The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields

Details The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields

2009-06-15

arxiv.org/abs/0906.2751v1

Phys. Rev. Lett. 104, 024503 (2010)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.104.024503

We re-examine the nature of the turbulent magnetic diffusivity tensor of mean field electrodynamics and show that an inconsistency arises if it is calculated via consideration of time-independent magnetic fields. Specifically, the predicted growth rate of the mean magnetic field is, in general, incorrect. We describe how the traditional expansion procedure for the mean electromotive force should be extended, and illustrate the consistency of this approach by means of a perturbation analysis for a mean magnetic field varying on long spatial scales. Finally we examine the magnitude of this new contribution to the magnetic diffusion for a particular flow.

Affiliated with

Also associated with

No associations

Rating

The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Turbulent Magnetic Diffusivity Tensor for Time-Dependent Mean Fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-316742