Nonlinear dynamo in a short Taylor–Couette setup
Nonlinear dynamo in a short Taylor–Couette setup
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短泰勒-库埃特设置中的非线性发电机
DOI：
10.1063/1.4752756
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发表时间：
2012
影响因子：
4.6
通讯作者：
F. Luddens
中科院分区：
文献类型：
--
作者：
C. Nore;J. Guermond;R. Laguerre;J. Léorat;F. Luddens
通过磁流体动力学代码在数值上证明了具有体积力的短泰勒-库埃特装置可以维持发电机作用。磁阈值与通常在球形几何形状中获得的值相当。线性发电机的特点是旋转的赤道偶极子。非线性状态的特征是波动的动能和磁能以及倾斜偶极子，其轴向分量在时间演化过程中表现出非周期性反转。这些在短泰勒-库埃特装置中发电机作用的数值证据可能对开发实验装置有用。
It is numerically demonstrated by means of a magnetohydrodynamics code that a short Taylor–Couette setup with a body force can sustain dynamo action. The magnetic threshold is comparable to what is usually obtained in spherical geometries. The linear dynamo is characterized by a rotating equatorial dipole. The nonlinear regime is characterized by fluctuating kinetic and magnetic energies and a tilted dipole whose axial component exhibits aperiodic reversals during the time evolution. These numerical evidences of dynamo action in a short Taylor–Couette setup may be useful for developing an experimental device.