论文标题
旋转球中流体动力和磁流失动力的湍流的行为，并具有动力和发电机的作用
Behavior of hydrodynamic and magnetohydrodynamic turbulence in a rotating sphere with precession and dynamo action
论文作者
论文摘要
在不可压缩的流体动力学（HD）和磁性水力学（MHD）方案中，研究了充满流体的旋转球体中进动的效果。在这两种情况下，分析了渐近状态及其与旋转频率和进动频率的依赖性。对于MHD案例，没有发现用于前进案例的自我维持的发电机，而另一方面，在上面发现了批判性的逆行进动频率，而Dynamo动作是自我维持的。还发现这些对应于具有开发的湍流状态的小规模发电机。此外，观察到存在磁偶极力矩的逆转，而在较小的进液频率之间的等待时间更长。
The effect of precession in a rotating sphere filled with fluid was studied with direct numerical simulations, both in the incompressible hydrodynamics (HD) and magnetohydrodynamics (MHD) scenarios. In both cases the asymptotic state and its dependence with both rotating and precession frequency was analyzed. For the MHD case no self-sustaining dynamos were found for the prograde precession case, whereas on the other hand a critical retrograde precession frequency was found above which dynamo action is self-sustained. It was also found that these correspond to small-scale dynamos with a developed turbulent regime. Furthermore, it is observed the presence of reversals of the magnetic dipole moment with greater waiting times between reversals for smaller precession frequencies.
