a double-vortex or a four-vortex configuration. Hur, N. and Thangam, S. and Speziale, C. G. Unspecified Center NAS1-18605; RTOP 505-90-21-01...
Author : Katie Dolores Clifton
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (254 download)
Download or read book A Finite-element Analysis of Flow in Rotating Curved Ducts of Rectangular Cross-section written by Katie Dolores Clifton and published by . This book was released on 1991 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bo Gervang
Publisher :
ISBN 13 :
Total Pages : 212 pages
Book Rating : 4.:/5 (472 download)
Download or read book Numerical Simulation of 3-dimensional Flow in Straight and Curved Ducts of Rectangular Cross Section written by Bo Gervang and published by . This book was released on 1989 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Philip Adriaan Jacob Mees
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (462 download)
Download or read book Instability and Transitions of Flow in a Curved Duct of Square Cross Section written by Philip Adriaan Jacob Mees and published by . This book was released on 1994 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. P. Kreskovsky
Publisher :
ISBN 13 :
Total Pages : 64 pages
Book Rating : 4.:/5 (317 download)
Download or read book Prediction of Laminar and Turbulent Primary and Secondary Flows in Strongly Curved Ducts written by J. P. Kreskovsky and published by . This book was released on 1981 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michel Philippe Arnal
Publisher :
ISBN 13 :
Total Pages : 696 pages
Book Rating : 4.:/5 (7 download)
Download or read book Investigation of Developing Laminar and Turbulent Flow in Curved Ducts written by Michel Philippe Arnal and published by . This book was released on 1988 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Anthony McAndrew
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.:/5 (853 download)
Download or read book Experimental Investigation of Three-dimensional Flow in a Curved Rectangular Cross Section Duct written by John Anthony McAndrew and published by . This book was released on 1982 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph A. Humphrey
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (227 download)
Download or read book Developing Turbulent Flow in Strongly Curved Passages of Square and Circular Cross-Section written by Joseph A. Humphrey and published by . This book was released on 1984 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary is provided of the achievements and recommendations related to this research program. Reference is made to the extensive documentation already published. The appendix to this report contains recent experimental results obtained in a 180 deg curved pipe of circular cross-section. The results differ significantly from corresponding measurements in curved ducts.
Author : Kurabalakota Sathyanarayana
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (574 download)
Download or read book Three-dimensional Viscous Flow written by Kurabalakota Sathyanarayana and published by . This book was released on 1978 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Suhas V. Patankar
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (227 download)
Download or read book Computation of Three-Dimensional Flows in Ducts of Varying Cross Sections written by Suhas V. Patankar and published by . This book was released on 1983 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A calculation procedure is developed for the three-dimensional flow in ducts of varying cross section. The procedure is of the fully parabolic variety; i.e., the solution for the whole duct is obtained by a marching scheme that proceeds from the upstream end to the downstream region solving the flow over one cross section at each marching step. The procedure for each cross section is based on the finite element method of Baliga and Patankar. The report describes a major improvement incorporated in the method and some examples of the use of the method. The adaptation of the method for a marching procedure for duct flows is also described. Among the examples presented as test problems are the developing flows: in a square duct, over a rod bundle, in a square diffuser, and in an elliptic duct of varying cross-sectional shape. All numerical solutions are shown to be in satisfactory agreement with exact solutions and/or other available solutions and experimental data. (Author).
Author : Vladimir Britanak
Publisher : Elsevier
ISBN 13 : 0080464645
Total Pages : 364 pages
Book Rating : 4.0/5 (84 download)
Download or read book Discrete Cosine and Sine Transforms written by Vladimir Britanak and published by Elsevier. This book was released on 2010-07-28 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Discrete Cosine Transform (DCT) is used in many applications by the scientific, engineering and research communities and in data compression in particular. Fast algorithms and applications of the DCT Type II (DCT-II) have become the heart of many established international image/video coding standards. Since then other forms of the DCT and Discrete Sine Transform (DST) have been investigated in detail. This new edition presents the complete set of DCT and DST discrete trigonometric transforms, including their definitions, general mathematical properties, and relations to the optimal Karhunen-Loéve transform (KLT), with the emphasis on fast algorithms (one-dimensional and two-dimensional) and integer approximations of DCTs and DSTs for their efficient implementations in the integer domain. DCTs and DSTs are real-valued transforms that map integer-valued signals to floating-point coefficients. To eliminate the floating-point operations, various methods of integer approximations have been proposed to construct and flexibly generate a family of integer DCT and DST transforms with arbitrary accuracy and performance. The integer DCTs/DSTs with low-cost and low-powered implementation can replace the corresponding real-valued transforms in wireless and satellite communication systems as well as portable computing applications. The book is essentially a detailed excursion on orthogonal/orthonormal DCT and DST matrices, their matrix factorizations and integer aproximations. It is hoped that the book will serve as a valuable reference for industry, academia and research institutes in developing integer DCTs and DSTs as well as an inspiration source for further advanced research. Presentation of the complete set of DCTs and DSTs in context of entire class of discrete unitary sinusoidal transforms: the origin, definitions, general mathematical properties, mutual relationships and relations to the optimal Karhunen-Loéve transform (KLT) Unified treatment with the fast implementations of DCTs and DSTs: the fast rotation-based algorithms derived in the form of recursive sparse matrix factorizations of a transform matrix including one- and two-dimensional cases Detailed presentation of various methods and design approaches to integer approximation of DCTs and DSTs utilizing the basic concepts of linear algebra, matrix theory and matrix computations leading to their efficient multiplierless real-time implementations, or in general reversible integer-to-integer implementations Comprehensive list of additional references reflecting recent/latest developments in the efficient implementations of DCTs and DSTs mainly one-, two-, three- and multi-dimensional fast DCT/DST algorithms including the recent active research topics for the time period from 1990 up to now
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Author : Kurichi Ramaswamy Kumar
Publisher : National Library of Canada
ISBN 13 : 9780315320000
Total Pages : 320 pages
Book Rating : 4.3/5 (2 download)
Download or read book Numerical Study of Flow Through Curved Ducts of Varying Area [microform] written by Kurichi Ramaswamy Kumar and published by National Library of Canada. This book was released on 1986 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Institute for Computer Applications in Science and Engineering
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Study of Turbulent Secondary Flows in Curved Ducts written by Institute for Computer Applications in Science and Engineering and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
