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Les Investigation Of Coherent Structures In Boundary Layers And Wakes Volume Ii Wake Around Square Cylinder
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Book Synopsis Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume II: Wake Around Square Cylinder by :
Download or read book Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume II: Wake Around Square Cylinder written by and published by . This book was released on 2002 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose of the present investigation is to assess the feasibility of simulating and studying coherent structures in turbulent shear layers, malting use of Large Eddy Simulations (LES). Volume I of present report has described the general background, the main development and the results obtained for wall bounded turbulent flow, particularly the turbulent charnel flow at equilibrium. The present Volume II is devoted to the study of the flow around an obstacle, in particular a cylinder with square cross section and infinlte length in span- wise direction. This test case belongs to a completely different class of flow respect the one analyzed in Volume I, and it is a rather severe test case for the LES code. Most of the advanced features of the code were exploited, and different simulations were performed, to collect, whenever possible, sufficient data to draw conclusions and remarks. Differently from the case of channel flow, were the code has been extensively validated and analyzed in detail, down to the level of turbulent kinetic energy budget, the present flow constitutes a still active area of basic research. The higher complexity of the flow, the absence of a second direction of homogeneity, beside the span-wise direction, the existence of a dominant frequency in the flow, the necessity of employing upwinding discretization for advection terms and other numerical difficulties have led to such complexities of execution that only the very basic set of statistics (statistical moments of first and second order) were obtained. At the same time, limits and draw-backs for current LES code implementation have been outlined. Most of the efforts were devoted to reach a sufficient similarity in behavior between LES simulation and reference experimental data; this attempt has led to build grids not perfectly suited to analyze structures applying the criteria based on the gradient of velocity tensor introduced in Volume L.
Book Synopsis Ordinantie vande Ertzhertoghen onse Souvereyne Princen oyt feyt vande munte by :
Download or read book Ordinantie vande Ertzhertoghen onse Souvereyne Princen oyt feyt vande munte written by and published by . This book was released on 1619 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume I: Investigation of Coherent Structure in an Attached Shear Layer by :
Download or read book Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume I: Investigation of Coherent Structure in an Attached Shear Layer written by and published by . This book was released on 2002 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Purpose of the present investigation was to assess the feasibility of simulating and studying coherent structures in turbulent shear layers, making use of Large Eddy Simulations (LES). The current investigation has been performed across a rather wide range of simulated flows and LES implementations, starting from an established and validated structured LES code based on finite differences and cartesian grids ending to an unstructured LES code under development. The use of the unstructured approach was considered necessary whenever complex geometries have to be analyzed, which cannot be handled by the structured code, regardless its advanced features (like multi-domain approach). The unstructured LES code was developed in the frame of current GRANT, and it has undergone validation. The structured LES code, which had already validated over a wide range of flow configurations, was used to analyze the wake behind an obstacle, attempt which was not made before. Extensive studies were needed in the attempt to validate to code for this case. Given the wide scope of present report and the mass of data available from different LES codes, flows and structures, the work has been spit between two work groups, the one devoted to the structured LES and the one devoted to the unstructured LES. In this flame it was found more practical to sub-divide the full report in three volumes: Volume I-- Investigation of Coherent Structures in an Attached Shear Layer; Volume II --Wake around square Cylinder; Volume III -- Unstructured LES.
Book Synopsis Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume III: Development of a Parallel Unstructured Grid Les Code by :
Download or read book Les Investigation of Coherent Structures in Boundary Layers and Wakes. Volume III: Development of a Parallel Unstructured Grid Les Code written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the present investigation is to assess the feasibility of simulating and studying coherent structures in turbulent shear layers, making use of Large Eddy Simulations (LES). Volumes I and II were devoted to the investigation of coherent structures in LES solutions obtained using a structured-grid finite-difference code, first in an attached turbulent flow, and then in the wake behind a square cylinder. The structured grid code used in Parts I & II, despite its multi-domain capability, is limited in the domain geometries it can handle. The third part of the work was therefore devoted to the development of an unstructured grid LES code able to compute turbulent flows over arbitrary two-dimensional geometries. A combined finite-element/Fourier spectral space discretization scheme was selected, as it combines optimally the geometrical flexibility provided by the finite element scheme and the computational efficiency resulting from the decomposition in Fourier modes in the outof-plane direction. Indeed, thanks to this decomposition, and a suitable treatment of the nonlinear convective terms, the 3D flow problem is transformed into a series of 2D problems in Fourier space, completely decoupled within each time step. In addition, the decoupling allows for an easy parallelization by partitioning the work in Fourier space rather than physical space. Also, the stabilized finite element technique selected for the in-plane discretization provides an accuracy superior to its finite volume counterpart on the same unstructured grid and for the same discretization stencil.
