Abstract
The Hall effect plays an interesting role in the context of astrophysical dynamos. Using direct numerical simulation, the dynamo action in Hall magnetohydrodynamic turbulence has been systematically studied. Unlike previous studies, the total Hall contribution has been decomposed, separating the contribution of magnetic and current fields in feeding the large-scale magnetic field. Using scale-specific flux relations, it is shown that the small-scale magnetic and current fields contribute to the large-scale magnetic field growth. Unlike small-scale magnetic fields and large-scale current fields, the small-scale current fields appear to be the leading contributors to small-scale dynamo action.
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