Fig. A.1.
Mean magnetic field as a function of time and numerical diffusivity for the case with χc = 0.5. The solid line represents a simulation with adiff = 2.5 × 10−4 (in normalised units) while the dashed and the dotted lines correspond to simulations with adiff = 2.5 × 10−3 and adiff = 2.5 × 10−2, respectively. Black and red lines represent the cases with αeff = 0 and αeff = α.
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