Inverse cascade in decaying three-dimensional magnetohydrodynamic turbulence

Christensson, Mattias, Hindmarsh, Mark and Brandenburg, Axel (2001) Inverse cascade in decaying three-dimensional magnetohydrodynamic turbulence. Physical Review E, 64 (5). 056405.

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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 transfered 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.

Item Type: Article
Additional Information: Collaboration leader and supervisor of research student Christensson, adapting code written by Brandenburg. The results are of great utility for studies of the evolution of primordial magnetic fields in cosmology, helping to make predictions for field strengths today.
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Mark Hindmarsh
Date Deposited: 06 Feb 2012 20:13
Last Modified: 07 Mar 2017 09:24
URI: http://sro.sussex.ac.uk/id/eprint/24802

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