Unsteady dynamo effects at large magnetic reynolds number

Bruce J Bayly, S. Childress

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

In this paper we show that the adjoint formulation of the Stretch-Fold-Shear (SFS) fast dynamo model has smooth eigenfunctions at zero diffusivity. We thus compute fast dynamo action with smooth fields. We note that the adjoint problem is equivalent to use of a vector potential in reversed flow. We compare this behavior with analogous results for general pulsed-flow models. Some calculations using pulsed Beltrami waves are described.

Original languageEnglish (US)
Pages (from-to)23-43
Number of pages21
JournalGeophysical and Astrophysical Fluid Dynamics
Volume49
Issue number1-4
DOIs
StatePublished - 1989
Externally publishedYes

Keywords

  • Beltrami flows
  • Fast dynamos

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Computational Mechanics
  • Astronomy and Astrophysics
  • Mechanics of Materials

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