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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 The Relation of Turbulence to Diffusion in Open-channel Flows by : Thomas N. Keefer
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Book Synopsis Theoretical and Applied Mechanics Report by :
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Book Synopsis Studying Turbulence Using Numerical Simulation Databases. 4: Proceedings of the 1992 Summer Program by :
Download or read book Studying Turbulence Using Numerical Simulation Databases. 4: Proceedings of the 1992 Summer Program written by and published by . This book was released on 1992 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studying Turbulence Using Numerical Simulation Databases IV by : Center for Turbulence Research (U.S.)
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Download or read book China written by World Bank and published by World Bank Publications. This book was released on 1993 with total page 1422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Republic of Korea's industrial policy has directed that nation's economy through nearly three decades of spectacular growth. But the authors of this paper maintain that this policy is showing signs of being outmoded. The time has come, the authors argue, for the Korean government to stop managing the economy's structural development and to redefine the responsibilities of business and government. Under this proposed compact, the allocation of resources would shift from the government to the private industrial and financial sectors. The transformation of the government bureaucracy from an ad hoc policy role to one of a transparent and predictable regulator is a key to the success of this undertaking. These new directions would present the government with enormous challenges. Greater competitive discipline and regulatory oversight would be required. While dealing with the complexities of the transition, the government would have to maintain macroeconomic stability and the momentum of savings and investment. For comparison, the study examines the industrial economies of France, Germany, Japan, and the United States, which underwent similar shifts.
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Book Synopsis The Origin of Turbulence in Near-Wall Flows by : A.V. Boiko
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Book Synopsis Analysis of Multipoint-multitime Correlations and Diffusion in Decaying Homogeneous Turbulence by : Robert G. Deissler
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Book Synopsis Space and Time Correlations in a Turbulent Fluid by : Jean Bass
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Book Synopsis Turbulence in Open Channel Flows by : Hiroji Nakagawa
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Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
