Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-20T08:38:08.355Z Has data issue: false hasContentIssue false
  • English
  • Français

Experiments at a two-scale dynamo test facility

Published online by Cambridge University Press:  29 March 2006

U. MÜLLER ,
R. STIEGLITZ  and
S. HORANYI
U. MÜLLER
Affiliation:
Forschungszentrum Karlsruhe GmbH, Postfach 3640, Universität Karlsruhe, 76021 karlsruhe, Germany
R. STIEGLITZ
Affiliation:
Forschungszentrum Karlsruhe GmbH, Postfach 3640, Universität Karlsruhe, 76021 karlsruhe, Germany
S. HORANYI
Affiliation:
Atomic Energy Research Institute, Budapest
Get access Rights & Permissions [Opens in a new window]

Abstract

A report of experimental results on dynamo action is presented, obtained at the Karlsruhe dynamo test facility. Former observations concerning the properties of the dynamo magnetic field are corroborated and complemented. The feedback of the dynamo magnetic field on the sodium velocity in the test module is analysed based on measurements employing permanent magnet potential sensors. The evaluation of time signals recorded by these probes shows that a growing dynamo magnetic field transforms hydrodynamic turbulent velocity profiles in channels into magnetohydrodynamic slug flow profiles, indicating a balance between pressure and Lorentz forces. Cross-correlations between time signals of the magnetic induction and the local velocity reveal a significant coherency between apparently random fluctuations of these relevant dynamo quantities.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 552 , 10 April 2006 , pp. 419 - 440
Copyright
© 2006 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)