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Large-scale convective instability in an electroconducting medium with small-scale helicity

  • Statistical, Nonlinear, and Soft Matter Physics
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Abstract

A large-scale instability occurring in a stratified conducting medium with small-scale helicity of the velocity field and magnetic fields is detected using an asymptotic many-scale method. Such a helicity is sustained by small external sources for small Reynolds numbers. Two regimes of instability with zero and nonzero frequencies are detected. The criteria for the occurrence of large-scale instability in such a medium are formulated.

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Authors and Affiliations

  1. Institute of Single Crystals, National Academy of Sciences of Ukraine, Kharkiv, 61001, Ukraine

    M. I. Kopp & V. V. Yanovsky

  2. Kharkiv State University, Kharkiv, 61000, Ukraine

    M. I. Kopp & V. V. Yanovsky

  3. Institute de Recherche en Astrophysique et Planetologie, Université de Toulouse [USP], CNRS, Toulouse, 31028, France

    A. V. Tur

Authors
  1. M. I. Kopp
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  2. A. V. Tur
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  3. V. V. Yanovsky
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Correspondence to V. V. Yanovsky.

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Original Russian Text © M.I. Kopp, A.V. Tur, V.V. Yanovsky, 2015, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 147, No. 4, pp. 846–866.

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Kopp, M.I., Tur, A.V. & Yanovsky, V.V. Large-scale convective instability in an electroconducting medium with small-scale helicity. J. Exp. Theor. Phys. 120, 733–750 (2015). https://doi.org/10.1134/S1063776115040081

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  • DOI: https://doi.org/10.1134/S1063776115040081

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