A Moffatt-Arnold formula for the mutual helicity of linked flux tubes
- 1 June 1993
- journal article
- research article
- Published by Taylor & Francis in Geophysical & Astrophysical Fluid Dynamics
- Vol. 69 (1-4) , 243-256
- https://doi.org/10.1080/03091929308203581
Abstract
We show that Moffat's formula for the helicity of linked flux tubes is valid for arbitrary field line structure provided that helicity is replaced by mutual helicity, i.e. if self-helicities are excluded. We use Arnold's recent notion of asymptotic linking number to derive our result.Keywords
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