Article

Linear and nonlinear dynamo action

Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, CO 80309-0440, USA; Astronomy and Astrophysics Centre, University of Chicago, Chicago, IL 60637, USA; Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, CO 80309-0440, USA
Physics Letters A DOI:10.1016/S0375-9601(98)00760-9 pp.437-442

ABSTRACT We discuss a nonlinear forced magnetohydrodynamic dynamo simulation that exhibits a surprising range of behavior, including multiple hydrodynamic states with different dynamo properties. Magnetic fields may decay after initial kinematic amplification. This behavior emphasizes that initial conditions must be taken into account when classifying nonlinear dynamos.

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Keywords

initial kinematic amplification
 
Magnetic fields
 
magnetohydrodynamic dynamo simulation
 
multiple hydrodynamic states
 

Nicholas H. Brummell