Abstract
Direct numerical simulation (DNS) of a turbulent boundary layer has been carried out to examine the effect of the large-scale structures (LSSs) upon the near-wall turbulence. It is found by comparison with the DNS data of the Poiseuille and the Couette flows that the spanwise scales of LSSs are different among the canonical wall turbulences when normalized with the channel half width or the boundary layer thickness, and that the effect of LSSs on the near-wall turbulence depends upon the spanwise scales. We introduce a Reynolds number based on the spanwise scales, and suggest that the new Reynolds number dependence of the nearwall turbulence can be analyzed irrespective of the flow configurations at least at low-to-moderate Reynolds numbers.
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© 2008 Springer
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Iwamoto, K., Tsukahara, T., Nakano, H., Kawamura, H. (2008). Effect of Large-Scale Structures upon Near-Wall Turbulence. In: Kaneda, Y. (eds) IUTAM Symposium on Computational Physics and New Perspectives in Turbulence. IUTAM Bookseries, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6472-2_8
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DOI: https://doi.org/10.1007/978-1-4020-6472-2_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6471-5
Online ISBN: 978-1-4020-6472-2
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