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The statistical properties of the subgrid energy transfers of homogeneoussmall-scale dynamo are investigated during the kinematic, nonlinear andstatistically saturated stages. We carry out an a priori analysis of dataobtained from an ensemble of direct numerical simulations on $512^3$ gridpoints and at unity magnetic Prandtl number. In order to provide guidance forsubgrid-scale (SGS) modelling of different types of energy transfer that occurin magnetohydrodynamic dynamos, we consider the SGS stress tensors originatingfrom inertial dynamics, Lorentz force and the magnetic induction separately. Wefind that all SGS energy transfers display some degree of intermittency asquantified by the scale-dependence of their respective probability densityfunctions. Concerning the inertial dynamics, a depletion of intermittencyoccurs in presence of a saturated dynamo.

A-priori study of the subgrid energy transfers for small-scale dynamo in kinematic and saturation regimes