Generation of magnetic fields by large-scale vortices in rotating convection
arXiv:1503.08599 · doi:10.1103/PhysRevE.91.041001
Abstract
We propose a new self-consistent dynamo mechanism for the generation of large-scale magnetic fields in natural objects. Recent computational studies have described the formation of large-scale vortices (LSVs) in rotating turbulent convection. Here we demonstrate that for magnetic Reynolds numbers below the threshold for small-scale dynamo action, such turbulent flows can sustain large-scale magnetic fields --- i.e. fields with a significant component on the scale of the system.
8 pages, 6 figures, accepted for publication in Physical Review E
References in corpus (2)
Cited by in corpus (14)
- The effects of Ekman pumping on quasi-geostrophic Rayleigh-Benard convection
- Intertial wave turbulence driven by elliptical instability
- Energy transfers in dynamos with small magnetic Prandtl numbers
- Amplification of large-scale magnetic field in nonhelical magnetohydrodynamics
- Convection-driven kinematic dynamos at low Rossby and magnetic Prandtl numbers
- Magnetic fields driven by tidal mixing in radiative stars
- Jets and large-scale vortices in rotating Rayleigh-Bénard convection
- On the role of thermal boundary conditions in dynamo scaling laws
- Large-scale-vortex dynamos in planar rotating convection
- Discontinuous Transitions Towards Vortex Condensates in Buoyancy-Driven Rotating Turbulence
- Direct numerical simulations of optimal thermal convection in rotating plane layer dynamos
- Strong large scale magnetic fields in rotating convection-driven dynamos: the important role of magnetic diffusion
- Effects of kinematic and magnetic boundary conditions on the dynamics of convection-driven plane layer dynamos
- Spontaneous Generated Convective Anticyclones in Low Latitude -- A Model for the Great Red Spot