Taylor vortices in annular spherical flow at large aspect ratios
Taylor vortices in annular spherical flow at large aspect ratios
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DOI：
10.1063/1.1737775
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发表时间：
2004-06
影响因子：
4.6
通讯作者：
V. Loukopoulos;G. Karahalios
中科院分区：
文献类型：
--
作者：
V. Loukopoulos;G. Karahalios
受最近的理论和实验工作的启发，我们数值研究了球形Couette流动，以期首次获得大纵横比σ（如0.38，0.42和0.48）的Taylor涡。据发现，泰勒涡可以存在，稳定的或随时间变化的，在一个范围内的雷诺数[Re 1，Re 2]和它们的形成取决于纵横比，对施加的各种旋转条件的边界上，在历史上的流动和在能量被转移到流体的最终值的速率。随着σ的增加，范围[Re1，Re2]表现出明显的缩短趋势。
Motivated by recent theoretical and experimental work, we numerically investigate spherical Couette flow with a view to obtaining for the first time Taylor vortices at large aspect ratios σ such as 0.38, 0.42, and 0.48. It is found that Taylor vortices can exist, stable or time-dependent, in a range of Reynolds numbers [Re1, Re2] and their formation depends on the aspect ratio, on the imposition of various rotationary conditions on the boundaries, on the history of the flow and on the rate at which energy is transferred into the fluid to its final value. With increasing σ the range [Re1, Re2] manifests a clear tendency to shorten.