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Parametric instability in periodically perturbed dynamos

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Academic year: 2021

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Figure 1. Contour plot of the axisymmetric velocity field. The colors denote the azimuthal velocity component and the arrows represent the poloidal component of the axisymmetric velocity field.
Figure 2. Cut of the velocity perturbation in the equatorial plane. The axial dependence of the perturbation ensures that U m vanishes at the top and bottom boundaries
Figure 4. Magnetic field energy density B 2 for Rm = 60 (left) and Rm = 120 (right). The isosurfaces are colored with the azimuthal field.
Figure 5. Evolution of the structure of the axial magnetic field component B z during one oscillation period
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