title: Inverse cascade in decaying three-dimensional magnetohydrodynamic turbulence.
abstract: We perform direct numerical simulations of three-dimensional freely decaying magnetohydrodynamic turbulence. For helical magnetic fields, an inverse cascade effect is observed in which power is transferred from smaller scales to larger scales. The magnetic field reaches a scaling regime with self-similar evolution, and power-law behavior at high wave numbers. We also find power-law decay in the magnetic and kinematic energies, and power-law growth in the characteristic length scale of the magnetic field.
authors.affiliation: Centre for Theoretical Physics, University of Sussex, Brighton BN1 9QJ, United Kingdom. kapl7@pact.cpes.susx.ac.uk
authors.forename: M
authors.initials: M
authors.lastname: Christensson
authors.forename: M
authors.initials: M
authors.lastname: Hindmarsh
authors.forename: A
authors.initials: A
authors.lastname: Brandenburg