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LES Study on the Very Large-Scale Structures of Wall-Bounded Turbulence and an Effect of Thermal Stratification

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Statistical Theories and Computational Approaches to Turbulence

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Abstract

The objective of this work is to investigate the very large-scale flow structures observed in or above the logarithmic layer of a wall-bounded turbulence and the effect of thermal stratification on these structures. Large Eddy Simulation (LES) is adopted as a numerical method in this work. We have found that the large-scale structures are similar to the streak-like structures observed in the vicinity of the wall but their size is hundreds times larger than the fine-scale structures. The large structures are also strongly affected by the thermal stratification and suppressed at a certain weakly stable stratification (bulk Ri of about 0.1) tested here, contrarily to the fine-scale streak structures being rather insensitive to the thermal stratification.

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Author information

Authors and Affiliations

  1. Tokyo Institute of Technology, Nagatsuta, Midoriku, Yokohamashi, 226-8502, Japan

    Makoto Tsubokura & Tetsuro Tamura

Authors
  1. Makoto Tsubokura
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  2. Tetsuro Tamura
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Editors and Affiliations

  1. Department of Computational Science and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, 464-8603, Chikusa-ku, Nagoya, Japan

    Yukio Kaneda (Professor) (Professor)

  2. Department of System Engineering, Nagoya Institute of Technology, Gokiso, 466-8555, Showa-ku, Nagoya, Japan

    Toshiyuki Gotoh (Professor) (Professor)

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© 2003 Springer Japan

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Tsubokura, M., Tamura, T. (2003). LES Study on the Very Large-Scale Structures of Wall-Bounded Turbulence and an Effect of Thermal Stratification. In: Kaneda, Y., Gotoh, T. (eds) Statistical Theories and Computational Approaches to Turbulence. Springer, Tokyo. https://doi.org/10.1007/978-4-431-67002-5_10

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  • DOI: https://doi.org/10.1007/978-4-431-67002-5_10

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-67004-9

  • Online ISBN: 978-4-431-67002-5

  • eBook Packages: Springer Book Archive

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