On the saturation of astrophysical dynamos: Numerical experiments with the no-cosines flow
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In the context of astrophysical dynamos we illustrate that the no-cosines flow, with zero mean helicity, can drive fast dynamo action and we study the dynamo's mode of operation during both the linear and non-linear saturation regimes. It turns out that in addition to a high growth rate in the linear regime, the dynamo saturates at a level significantly higher than normal turbulent dynamos, namely at exact equipartition when the magnetic Prandtl number Prm~ 1. Visualization of the magnetic and velocity fields at saturation will help us to understand some of the aspects of the non-linear dynamo problem.
Udgivelsesdato: 2 May
Udgivelsesdato: 2 May
Originalsprog | Engelsk |
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Tidsskrift | Solar Physics |
Vol/bind | 224 |
Udgave nummer | 1-2 |
Sider (fra-til) | 171-178 |
ISSN | 0038-0938 |
DOI | |
Status | Udgivet - 2004 |
ID: 69266