| 発表年月日 | 1997/12/19 |
|---|---|
| 発表テーマ | 円筒容器内渦崩壊の数値的研究 |
| 会議名 | 第11回数値流体シンポジウム |
| 主催者 | 日本流体力学会 |
| 開催地名 | 東京 |
| 学会区分 | 全国学会 |
| 発表形式 | 口頭（一般） |
| 単独共同区分 | 単独 |
| 国名 | 日本 |
| 開催期間 | 1997/12/18 ～ 1997/12/20 |
| 発表者・共同発表者 | 岩津 玲磨 |
| 概要 | Numerica1 study was conducted on the axisymmetric steady vortex breakdown of incompressible viscous fluid within a cylindrical container with rotating upper lid. The rotational Reynolds number Re and the container aspect ratio h are _the governing physical parameters. By varying Re and h, regions of no separation bubble., one, two, up to three bubbles are reported in the past experimental studies. In the present numerical study, carefully devised grid systems with different grid points density and the time increment enables us to obtain grid convergent solutions. By means of thorough parametric studies, regime-diagram of (Re, h) is numerically reconstructed. Further plots on the flow field are presented which reveal the detailed information on the breakdown bubbles not clearly indicated in the past experimental studies. |