Great progress has been made in the numerical simulation of planetary dynamos, though
these numerical experiments still operate in a regime very far from the planets. For example …

We perform direct numerical simulations and analyze the ring-to-ring energy transfer in the
three-dimensional hydrodynamic turbulence rendered anisotropic by rapid rotation. The …

Young protoplanetary discs and the outer radii of active galactic nuclei may be subject to
gravitational instability and, as a consequence, fall into a 'gravitoturbulent'state. While in this …

Recent numerical simulations showed that mean flow is generated in the inhomogeneous
turbulence of an incompressible fluid that is accompanied by helicity and system rotation. In …

In this paper, we investigate the statistical features of a fully developed, forced, rapidly
rotating, turbulent system using numerical simulations and model the energy spectrum that …

Observations of the Earth's magnetic field have revealed locally pronounced field minima
near each pole at the core–mantle boundary (CMB). The existence of the polar magnetic …

In most numerical simulations of the Earth's core the dynamo resides outside the tangent
cylinder and may be crudely classified as being of the α 2 type. In this region the flow …

Kinetic helicity and its spatial distribution are thought to be important for the maintenance of
a dipolar magnetic field in the geodynamo through the α-effect. Outside the inner core …

The distribution of kinetic helicity in a dipolar planetary dynamo is central to the success of
that dynamo. Motivated by the helicity distributions observed in numerical simulations of the …

We study the propagation of inertial waves (IWs) generated by an axisymmetric torus
oscillating at frequency ω f in a rotating fluid. Inertial waves are emitted from the torus and …