| タイトル | Tornadolike gravity-driven vortex model |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740021937 |
| 著者（英） | Deissler, R. G.; Boldman, D. R. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1974-08-01 |
| 言語 | eng |
| 内容記述 | The buoyancy-induced vorticity concentration produced as the fluid in a vortex accelerates vertically was studied. The boiloff from liquid nitrogen, to which a small amount of initial vorticity was added, provided a source of cool, heavy gas in which a concentration of vorticity took place. Condensation streamers made the flow visible. It is shown that the presence of a surface boundary layer is not necessary for the effective concentration of vorticity. A simple theoretical analysis of the phenomenon was also made. A radial contraction of the flow with vertical position and a characteristic hook shape in the top view of the streamlines were observed in both theory and experiment. The vorticity concentration observed may be similar to that which occurs in tornadoes. |
| NASA分類 | METEOROLOGY |
| レポートNO | 74N30050
NASA-TN-D-7738
E-7917 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/193599 |
