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arXiv 0906.3792physics.flu-dyn
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VKS实验的数值模型

A numerical model of the VKS experiment

Christophe Gissinger

摘要:

我们提出了数值模拟的磁场所产生的液体钠流由两个反向旋转叶轮(VKS实验)。使用发电机运动学代码在圆柱形的几何形状,它示出了不同的磁模式,可以产生取决于流配置。虽然时间平均的轴对称平均流产生赤道偶极子,我们的模拟表明,无论是偶极或四极对称的轴向场可以通过考虑非轴对称组件的流产生。此外,我们表明,通过打破对称的流动,磁场变得振荡。这导致轴向偶极极性的反转,涉及与四极分量的竞争。

英文摘要:

We present numerical simulations of the magnetic field generated by the flow of liquid sodium driven by two counter-rotating impellers (VKS experiment). Using a dynamo kinematic code in cylindrical geometry, it is shown that different magnetic modes can be generated depending on the flow configuration. While the time averaged axisymmetric mean flow generates an equatorial dipole, our simulations show that an axial field of either dipolar or quadrupolar symmetry can be generated by taking into account non-axisymmetric components of the flow. Moreover, we show that by breaking a symmetry of the flow, the magnetic field becomes oscillatory. This leads to reversals of the axial dipole polarity, involving a competition with the quadrupolar component.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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