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

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.
Authors:
 [1] ;  [2] ;  [1]
  1. National Academy of Sciences of Ukraine, Institute of Single Crystals (Ukraine)
  2. Université de Toulouse (USP), CNRS, Institute de Recherche en Astrophysique et Planetologie (France)
Publication Date:
OSTI Identifier:
22472303
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 120; Journal Issue: 4; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ASYMPTOTIC SOLUTIONS; CONVECTIVE INSTABILITIES; FREQUENCY DEPENDENCE; HELICITY; MAGNETIC FIELDS; VELOCITY