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Flow of a thin liquid-metal film in a toroidal magnetic field

Abstract:
We investigate the gravity-driven flow of a thin film of liquid metal on a conducting conical substrate in the presence of a strong toroidal magnetic field (transverse to the flow and parallel to the substrate). We solve the leading-order governing equations in a physically relevant asymptotic limit to find the free-surface profile. We find that the leading-order fluid flow rate is a non-monotonic bounded function of the film height, and this can lead to singularities in the free-surface profile. We perform a detailed stability analysis and identify values of the relevant geometric, hydrodynamic and magnetic parameters such that the flow is stable.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1017/jfm.2019.173

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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author


Publisher:
Cambridge University Press
Journal:
Journal of Fluid Mechanics More from this journal
Volume:
867
Pages:
835–876
Publication date:
2019-03-28
Acceptance date:
2019-02-23
DOI:
ISSN:
0022-1120


Keywords:
Pubs id:
pubs:985661
UUID:
uuid:19158ea0-a4a0-48c4-bac3-54ef93f88324
Local pid:
pubs:985661
Source identifiers:
985661
Deposit date:
2019-03-28
ARK identifier:

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