Pumping velocity in homogeneous helical turbulence with shear

Details Pumping velocity in homogeneous helical turbulence with shear Pumping velocity in homogeneous helical turbulence with shear

2011-05-29

arxiv.org/abs/1105.5785v2

Phys. Rev. E 84, 056314 (2011)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

12 pages, 9 figures, REVTEX4-1, revised version

Scientific paper

10.1103/PhysRevE.84.056314

Using different analytical methods (the quasi-linear approach, the path-integral technique and tau-relaxation approximation) we develop a comprehensive mean-field theory for a pumping effect of the mean magnetic field in homogeneous non-rotating helical turbulence with imposed large-scale shear. The effective pumping velocity is proportional to the product of alpha effect and large-scale vorticity associated with the shear, and causes a separation of the toroidal and poloidal components of the mean magnetic field along the direction of the mean vorticity. We also perform direct numerical simulations of sheared turbulence in different ranges of hydrodynamic and magnetic Reynolds numbers and use a kinematic test-field method to determine the effective pumping velocity. The results of the numerical simulations are in agreement with the theoretical predictions.

Affiliated with

Also associated with

No associations

Rating

Pumping velocity in homogeneous helical turbulence with shear 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 Pumping velocity in homogeneous helical turbulence with shear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pumping velocity in homogeneous helical turbulence with shear will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-289752