Influence of electro-magnetic boundary conditions onto the onset of dynamo action in laboratory experiments.

Raul Avalos-Zuniga (1) , Franck Plunian (1, 2) , Agris Gailitis

1 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
2 LGIT - Laboratoire de Géophysique Interne et Tectonophysique

We study the onset of dynamo action of the Riga and Karlsruhe experiments with the addition of an external wall, the electro-magnetic properties of which being different from those of the fluid in motion. We consider a wall of different thickness, conductivity and permeability. We also consider the case of a ferro-fluid in motion.

Domaines: Géophysique [physics.geo-ph]; Géophysique [physics.geo-ph]

Raul Avalos-Zuniga, Franck Plunian, Agris Gailitis. Influence of electro-magnetic boundary conditions onto the onset of dynamo action in laboratory experiments.. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2003, 68, pp.066307. ⟨10.1103/PhysRevE.68.066307⟩. ⟨hal-00107514⟩