Basic flow and its three-dimensional linear stability in a small spherical droplet spinning in an alternating magnetic field

Victor Shatrov, Janis Priede, Gunter Gerbeth

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We present a numerical analysis of the liquid metal flow and its three-dimensional linear stability in a spherical droplet spinning in an alternating magnetic field. The applied magnetic field is uniform and the droplet spins around an axis parallel to the field. The droplet is assumed to be small so that its deformation by both electromagnetic and centrifugal forces is negligible. We find that a sufficiently fast spinning suppresses and stabilizes the internal flow in the droplet. However, there is a narrow range of rotation rates corresponding to an Ekman number of E ≈ 10-2, where the spinning can destabilize the internal flow. Our results can be useful for the assessment of melt flow conditions in certain material processing technologies using electromagnetic levitation melting techniques.

Original languageEnglish
Article number078106
JournalPhysics of Fluids
Volume19
Issue number7
DOIs
Publication statusPublished - Jul 2007

Keywords

  • Fluid drops
  • Magnetic fields
  • Alternating current power transmission
  • Rotating flows
  • Reynolds stress modelling

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Condensed Matter Physics

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