On the interaction between convection and magnetic fields
On the interaction between convection and magnetic fields
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DOI：
10.1086/374313
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发表时间：
2003-05-10
影响因子：
4.9
通讯作者：
Weiss, N
中科院分区：
文献类型：
--
作者：
Cattaneo, F;Emonet, T;Weiss, N
太阳光球层中的湍流对流可以充当小型发电机，维持局部强烈的无序磁场。另一方面，在存在强的外部强加磁场的情况下（例如在太阳黑子中），对流会受到抑制。布辛涅斯克流体中高度非线性磁对流的大规模三维数值实验表明，随着外加磁场强度的逐渐增加，从发电机状态通过对流状态到振荡状态的连续转变。对这些不同制度中发现的模式进行了描述和分析。
Turbulent convection in the solar photosphere can act as a small-scale dynamo, maintaining a disordered magnetic field that is locally intense. On the other hand, convection is inhibited in the presence of a strong, externally imposed magnetic field, as for instance, in a sunspot. Large-scale, three-dimensional, numerical experiments on highly nonlinear magnetoconvection in a Boussinesq fluid show that there is a continuous transition from a dynamo regime through a convective regime to an oscillatory regime as the strength of the imposed magnetic field is progressively increased. The patterns found in these different regimes are described and analyzed.