Abstract

We study the free radial expansion of a 3-component magnetic configuration. The emphasis of this paper is on the behaviour of a field undergoing non-self-similar expansion. Comparing our results with the evolution of a magnetic configuration expanding self-similarly, we find that self-similar expansion appears as the asymptotic limit (with time) of the general case. Using a model field we show that a non-self-similar velocity profile need not have a strict monotonie decrease with time.

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