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Numerical simulations of turbulent dynamos
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classification
astro-ph
keywords
alphabehaviourcalculationcatastrophicconservationdevelopdynamodynamos
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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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