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Dynamo action produced by an anisotropic rotor immersed in an electrically conducting medium at rest

Franck Plunian*

Thierry Alboussière†

  • Université Grenoble Alpes, Université Savoie Mont Blanc, Centre National de la Recherche Scientifique, IRD, Université Gustave Eiffel, ISTerre, Grenoble 38000, France

  • Université Lyon 1, ENS de Lyon, Centre National de la Recherche Scientifique, Laboratoire de Géologie de Lyon, Lyon 69622, France

  • *franck.plunian@univ-grenoble-alpes.fr
  • †thierry.alboussiere@ens-lyon.fr
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Phys. Rev. Fluids 8, 113702 – Published 17 November, 2023

DOI: https://doi.org/10.1103/PhysRevFluids.8.113702

Abstract

It is shown that the rotational motion of a cylindrical rotor immersed in an electroconducting medium at rest can produce a dynamo effect, provided that the electrical conductivity or magnetic permeability of the rotor is anisotropic. Results are reported for three pairs of rotor materials: copper/kapton, iron/tin, and μ-metal/tin. The value of using such an anisotropic rotor in liquid metal such as sodium or galinstan for a laboratory dynamo experiment is clearly demonstrated.

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Phys. Rev. Fluids 8, 113702– Published 17 November, 2023
  • Received 28 April 2023
  • Accepted 18 October 2023
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