Kinematic α Tensors and Dynamo Mechanisms in a von Kármán Swirling Flow

F. Ravelet, B. Dubrulle, F. Daviaud, and P.-A. Ratié
Phys. Rev. Lett. 109, 024503 – Published 12 July 2012

Abstract

We provide experimental and numerical evidence of in-blades vortices in the von Kármán swirling flow. We estimate the associated kinematic α-effect tensor and show that it is compatible with recent models of the von Kármán sodium (VKS) dynamo. We further show that depending on the relative frequency of the two impellers, the dominant dynamo mechanism may switch from α2 to αΩ dynamo. We discuss some implications of these results for VKS experiments.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 18 January 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.024503

© 2012 American Physical Society

Authors & Affiliations

F. Ravelet1, B. Dubrulle2, F. Daviaud2, and P.-A. Ratié1

  • 1Arts et Metiers ParisTech, DynFluid, 151 boulevard de l’Hôpital, 75013 Paris, France
  • 2CEA, IRAMIS, SPEC, CNRS URA 2464, SPHYNX, 91191 Gif-sur-Yvette, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 109, Iss. 2 — 13 July 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×