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SUMMARY:Structure formation in magnetised plasmas - Gunnar Hornig (Univers
 ity of Dundee)
DTSTART:20170922T135000Z
DTEND:20170922T143000Z
UID:TALK80691@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Magnetic fields in high temperature plasmas have a tendency to
  take on the structure of Beltrami fields\, also known as force-free field
 s. These fields play also an important role in vortex dynamics as they for
 m stationary solutions of the Euler equation. While it is comparatively ea
 sy to show that the class of Beltrami fields are minimum energy states und
 er certain constraints\, it is much harder to predict to which particular 
 force-free state a given magnetic field will relax to. We review what is k
 nown about the various routes of relaxation and present some newer results
  of simulations which show that the dynamics depends strongly on the exist
 ence of turbulence during the relaxation process and the environment in wh
 ich this turbulent plasma is embedded.
LOCATION:Seminar Room 1\, Newton Institute
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