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Dynamical Invariance and Self-Similarity of Freely Decaying Homogeneous Nonaxisymmetric Turbulence
http://hdl.handle.net/2237/0002003785
http://hdl.handle.net/2237/00020037859b124ca7-51d9-4034-8444-cbd17f812a0f
名前 / ファイル | ライセンス | アクション |
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yoshimatsu_jpsj2022.pdf (872 KB)
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Item type | itemtype_ver1(1) | |||||||||
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公開日 | 2022-09-14 | |||||||||
タイトル | ||||||||||
タイトル | Dynamical Invariance and Self-Similarity of Freely Decaying Homogeneous Nonaxisymmetric Turbulence | |||||||||
言語 | en | |||||||||
著者 |
Yoshimatsu, Katsunori
× Yoshimatsu, Katsunori
× Kaneda, Yukio
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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 ©2022 The Physical Society of Japan 日本物理学会 | |||||||||
内容記述 | ||||||||||
内容記述タイプ | Abstract | |||||||||
内容記述 | We study the free decay of incompressible homogeneous nonaxisymmetric turbulence with and without helicity, by using direct numerical simulations (DNSs). Its initial energy spectrum E(k), say at t = t0, is given by Ck2 + o(k2) in a sufficiently low k-range, where k is the wavenumber, and C is a positive constant independent of k. We focus our attention to turbulence whose anisotropy is generated by the action of simple mean shear, and consider the decay after the sudden release of the mean shear. The DNSs suggest that at a stage where the turbulence evolves in a self-similar way, the large-scale anisotropy characterized by statistical quantities including the relative velocity correlations is persistent, irrespective of the presence or absence of the initial helicity. The DNSs also suggest that E(k) keeps the form Ck2 + o(k2) at low k for t ≥ t0, and C is time-independent. These DNS results are in accordance with those by a theory about a generalization of a turbulence class of what was argued by Saffman [J. Fluid Mech. 27, 581 (1967)]. | |||||||||
言語 | en | |||||||||
出版者 | ||||||||||
出版者 | 日本物理学会 | |||||||||
言語 | ja | |||||||||
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言語 | eng | |||||||||
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資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
資源タイプ | journal article | |||||||||
出版タイプ | ||||||||||
出版タイプ | AM | |||||||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||
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関連タイプ | isVersionOf | |||||||||
識別子タイプ | DOI | |||||||||
関連識別子 | https://doi.org/10.7566/JPSJ.91.054401 | |||||||||
収録物識別子 | ||||||||||
収録物識別子タイプ | PISSN | |||||||||
収録物識別子 | 0031-9015 | |||||||||
書誌情報 |
en : Journal of the Physical Society of Japan 巻 91, 号 5, p. 054401, 発行日 2022-05-15 |
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ファイル公開日 | ||||||||||
日付 | 2023-05-15 | |||||||||
日付タイプ | Available |