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New dynamical mean field dynamo theory and closure approach View all abstracts by submitter

Eric Blackman   Submitted: 2003-07-11 18:28

We develop a new nonlinear mean field dynamo theory that couples field growth to the time evolution of the magnetic helicity and the turbulent electromotive force, Emf. We show that the difference between kinetic and current helicities emerges naturally as the growth driver when the time derivative of Emf is coupled into the theory. The solutions predict significant field growth in a kinematic phase and a saturation rate/strength that is magnetic Reynolds number dependent/independent in agreement with numerical simulations. The amplitude of early time oscillations provides a diagnostic for the closure.

Authors: Eric G. Blackman (Univ. of Rochester) , George B. Field (CFA)
Projects: None

Publication Status: Published in Physical Review Letters 89, 265007 (2002)
Last Modified: 2003-07-11 18:28
Go to main E-Print page  Short Period Fast Waves in Solar Coronal Loops  Relaxation of writhe and twist of a bi-helical magnetic field  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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