Fig. 5

Dependence of ϵf on Gr Co obtained in DNS with imposed field (open symbols, red) and without (closed symbols, blue), for kf/k1 = 30. The black symbols connected by a dotted line correspond to the values of Brandenburg et al. (2012b) for kf/k1 = 5. The horizontal lines correspond to the dynamo threshold for the two values of kf/k1.
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