WEKO3
アイテム
Diffusion of turbulent plume around a sphere
https://doi.org/10.18999/memsenu.45.2.135
https://doi.org/10.18999/memsenu.45.2.135e46ca0ae-38fb-492b-ae1f-97f73ecd8631
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
45-2-01.pdf (3.9 MB)
|
|
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-10-23 | |||||
| タイトル | ||||||
| タイトル | Diffusion of turbulent plume around a sphere | |||||
| 言語 | en | |||||
| 著者 |
Nakamura, Ikuo
× Nakamura, Ikuo× Sakai, Yasuhiko× Tsunoda, Hiroyuki× Liu, Shengjian |
|||||
| 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 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this research, we investigated the influences of the distortion of the flow generated by a sphere on the behaviors of velocity turbulence and plume diffusion. The incident turbulent flow was created by a biplainer square grid, so that the turbulence intensity decays downstream but the velocity field can be recognized roughly isotropic in the upstream region of the sphere. The diffusion field is an axisymmetric point-source plume which develops in this decaying grid turbulence and runs against the sphere frontally. Before giving the concrete experimental results and discussions, a general explanation on the effect of an obstacle on the turbulent diffusion is provided and the scientific significance of this research is clarified. In the second chapter, after an account of experimental instruments, the details of the conventional statistics of velocity and concentration field are provided. Special concerns are given to the variations of the velocity and concentration fluctuation intensity near the stagnation point. It is shown that the balance equations of velocity and concentration fluctuation intensity are very useful to understand these phenomena. In the third chapter, discussed are mainly the radial distributions of conventional and conditional statistics of concentration field around the sphere and the variation of the concentration detecting frequency along the stagnation line. The data are summarized by imaging a striation structure of a diffusing plume. The final chapter gives a detailed examination of the fractal feature of sets of iso concentration points taken from data on the stagnation line. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | School of Engineering, Nagoya University | |||||
| 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 | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/memsenu.45.2.135 | |||||
| ID登録タイプ | JaLC | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0919-0805 | |||||
| 書誌情報 |
en : Memoirs of the School of Engineering, Nagoya University 巻 45, 号 2, p. 135-184, 発行日 1994-03-31 |
|||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
