Direct simulations of helical Hall-MHD turbulence and dynamo action
arXiv:astro-ph/0410274 · doi:10.1086/426534
Abstract
Direct numerical simulations of turbulent Hall dynamos are presented. The evolution of an initially weak and small scale magnetic field in a system maintained in a stationary turbulent regime by a stirring force at a macroscopic scale is studied to explore the conditions for exponential growth of the magnetic energy. Scaling of the dynamo efficiency with the Reynolds numbers is studied, and the resulting total energy spectra are found to be compatible with a Kolmogorov type law. A faster growth of large scale magnetic fields is observed at intermediate intensities of the Hall effect.
arXiv comment13 pages, 17 figures, ApJ (in press)
References in corpus (10)
- The inverse cascade and nonlinear alpha-effect in simulations of isotropic helical hydromagnetic turbulence
- Simulations of nonhelical hydromagnetic turbulence
- Linear Analysis of the Hall Effect in Protostellar Disks
- The Joint Cascade of Energy and Helicity in Three-Dimensional Turbulence
- The Effect of the Hall Term on the Nonlinear Evolution of the Magnetorotational Instability: I. Local Axisymmetric Simulations
- Is nonhelical hydromagnetic turbulence peaked at small scales?
- Turbulent Dynamos and Magnetic Helicity
- Direct simulations of helical Hall-MHD turbulence and dynamo action
- Resolution of an ambiguity in dynamo theory and its consequences for back reaction studies
- Waves, Coriolis force and the dynamo effect
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