TY  - JOUR
AU  - Piriz, S. A.
AU  - Piriz, A. R.
AU  - Tahir, N. A.
TI  - Magneto-Rayleigh–Taylor instability in an elastic finite-width medium overlying an ideal fluid
JO  - Journal of fluid mechanics
VL  - 867
SN  - 1469-7645
CY  - Cambridge [u.a.]
PB  - Cambridge Univ. Press
M1  - GSI-2019-00585
SP  - 1012 - 1042
PY  - 2019
N1  - This is an Open Access article, distributed under the terms of the Creative Commons Attributionlicence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, andreproduction in any medium, provided the original work is properly cited.
AB  - We present the linear theory of two-dimensional incompressible magneto-Rayleigh–Taylor instability in a system composed of a linear elastic (Hookean) layer above a lighter semi-infinite ideal fluid with magnetic fields present, above and below the layer. As expected, magnetic field effects and elasticity effects together enhance the stability of thick layers. However, the situation becomes more complicated for relatively thin slabs, and a number of new and unexpected phenomena are observed. In particular, when the magnetic field beneath the layer dominates, its effects compete with effects due to elasticity, and counteract the stabilising effects of the elasticity. As a consequence, the layer can become more unstable than when only one of these stabilising mechanisms is acting. This somewhat unexpected result is explained by the different physical mechanisms for which elasticity and magnetic fields stabilise the system. Implications for experiments on magnetically driven accelerated plates and implosions are discussed. Moreover, the relevance for triggering of crust-quakes in strongly magnetised neutron stars is also pointed out.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000463074700001
DO  - DOI:10.1017/jfm.2019.193
UR  - https://repository.gsi.de/record/218700
ER  -