Magnetic field generation in Kolmogorov turbulence

Details Magnetic field generation in Kolmogorov turbulence Magnetic field generation in Kolmogorov turbulence

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..733..137b&link_type=abstract

MHD COUETTE FLOWS: Experiments and Models. AIP Conference Proceedings, Volume 733, pp. 137-141 (2004).

Physics

Turbulent Flows

Scientific paper

We analyze the initial, kinematic stage of magnetic field evolution in an isotropic and homogeneous turbulent conducting fluid with a ``rough'' velocity field, v(l) ~ lα, α < 1. This regime is relevant to the problem of magnetic field generation in turbulent fluids with small magnetic Prandtl number, i.e. with ohmic resistivity much larger than viscosity. Our interest in motivated by the following question: suppose that smooth fluctuations of velocity field are able to amplify a weak magnetic field, would the magnetic field be still amplified if the fluid motion becomes strongly turbulent, i.e. non-smooth? Quite paradoxically, turbulence can be dangerous for magnetic field generation. We propose that the smaller the magnetic Prandtl number, the larger the magnetic Reynolds number that is needed to excite magnetic fluctuations. This implies that numerical or experimental investigations of magnetohydrodynamical turbulence with small Prandtl numbers need to achieve extremely high resolution in order to describe magnetic phenomena adequately.

Affiliated with

Also associated with

No associations

Rating

Magnetic field generation in Kolmogorov turbulence 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 Magnetic field generation in Kolmogorov turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic field generation in Kolmogorov turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1008646