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- W1497384622 abstract "Much of the progress in our understanding of dynamo mechanisms has been made within the theoretical framework of magnetohydrodynamics (MHD). However, for sufficiently diffuse media, the Hall effect eventually becomes non-negligible. We present results from three dimensional simulations of the Hall-MHD equations subjected to random non-helical forcing. We study the role of the Hall effect in the dynamo efficiency for different values of the Hall parameter, using a pseudospectral code to achieve exponentially fast convergence. We also study energy transfer rates among spatial scales to determine the relative importance of the various nonlinear effects in the dynamo process and in the energy cascade. The Hall effect produces a reduction of the direct energy cascade at scales larger than the Hall scale, and therefore leads to smaller energy dissipation rates. Finally, we present results stemming from simulations at large magnetic Prandtl numbers, which is the relevant regime in hot and diffuse media such a the interstellar medium." @default.
- W1497384622 created "2016-06-24" @default.
- W1497384622 creator A5007082915 @default.
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- W1497384622 date "2010-09-27" @default.
- W1497384622 modified "2023-10-06" @default.
- W1497384622 title "Hall-magnetohydrodynamic small-scale dynamos" @default.
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- W1497384622 doi "https://doi.org/10.1103/physreve.82.036406" @default.
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