Book Synopsis LES Investigation of Coherent Structures in Boundary Layers and Wakes. Volume IV: Summary of Work Accomplished and Final Conclusions by :
Download or read book LES Investigation of Coherent Structures in Boundary Layers and Wakes. Volume IV: Summary of Work Accomplished and Final Conclusions written by and published by . This book was released on 2002 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Present text summarizes the work performed during the present investigation to assess the feasibility to simulate and study coherent structures in turbulent shear layers making use of Large Eddy Simulations (LES), and whose results are detailed in the three companion volumes R. Giammanco and C. Benocci (2003a), R. Giammanco and C Benocci (2003b) and G. Degrez and D. Snyder (2003), which complete the present report.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1987 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of coherent structures in turbulent boundary layers by : Candace Elaine Wark
Download or read book Experimental Investigation of coherent structures in turbulent boundary layers written by Candace Elaine Wark and published by . This book was released on 1989 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Larger Scale Coherent Structures in Fully Developed Turbulent Boundary Layers by : Nick Hutchins
Download or read book An Investigation of Larger Scale Coherent Structures in Fully Developed Turbulent Boundary Layers written by Nick Hutchins and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch Publisher : ISBN 13 : Total Pages :1080 pages Book Rating :4.E/5 ( download)
Book Synopsis Japanese Science and Technology, 1983-1984 by : United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
Download or read book Japanese Science and Technology, 1983-1984 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch and published by . This book was released on 1985 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical & Experimental Investigation of Coherent Structure in the Turbulent Boundary Layer by : C. R. Smith
Download or read book Theoretical & Experimental Investigation of Coherent Structure in the Turbulent Boundary Layer written by C. R. Smith and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This program combines both experimental flow visualization studies with analytical investigations of a series of phenomenological and theoretical models based upon three-dimensional, vortical flow structures developing and interacting in proximity to a solid surface. The experimental program considered a range of sub-problems including the effect of surface modifications on low-speed streak formation and drag, and the effect of vortex loop inter-action with a solid boundary. To augment visual studies, a computerized interface with the video system has been developed which allows quantitative data to be obtained from flow visualization pictures. The specific thrust of the theoretical studies has been focussed on three areas: (1) how two and three-dimensional vortex structures interact with wall boundary layers; (2) the development of a new type of prediction method for two-dimensional turbulent boundary-layer flows; and (3) improvement in numerical techniques for solving parabolic, boundary-layer equations.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coherent Structures in Numerical and Experimental Turbulent Boundary Layers by : A.D. Schwarz-van Manen
Download or read book Coherent Structures in Numerical and Experimental Turbulent Boundary Layers written by A.D. Schwarz-van Manen and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental investigation of the boundary layer on a rotating cylinder by : Jeffrey B. Morton
Download or read book Experimental investigation of the boundary layer on a rotating cylinder written by Jeffrey B. Morton and published by . This book was released on 1974 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of the Boundary Layer Structures in a Partially-filled Horizontal and Rapidly-rotating Cylinder by : Timothy Joseph Singler
Download or read book An Experimental Investigation of the Boundary Layer Structures in a Partially-filled Horizontal and Rapidly-rotating Cylinder written by Timothy Joseph Singler and published by . This book was released on 1982 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Image Velocimetry by : Markus Raffel
Download or read book Particle Image Velocimetry written by Markus Raffel and published by Springer Science & Business Media. This book was released on 2007-08-09 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This immensely practical guide to PIV provides a condensed, yet exhaustive guide to most of the information needed for experiments employing the technique. This second edition has updated chapters on the principles and extra information on microscopic, high-speed and three component measurements as well as a description of advanced evaluation techniques. What’s more, the huge increase in the range of possible applications has been taken into account as the chapter describing these applications of the PIV technique has been expanded.
Book Synopsis An Experimental Study of Coherent Structures in Turbulent Boundary Layers by : You-Ming Yuan
Download or read book An Experimental Study of Coherent Structures in Turbulent Boundary Layers written by You-Ming Yuan and published by . This book was released on 1991 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
