## ApJ, in press Brandenberg, A

- A. Bhattacharjee, Y. Yuan
- Phys. Rev. E.,
- 1995

2 Excerpts

- Published 2000

We show, with direct numerical simulation of three-dimensional magnetohydrodynamic turbulence with a mean magnetic field, B, that the time behavior of the dynamo α-effect is constrained by the dynamics of magnetic helicity. A time-scale tc is introduced such that for t < tc, the α-coefficient calculated from the simulation is close to the result given by Field et al (1999), αFBC ∼ − τc 3 (〈v · ∇ × v〉 − 〈b · ∇ × b〉); for t > tc, the α-coefficient can be approximated by αFBC/ (

@inproceedings{Chou2000ConservationOM,
title={Conservation of Magnetic Helicity and Its Constraint on α-Effect of Dynamo Theory},
author={Hongsong Chou},
year={2000}
}