Instability of MHD-modified interfacial gravity waves revisited

Citation
A. Lukyanov et al., Instability of MHD-modified interfacial gravity waves revisited, PHYS LETT A, 290(3-4), 2001, pp. 165-172
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
290
Issue
3-4
Year of publication
2001
Pages
165 - 172
Database
ISI
SICI code
0375-9601(20011112)290:3-4<165:IOMIGW>2.0.ZU;2-R
Abstract
We reveal the basic mechanism of instability of the two-layer conductive fl uid system carrying a normal current and exposed to a uniform external magn etic field. This process is a reflection of a MHD-modified interfacial grav ity wave from the boundary. Due to special boundary conditions, the reflect ion coefficient turns out to be greater than I for some directions of the w ave propagation. We consider two cases: reflection of a monochromatic plane wave from the plane boundary and reflection of rotating waves in a circula r geometry. We believe that the proposed mechanism gives a new understandin g of the instability formation in the system 'liquid metal-electrolyte' typ e. (C) 2001 Elsevier Science B.V. All rights reserved.