The Lorentz force effect on the On-Off dynamo intermittency
| dc.creator | Alexakis, Alexandros | |
| dc.creator | Ponty, Yannick | |
| dc.date | 2007-09-29 | |
| dc.date.accessioned | 2026-07-07T08:33:07Z | |
| dc.date.available | 2026-07-07T08:33:07Z | |
| dc.description | An investigation of the dynamo instability close to the threshold produced by an ABC forced flow is presented. We focus on the on-off intermittency behavior of the dynamo and the counter-effect of the Lorentz force in the non-linear stage of the dynamo. The Lorentz force drastically alters the statistics of the turbulent fluctuations of the flow and reduces their amplitude. As a result much longer burst (on-phases) are observed than what is expected based on the amplitude of the fluctuations in the kinematic regime of the dynamo. For large Reynolds numbers, the duration time of the ``On'' phase follows a power law distribution, while for smaller Reynolds numbers the Lorentz force completely kills the noise and the system transits from a chaotic state into a ``laminar'' time periodic flow. The behavior of the On-Off intermittency as the Reynolds number is increased is also examined. The connections with dynamo experiments and theoretical modeling are discussed. | |
| dc.description | 8 pages | |
| dc.identifier | https://arxiv.org/abs/0710.0063 | |
| dc.identifier | http://arxiv.org/abs/0710.0063 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/139018 | |
| dc.subject | Fluid Dynamics | |
| dc.subject | Astrophysics | |
| dc.subject | Chaotic Dynamics | |
| dc.title | The Lorentz force effect on the On-Off dynamo intermittency | |
| dc.type | text |