Numerical Simulations of Kinematic Dynamo Action

Details Numerical Simulations of Kinematic Dynamo Action Numerical Simulations of Kinematic Dynamo Action

2002-04-12

arxiv.org/abs/astro-ph/0204208v3

Astronomy and Astrophysics

Astrophysics

7 pages, 12 PS figures, submitted to A&A (+ slight changes from previous version)

Scientific paper

10.1051/0004-6361:20021568

Numerical simulations of kinematic dynamo action in steady and 3-d ABC flows are presented with special focus on growth rates and multiple periods of the prescribed velocity field. It is found that the difference in growth rate is due to differences in the recycling of the weakest part of the magnetic field. Differences in the topology in cases with and without stagnation points in the imposed velocity field are also investigated, and it is found that the cigar-like structures that develop in the classical A=B=C dynamos, are replaced by ribbon structures in cases where the flow is without stagnation points.

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