The Sun and other stars are magnetic: magnetism pervades their interiors and affects their
evolution in a variety of ways. In the Sun, both the fields themselves and their influence on …

We present an attempt to reach realistic turbulent regime in direct numerical simulations of
the geodynamo. We rely on a sequence of three convection-driven simulations in a rapidly …

These lecture notes are based on a tutorial given in 2017 at a plasma physics winter school
in Les Houches. Their aim is to provide a self-contained graduate-student level introduction …

Magnetic field generation and evolution in celestial bodies—the subject matter of the theory
of the dynamo—held Ya B Zeldovich's interest for years. Over the time since then, the study …

The generation of a magnetic field in an electrically conducting fluid generally involves the
complicated nonlinear interaction of flow turbulence, rotation and field. This dynamo process …

Magnetic fields play an important role in the dynamics of present-day molecular clouds.
Recent work has shown that magnetic fields are equally important for primordial clouds …

Magnetic fields on small scales are ubiquitous in the Universe. Although they can often be
observed in detail, their generation mechanisms are not fully understood. One possibility is …

The 11-year solar magnetic cycle shows a high degree of coherence in spite of the turbulent
nature of the solar convection zone. It has been found in recent high-resolution …

Turbulence in three dimensions (3D) supports vortex stretching that has long been known to
accomplish energy transfer to small scales. Moreover, net energy transfer from large-scale …

The last thirty years have seen great leaps forward in the subject of magnetoconvection.
Computational techniques can now explain exotic nonlinear behaviour, transition to chaos …