| タイトル | Visualization of turbulence in flow about a bluff body |
| 著者（英） | Brauer, H. J.; Sadeh, W. Z. |
| 著者所属（英） | Colorado State Univ. |
| 発行日 | 1979-01-01 |
| 言語 | eng |
| 内容記述 | A visual diagnostic investigation of turbulence in flow about a circular cylinder was conducted in order to gain a physical insight into the model for the structure of turbulence in flow around a bluff body advanced by the vorticity-amplification theory. A frame-by-frame qualitative and quantitative examination of selected movie strips over time intervals up to more than 800 ms was performed. The selective stretching of cross-vortex tubes, their streamwise tilting, the emergence of an organized turbulent flow pattern near the stagnation zone and the growth of a turbulent boundary layer were clearly revealed by the visualization. In particular, the visualization indicated that the cross-vortex tubes conveyed by the diverging stagnation flow constitute a coherent substructure within the overall turbulent flow that is triggered to its fullest manifestation by the stretching mechanism. |
| NASA分類 | AERODYNAMICS |
| レポートNO | 80A32832 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/422031 |
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