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Roughness Scaling Parameters in the Fully-Rough Regime

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IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls

Part of the book series: IUTAM Bookseries ((IUTAMBOOK,volume 22))

Abstract

A correlation is proposed to estimate the frictional drag for a surface covered with irregular three-dimensional roughness in the fully rough regime. The correlation relies solely on a measurement of the surface roughness profile and builds on previous work utilizing moments of the surface statistics. A relationship is given for the equivalent sandgrain roughness height (k s ) as a function of the root-mean-square roughness height (k rms ) and the skewness of the roughness probability density function (sk). Boundary layer similarity scaling then allows the overall frictional drag coefficient to be determined as a function of the ratio of the equivalent sandgrain roughness height to length of the surface.

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Author information

Authors and Affiliations

  1. U.S. Naval Academy, Annapolis, MD, USA

    Karen Flack & Michael P. Schultz

Authors
  1. Karen Flack
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  2. Michael P. Schultz
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Corresponding author

Correspondence to Karen Flack .

Editor information

Editors and Affiliations

  1. Dept. Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom

    T. B. Nickels

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Flack, K., Schultz, M.P. (2010). Roughness Scaling Parameters in the Fully-Rough Regime. In: Nickels, T. (eds) IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls. IUTAM Bookseries, vol 22. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9631-9_14

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  • DOI: https://doi.org/10.1007/978-90-481-9631-9_14

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-9630-2

  • Online ISBN: 978-90-481-9631-9

  • eBook Packages: EngineeringEngineering (R0)

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