title: Kinematic dynamos surrounded by a stationary conductor.
abstract: We investigate kinematic dynamos in cylinders and spheres surrounded by an insulator. The flow volume is divided into an inner region, in which the conducting fluid is in motion, and an outer region enclosing the inner one, in which the conductor is at rest. The dependence of the critical magnetic Reynolds number on the thickness of the outer conducting shell is discussed as well as implications for the design of experimental dynamos.
authors.affiliation: Department of Mathematics and Physics, University of Bayreuth, D-95440 Bayreuth, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Kaiser
authors.forename: A
authors.initials: A
authors.lastname: Tilgner