MHD turbulence in a channel with spanwise magnetic field

Details MHD turbulence in a channel with spanwise magnetic field MHD turbulence in a channel with spanwise magnetic field

2008-09-05

arxiv.org/abs/0809.0964v1

Phys. Fluids, 20 (2008) 095105

Physics

Fluid Dynamics

27 pages, 14 Postscript figures, to appear in Phys. Fluids

Scientific paper

10.1063/1.2975988

The effect of a uniform spanwise magnetic field on a turbulent channel flow is investigated for the case of low magnetic Reynolds number. DNS and LES computations are performed for two values of the hydrodynamic Reynolds number (10^4 and 2\times 10^4) and the Hartmann number varying in a wide range. It is shown that the main effect of the magnetic field is the suppression of turbulent velocity fluctuations and momentum transfer in the wall-normal direction. This leads to drag reduction and transformation of the mean flow profile. The centerline velocity grows, the mean velocity gradients near the wall decrease, and the typical horizontal dimensions of the coherent structures enlarge upon increasing the Hartmann number. Comparison between LES and DNS results shows that the dynamic Smagorinsky model accurately reproduces the flow transformation.

Affiliated with

Also associated with

No associations

Rating

MHD turbulence in a channel with spanwise magnetic field 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 MHD turbulence in a channel with spanwise magnetic field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MHD turbulence in a channel with spanwise magnetic field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-658756