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

Journal Article · Wed Apr 15 00:00:00 EDT 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115040081· OSTI ID:22472303

Kopp, M. I. ^[1]; Tur, A. V. ^[2]

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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)

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.

• OSTI ID: 22472303
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 120, Issue 4; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMPTOTIC SOLUTIONS
CONVECTIVE INSTABILITIES
FREQUENCY DEPENDENCE
HELICITY
MAGNETIC FIELDS
VELOCITY