Rotating Rayleigh-Taylor instability

Scase, M.M., Baldwin, K.A. ORCID: 0000-0001-9168-6412 and Hill, R.J.A., 2017. Rotating Rayleigh-Taylor instability. Physical Review Fluids, 2 (2): 024801. ISSN 2469-990X

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Abstract

The effect of rotation upon the classical two-layer Rayleigh-Taylor instability is considered theoretically and compared with previous experimental results. In particular we consider a two-layer system with an axis of rotation that is perpendicular to the interface between the layers. In general we find that a wave mode’s growth rate may be reduced by rotation. We further show that in some cases, unstable axisymmetric wave modes may be stabilized by rotating the system above a critical rotation rate associated with the mode’s wavelength, the Atwood number and the flow’s aspect ratio. We compare our theory with experiments conducted in a magnetic field using ‘heavy’ diamagnetic and ‘light’ paramagnetic fluids and present comparisons between the theoretical predictions and experimental observations.

Item Type: Journal article
Publication Title: Physical Review Fluids
Creators: Scase, M.M., Baldwin, K.A. and Hill, R.J.A.
Publisher: American Physical Society
Date: 2017
Volume: 2
Number: 2
ISSN: 2469-990X
Identifiers:
NumberType
10.1103/physrevfluids.2.024801DOI
Divisions: Schools > School of Science and Technology
Depositing User: Jill Tomkinson
Date Added: 04 Mar 2019 11:12
Last Modified: 18 Sep 2019 10:03
URI: http://irep.ntu.ac.uk/id/eprint/35887

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