Numerical simulations of turbulent dynamos

Details Numerical simulations of turbulent dynamos Numerical simulations of turbulent dynamos

2000-10-24

arxiv.org/abs/astro-ph/0010495v1

Astronomy and Astrophysics

Astrophysics

3 Pages LaTex, to appear in proceedings of the 24th IAU General Assembly, Joint Discussion 14 "The Origins of Galactic Magneti

Scientific paper

Using a periodic box calculation it is shown that, owing to helicity
conservation, a large scale field can only develop on a resistive timescale.
This behaviour can be reproduced by a mean-field dynamo with alpha and eta_t
quenchings that are equally strong and `catastrophic'.

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