Experimental demonstration of a homogeneous two-scale dynamo
Abstract
It has been shown theoretically that homogeneous kinematic dynamo action is possible for many unconfined and confined velocity fields, but a rigorous experimental validation is still lacking. G. O. Roberts [Philos. Trans. R. Soc. London, Ser. A 266, 535 (1970)] proposed a spatially periodic velocity field capable to generate a dynamo, which Busse [Geophys. J. R. Astron. Soc. 42, 437 (1975)] modified by introducing a second length scale larger in order to obtain a solution for a finite domain. Based on a scale separation approach Busse [Springer Proceedings in Physics, Vol. 69 (Springer Verlag, New York, 1992)] proposed a conceptual design for an experimental homogeneous dynamo. An engineering design was developed and a test facility has been set up. This test facility is described and first experimental results confirming dynamo action are presented.
- Publication:
-
Physics of Fluids
- Pub Date:
- March 2001
- DOI:
- 10.1063/1.1331315
- Bibcode:
- 2001PhFl...13..561S
- Keywords:
-
- 47.65.+a;
- 47.32.Cc