The effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona

Details The effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona The effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..219s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, March 1989, p. 219-222.

Physics

7

Heat Transfer, Magnetohydrodynamic Stability, Solar Corona, Solar Magnetic Field, Magnetic Field Configurations, Plasma Diffusion, Pressure Gradients

Scientific paper

Presently favored mechanisms of coronal heating (current sheet dissipation and Alfven wave resonant heating) deposit heat in thin layers. Classical thermal conduction cannot explain how heat is transported across the magnetic field. If heating occurs in thin layers, large pressure gradients can be created which can give rise to ballooning modes. These instabilities are caused by the pressure gradient and the curvature of the magnetic field, and are stabilized by magnetic tension. The modes are broad band in wavelength and should produce turbulence. A mixing length expression for the turbulent heat transport shows that it is more than adequate to rapidly convect heat into much broader layers. Furthermore, the turbulent resistivity implies that heating occurs over most of the width of these broadened layers. The broadening also implies that much shorter time scales are required for heating. The beta values in the corona suggest that 1-10 turbulent layers are formed in typical loop or arch structures.

Affiliated with

Also associated with

No associations

Rating

The effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona 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 effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of ballooning modes on thermal transport and magnetic field diffusion in the solar corona will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1803614