Experimental pub crawl from Rayleigh–Bénard to magnetostrophic convection

Alexander M. Grannan, Jonathan S. Cheng, Ashna Aggarwal, Emily K. Hawkins, Yufan Xu, Susanne Horn, Jose Sánchez-Álvarez, Jonathan M. Aurnou

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
24 Downloads (Pure)

Abstract

The interplay between convective, rotational and magnetic forces defines the dynamics within the electrically conducting regions of planets and stars. Yet their triadic effects are separated from one another in most studies, arguably due to the richness of each subset. In a single laboratory experiment, we apply a fixed heat flux, two different magnetic field strengths and one rotation rate, allowing us to chart a continuous path through Rayleigh–Bénard convection (RBC), two regimes of magnetoconvection, rotating convection and two regimes of rotating magnetoconvection, before finishing back at RBC. Dynamically rapid transitions are determined to exist between jump rope vortex states, thermoelectrically driven magnetoprecessional modes, mixed wall- and oscillatory-mode rotating convection and a novel magnetostrophic wall mode. Thus, our laboratory ‘pub crawl’ provides a coherent intercomparison of the broadly varying responses arising as a function of the magnetorotational forces imposed on a liquid-metal convection system.
Original languageEnglish
Article numberR1
Number of pages13
JournalJournal of Fluid Mechanics
Volume939
Early online date23 Mar 2022
DOIs
Publication statusPublished - 25 May 2022

Bibliographical note

This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike licence
(https://creativecommons.org/licenses/by-nc-sa/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the same Creative Commons licence is included and the original work is properly cited. The written permission of Cambridge University Downloaded from Press must be obtained for commercial re-use.

Funder

This research was supported by the National Science Foundation (J.A., EAR 1620649; EAR 1853196); and the Engineering and Physical Sciences Research Council (S.H., EP/V047388/1)

Keywords

  • Bénard convection
  • magneto convection
  • rotating flows

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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