LABORATORY SIMULATION OF JUPITERS GREAT RED SPOT
LABORATORY SIMULATION OF JUPITERS GREAT RED SPOT
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DOI：
10.1038/331689a0
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发表时间：
1988-02-25
期刊：
影响因子：
64.8
通讯作者：
SWINNEY, HL
中科院分区：
文献类型：
--
作者：
SOMMERIA, J;MEYERS, SD;SWINNEY, HL
长期以来，在木星大气中一直观察到孤立的大型稳定漩涡，最近在土星上也观察到。在强湍流行星大气中存在这样的稳定涡旋是流体力学中的一个具有挑战性的问题。在一次数值模拟中，Marcus1发现在旋转环空的湍流剪切流中，在各种条件下都会形成一个单一的稳定涡。为了验证这一点，我们在一个旋转的环空中进行了一个实验，环空中充满了径向泵送的流体。环空刚性旋转（没有微分旋转），但科里奥利力对径向泵送流体的作用产生反向旋转射流。在这种湍流射流中自发形成连贯的漩涡，并且在很大范围的旋转和泵送速率下，流动演变直到只剩下一个大漩涡。
Isolated large stable vortices have long been observed in the jovian atmosphere and more recently on Saturn. The existence of such stable vortices in strongly turbulent planetary atmospheres is a challenging problem in fluid mechanics. In a numerical simulation Marcus1 found that a single stable vortex developed for a wide variety of conditions in a turbulent shear flow in a rotating annulus. To test this we conducted an experiment on a rotating annulus filled with fluid pumped in the radial direction. The annulus rotates rigidly (there is no differential rotation), but the action of the Coriolis force on the radially pumped fluid produces a counter-rotating jet. Coherent vortices spontaneously form in this turbulent jet, and for a wide range of rotation and pumping rates the flow evolves until only one large vortex remains.