| タイトル | A study of baroclinic instability in a cylindrical annulus with the temperature gradient imposed on the lower surface |
| 著者（英） | Reynolds, Nathaniel D.; Miller, Timothy L. |
| 著者所属（英） | Alabama Univ.|NASA Marshall Space Flight Center |
| 発行日 | 1991-12-01 |
| 言語 | eng |
| 内容記述 | Results are presented from experimental and numerical-modeling studies carried out on a rotating thermally driven fluid system in a cylindrical annulus with the horizontal gradient imposed upon the lower horizontal surface. The rotation rate and the temperature difference were varied to construct a regime diagram in thermal Rossby-number/Taylor-number space. It is shown that the curve separating the axisymmetric flow from the wave flow is 'knee-shaped', similar to the conventional side-heated and side-cooled baroclinic annulus. The experimentally observed transition curve agrees well with numerical calculations and the agreement between the predicted and measured wavenumbers is good both near the transition and within the wave regime. Away from the transition curve and well within the wave regime, there is an evolution from larger to smaller wavenumbers as the flow equilibrates, which is well captured by the numerical model for these cases. |
| NASA分類 | FLUID MECHANICS AND HEAT TRANSFER |
| レポートNO | 92A19963 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/330212 |
