| 言語種別 | 英語 |
|---|---|
| 発行・発表の年月 | 2019 |
| 形態種別 | 国際会議論文 |
| 査読 | 査読あり |
| 標題 | Unsteady vortex breakdown phenomena in an enclosed cylindrical container with a rotating disk |
| 執筆形態 | 共著 |
| 掲載誌名 | Proc. ASME-JSME-KSME 2019 Joint Fluids Engineering Conference |
| 掲載区分 | 国外 |
| 出版社・発行元 | ASME |
| 巻・号・頁 | AJK2019-4751 |
| 総ページ数 | 10 |
| 著者・共著者 | Yuki NAKATSUKA, Reima IWATSU, Jae Min Hyun, Hide S. KOYAMA |
| 概要 | A high-quality precision-controlled turntable apparatus was fabricated to probe the dynamic behavior of a viscous fluid contained in a cylindrical container. Vortex breakdown(s) produced by a rotating endwall disk was visualized by using a fluorescent dye injection technique, and its flow field was measured by using a particle image velocimetry. Limiting boundaries for single, double and triple vortex breakdowns in steady flow were re-plotted to compare with the previous visualization studies of Escudier. The locations of stagnation points of the vortex breakdown bubble(s) in steady flow were measured quantitatively. In unsteady flow, the amplitude and time period of periodic axial oscillation, and the polar angle and time period of precession, were measured. The domains for periodic axial oscillation and for precession in unsteady flow were delineated. |
| researchmap用URL | https://event.asme.org/AJKFluids/Program/#/AJKFLUIDS2019/sessions/174 |