TY - JOUR A1 - Donner, Reik Volker A1 - Feudel, Fred A1 - Seehafer, Norbert A1 - Sanjuan, Miguel Angel Fernandez T1 - Hierarchical modeling of a forced Roberts Dynamo N2 - We investigate the dynamo effect in a flow configuration introduced by G. O. Roberts in 1972. Based on a clear energetic hierarchy of Fourier components on the steady-state dynamo branch, an approximate model of interacting modes is constructed covering all essential features of the complete system but allowing simulations with a minimum amount of computation time. We use this model to study the excitation mechanism of the dynamo, the transition from stationary to time-dependent dynamo solutions and the characteristic properties of the latter ones. Y1 - 2007 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/30600 UR - http://www.worldscinet.com/ijbc/ijbc.shtml SN - 0218-1274 ER -