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Propagation Velocity And Space Time Correlation Of Perturbations In Turbulent Channel Flow
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722703578 Total Pages :52 pages Book Rating :4.7/5 (35 download)
Book Synopsis Propagation Velocity and Space-Time Correlation of Perturbations in Turbulent Channel Flow by : National Aeronautics and Space Administration (NASA)
Download or read book Propagation Velocity and Space-Time Correlation of Perturbations in Turbulent Channel Flow written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-10 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A database obtained from direct numerical simulation of a turbulent channel flow is analyzed to extract the propagation velocity V of velocity, vorticity, and pressure fluctuations from their space-time correlations. A surprising result is that V is approximately the same as the local mean velocity for most of the channel, except for the near-wall region. For y(+) is less than or equal to 15, V is virtually constant, implying that perturbations of all flow variables propagate like waves near the wall. In this region V is 55 percent of the centerline velocity U(sub c) for velocity and vorticity perturbations and 75 percent of U(sub c) for pressure perturbations. Scale-dependence of V is also examined by analyzing the bandpass filtered flow fields. Comprehensive documentation of the propagation velocities and space-time correlation data, which should prove useful in the evaluation of Taylor's hypothesis is presented. An attempt was made to explain some of the data in terms of our current understanding of organized structures, although not all of the data can be explained this way. Kim, John and Hussain, Fazle Ames Research Center...
Book Synopsis Propagation Velocity and Space-time Correlation of Perturbations in Turbulent Channel Flow by :
Download or read book Propagation Velocity and Space-time Correlation of Perturbations in Turbulent Channel Flow written by and published by . This book was released on 1992 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1995 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Representation of Space-time Velocity and Pressure Fluctuation Correlations by a Tentative Phenomenological Model by : Richard T. Lahey
Download or read book Representation of Space-time Velocity and Pressure Fluctuation Correlations by a Tentative Phenomenological Model written by Richard T. Lahey and published by . This book was released on 1968 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
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Book Synopsis Theoretical and Applied Mechanics Report by :
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Book Synopsis Studying Turbulence Using Numerical Simulation Databases IV by : Center for Turbulence Research (U.S.)
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Book Synopsis Wall-pressure Fluctuations and Pressure-velocity Correlations in a Turbulent Boundary Layer by : John S. Serafini
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Book Synopsis Analysis of Propagation in Space-time Modulated Media Using Many-space Scale Perturbation Theory by : Ronald Louis Fante
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Book Synopsis The Structure of the Vorticity Field in Turbulent Channel Flow. Part 1: Analysis of Instantaneous Fields and Statistical Correlations by :
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Book Synopsis International Aerospace Abstracts by :
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Book Synopsis Power- and Cross-spectra and Space-time Correlations of Surface Fluctuating Pressures at Mach Numbers Between 1.6 and 2.5 by : Wei J. Chyu
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