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Scaling in Wall Turbulence: Scale Separation and Interaction (Invited Paper)

McKeon, B. J. (2008) Scaling in Wall Turbulence: Scale Separation and Interaction (Invited Paper). In: 5th AIAA Theoretical Fluid Mechanics Conference, 23–26 June 2008, Seattle, WA.

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High Reynolds number pipe flow data are used to demonstrate the importance of several conditions related to scale separation that are either assumed in the classical theories or may be used in light of recent results in wall turbulence to infer a minimum Reynolds number condition above which scaling results may be suitable for extrapolation. Results from the Princeton Superpipe have suggested Re_τ > 5000 as the minimum Reynolds number for which key properties of pipe flow reach a “fully-developed” condition, based on observations of streamwise mean and turbulent velocity structure. Additional values related to finer constraints on the structural development are also discussed. A “skeleton” of wall turbulence is introduced, based on structural components identified as having a dominant role in the dynamics of near-wall turbulence in recent experiments by a variety of authors. Possible interaction mechanisms between these components are described alongside some outstanding questions concerning scale separation and interaction.

Item Type:Conference or Workshop Item (Paper)
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McKeon, B. J.0000-0003-4220-1583
Additional Information:©2008 AIAA. The support of the Office of Naval Research (Ron Joslin, Program Manager), for continuing investigation into scaling and scale interaction high Reynolds number flow is gratefully acknowledged. The author would like to thank Lex Smits and Jonathan Morrison for continuing use of data from the Princeton/ONR Superpipe and insightful conversations. It is a pleasure to acknowledge useful discussion with Michele Guala.
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Office of Naval Research (ONR)UNSPECIFIED
Record Number:CaltechAUTHORS:20141107-121005176
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51443
Deposited By: Jamie Sei
Deposited On:07 Nov 2014 23:05
Last Modified:10 Nov 2021 19:10

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