WEKO3
アイテム
Large-scale structure of velocity and passive scalar fields in freely decaying homogeneous anisotropic turbulence
http://hdl.handle.net/2237/00028745
http://hdl.handle.net/2237/0002874518da0be0-d45b-4e40-873a-c152f921de7b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PhysRevFluids3_104601 (277.3 kB)
|
|
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-10-25 | |||||
| タイトル | ||||||
| タイトル | Large-scale structure of velocity and passive scalar fields in freely decaying homogeneous anisotropic turbulence | |||||
| 言語 | en | |||||
| 著者 |
Yoshimatsu, Katsunori
× Yoshimatsu, Katsunori× Kaneda, Yukio |
|||||
| 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 | © 2018 American Physical Society | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We consider freely decaying homogeneous anisotropic turbulence whose energy spectrum E(k) at k→0 is given by E(k)=Ck2+o(k2) at an initial instant, where k is the wave number and C is a k-independent positive number. An argument is given to show that there are an infinite number of invariants characterizing the large-scale structure of the turbulence. This is a generalization of Saffman's argument, which shows the existence of a finite number of invariants [P. G. Saffman, J. Fluid Mech. 27, 581 (1967)]. By applying a similar argument to homogeneous anisotropic passive scalar turbulence without any scalar source, we show that there are an infinite number of invariants characterizing the large-scale structure of passive scalar fields. Theoretical analysis based on the invariance and a self-similarity assumption for the large-scale evolution shows that the anisotropy of the velocity and passive scalar fields is persistent at large scales. The decay laws of the velocity and passive scalar fields are derived by a simple dimensional analysis. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | American Physical Society | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 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 | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1103/PhysRevFluids.3.104601 | |||||
| ISSN（Online） | ||||||
| 収録物識別子タイプ | EISSN | |||||
| 収録物識別子 | 2469-990X | |||||
| 書誌情報 |
en : Physical Review Fluids 巻 3, 号 10, 発行日 2018-10 |
|||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
