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  1. B200 工学部/工学研究科
  2. B200a 雑誌掲載論文
  3. 学術雑誌

Turbulent characteristics and energy transfer in the far field of active-grid turbulence

http://hdl.handle.net/2237/0002002164
http://hdl.handle.net/2237/0002002164
3de9ce1a-a1d8-43a1-8939-35951e6ec8d4
名前 / ファイル ライセンス アクション
5_0070912.pdf 5_0070912.pdf (2.4 MB)
Item type itemtype_ver1(1)
公開日 2022-03-08
タイトル
タイトル Turbulent characteristics and energy transfer in the far field of active-grid turbulence
言語 en
著者 Zheng, Y.

× Zheng, Y.

en Zheng, Y.

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Nagata, K.

× Nagata, K.

en Nagata, K.

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Watanabe, T.

× Watanabe, T.

en Watanabe, T.

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利
言語 en
権利情報 Copyright 2021 Author(s). Published under an exclusive license by AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in (Physics of Fluids 33, 115119 (2021)) and may be found at (https://doi.org/10.1063/5.0070912).
内容記述
内容記述 Turbulent characteristics in the far field of active-grid turbulence have been investigated through wind tunnel experiments using hot-wire anemometry. Two forcing protocols are employed following previous studies: one is the double-random mode and the other is the open mode with the grid remaining static with minimum blockage. The integral length scale L for the double-random modes slightly decreases with streamwise distance in the far field as observed in the near field of the active-grid turbulence. The nondimensional dissipation rate 𝐶𝜀 for the double-random modes is around 0.5. This asymptotic value is different from those reported in previous active-grid turbulence experiments and could be nonuniversal. The equilibrium scaling 𝐿/𝜆=𝐶𝜀𝑅𝑒𝜆/15 (λ is the Taylor microscale and 𝑅𝑒𝜆 is the turbulent Reynolds number) with a constant 𝐶𝜀 is established in the far field of the double-random modes regardless of active-grid motions. The sum of production and destruction terms in the enstrophy budget equation for homogeneous and isotropic turbulence 𝑆+2𝐺/𝑅𝑒𝜆 (S is the skewness of the longitudinal velocity derivative and G is the destruction coefficient) is proportional to 𝑅𝑒𝜆^-1 and close to zero in the present active-grid turbulence, suggesting that the equilibrium scaling is possibly related to the balance between the production and destruction of the enstrophy.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 AIP Publishing
言語
言語 eng
資源タイプ
資源タイプresource http://purl.org/coar/resource_type/c_6501
タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1063/5.0070912
収録物識別子
収録物識別子タイプ PISSN
収録物識別子 1070-6631
書誌情報 en : Physics of Fluids

巻 33, 号 11, p. 115119, 発行日 2021-11-16
ファイル公開日
日付 2022-11-16
日付タイプ Available
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