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Experimental realization of dynamo action: present status and prospects

Published online by Cambridge University Press:  18 July 2013

André Giesecke ,
Frank Stefani ,
Thomas Gundrum ,
Gunter Gerbeth ,
Caroline Nore  and
Jacques Léorat
André Giesecke
Affiliation:
Helmholtz-Zentrum Dresden-RossendorfP.O.B. 510119, D-01314, Dresden, Germany email: a.giesecke@hzdr.de
Frank Stefani
Affiliation:
Helmholtz-Zentrum Dresden-RossendorfP.O.B. 510119, D-01314, Dresden, Germany email: a.giesecke@hzdr.de
Thomas Gundrum
Affiliation:
Helmholtz-Zentrum Dresden-RossendorfP.O.B. 510119, D-01314, Dresden, Germany email: a.giesecke@hzdr.de
Gunter Gerbeth
Affiliation:
Helmholtz-Zentrum Dresden-RossendorfP.O.B. 510119, D-01314, Dresden, Germany email: a.giesecke@hzdr.de
Caroline Nore
Affiliation:
Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur (LIMSI), CNRS, BP 133, F-91403 Orsay cedex, France email: nore@limsi.fr
Jacques Léorat
Affiliation:
Observatoire de Paris-Meudon, place Janssen, F-92195 Meudon, France email: jacques.leorat@obspm.fr
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Abstract

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In the last decades, the experimental study of dynamo action has made great progress. However, after the dynamo experiments in Karlsruhe and Riga, the von-Kármán-Sodium (VKS) dynamo is only the third facility that has been able to demonstrate fluid flow driven self-generation of magnetic fields in a laboratory experiment. Further progress in the experimental examination of dynamo action is expected from the planned precession driven dynamo experiment that will be designed in the framework of the liquid sodium facility DRESDYN (DREsden Sodium facility for DYNamo and thermohydraulic studies).

In this paper, we briefly present numerical models of the VKS dynamo that demonstrate the close relation between the axisymmetric field observed in that experiment and the soft iron material used for the flow driving impellers. We further show recent results of preparatory water experiments and design studies related to the precession dynamo and delineate the scientific prospects for the final set-up.

Keywords

magnetic fieldsmethods: laboratorymethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 411 - 416
Copyright
Copyright © International Astronomical Union 2013 

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