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Turbulent characteristics and energy transfer in the far field of active-grid turbulence
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 | |
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Download is available from 2022/11/15.
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Item type | itemtype_ver1(1) | |||||||||||
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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.
× Nagata, K.
× Watanabe, T.
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アクセス権 | ||||||||||||
アクセス権 | embargoed access | |||||||||||
アクセス権URI | http://purl.org/coar/access_right/c_f1cf | |||||||||||
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 | |||||||||||
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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 | |||||||||||
関連識別子 | ||||||||||||
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 |
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ファイル公開日 | ||||||||||||
日付 | 2022-11-16 | |||||||||||
日付タイプ | Available |