The European Physical Journal B - Condensed Matter and Complex Systems

, Volume 33, Issue 4, pp 469–485

Numerical study of homogeneous dynamo based on experimental von Kármán type flows

DOI: 10.1140/epjb/e2003-00187-2

Cite this article as:
Marié, L., Burguete, J., Daviaud, F. et al. Eur. Phys. J. B (2003) 33: 469. doi:10.1140/epjb/e2003-00187-2

Abstract.

A numerical study of the magnetic induction equation has been performed on von Kármán type flows. These flows are generated by two co-axial counter-rotating propellers in cylindrical containers. Such devices are currently used in the von Kármán sodium (VKS) experiment designed to study dynamo action in an unconstrained flow. The mean velocity fields have been measured for different configurations and are introduced in a periodic cylindrical kinematic dynamo code. Depending on the driving configuration, on the poloidal to toroidal flow ratio and on the conductivity of boundaries, some flows are observed to sustain growing magnetic fields for magnetic Reynolds numbers accessible to a sodium experiment. The response of the flow to an external magnetic field has also been studied: The results are in excellent agreement with experimental results in the single propeller case but can differ in the two propellers case.

PACS.

47.65.+a Magnetohydrodynamics and electrohydrodynamics 91.25.Cw Origins and models of the magnetic field; dynamo theories

Copyright information

© EDP Sciences, Springer-Verlag 2003

Authors and Affiliations

  • L. Marié
    • 1
  • J. Burguete
    • 1
    • 2
  • F. Daviaud
    • 1
  • J. Léorat
    • 3
  1. 1.Service de Physique l'État Condensé CEA/SaclayGif-sur-YvetteFrance
  2. 2.Departamento de Fısica y Matemática Aplicada Universidad de NavarraPamplonaSpain
  3. 3.LUTH Observatoire de Paris-Meudon MeudonFrance