Abstract
Kinematic generation of electrically conductive fluid by space-periodic flow is considered. The generated magnetic modes have a form of a product of three-dimensional field having the same spatial periodicity and a Fourier harmonic whose wave vector q is an arbitrary constant. We present the examples of computation of the modes associated with the maximum (over q) growth rates for a generic flow velocity where the magnetic α-effect is present and for a parity-invariant flow lacking the α-effect and featuring negative magnetic eddy diffusivity. It is shown that magnetic modes associated with the maximum over q growth rates are characterized by weak separation of spatial scales, and, therefore, neither of the two noted effects can be regarded as the main mechanism responsible for their generation.
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