Reversals of a large scale field generated over a turbulent background
arXiv:1102.0477 · doi:10.1080/03091929.2011.648629
Abstract
We present a study of several systems in which a large scale field is generated over a turbulent background. These large scale fields usually break a symmetry of the forcing by selecting a direction. Under certain conditions, the large scale field displays reversals so that the symmetry of the forcing is recovered statistically. We present examples of such dynamics in the context of the dynamo instability, of two dimensional turbulent Kolmogorov flows and of turbulent Rayleigh-Bénard convection. In these systems reversals occur respectively for the dynamo magnetic field, for the large scale circulation generated by a periodic forcing in space and for the large scale roll generated by turbulent thermal convection. We compare the mechanisms involved and show that their properties depend on some symmetries of the system and on the way they are broken.
References in corpus (7)
- Generation of magnetic field by dynamo action in a turbulent flow of liquid sodium
- Flow reversals in thermally driven turbulence
- A simple mechanism for the reversals of Earth's magnetic field
- Dynamics of reorientations and reversals of large scale flow in Rayleigh-Benard convection
- On the magnetic fields generated by experimental dynamos
- Chaotic magnetic field reversals in turbulent dynamos
- From reversing to hemispherical dynamos
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