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 …

Turbulence and the associated turbulent transport of scalar and vector fields is a classical
physics problem that has dazzled scientists for over a century, yet many fundamental …

The shear-current effect (SCE) of mean-field dynamo theory refers to the combination of a
shear flow and a turbulent coefficient β 21 with a favourable negative sign for exponential …

Context. The main driving forces supplying energy to the interstellar medium (ISM) are
supernova explosions and stellar winds. Such localized sources are assimilable to curl-free …

A novel large-scale dynamo mechanism, the magnetic shear-current effect, is discussed and
explored. The effect relies on the interaction of magnetic fluctuations with a mean shear flow …

Nonhelical shear dynamos are studied with a particular focus on the possibility of coherent
dynamo action. The primary results—serving as a follow up to the results of Squire & …

In systems where the standard $\alpha $ effect is inoperative, one often explains the
existence of mean magnetic fields by invoking the 'incoherent $\alpha $ effect', which …

The possibility of explaining shear flow dynamos by a magnetic shear-current (MSC) effect is
examined via numerical simulations. Our primary diagnostics is the determination of the …

Here we explore the role of temporal fluctuations in kinetic helicity on the generation of large-
scale magnetic fields in the presence of a background linear shear flow. Key techniques …

Moffatt-drift-driven large-scale dynamo due to α fluctuations with non-zero correlation times
Page 1 J. Fluid Mech. (2016), vol. 798, pp. 696–716. c Cambridge University Press 2016 doi:10.1017/jfm.2016.284 …