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SUMMARY:Decaying two-dimensional turbulence undergoes statistical heating 
 - Professor Gavin Esler\, UCL
DTSTART:20191108T130000Z
DTEND:20191108T140000Z
UID:TALK132376@talks.cam.ac.uk
CONTACT:Connor O'Pray
DESCRIPTION:An emergent property of decaying two-dimensional turbulence is
  shown to be a weak but persistent statistical heating\, or tendency towar
 ds clustering of like-signed vortices. The rate of this heating\, which is
  driven by changes to the vortex population due to vortex mergers and stra
 ining events\, provides a strong constraint on both vortex decay laws and 
 kinetic theories of vortex interactions. A quasi-equilibrium statistical t
 heory determines the energy spectrum from just the vortex interaction ener
 gy and bulk information about the number density of the vortices. The emer
 gent heating rate is shown to determine the upscale transfer of energy\, a
 nd is a powerful constraint on power law descriptions of the evolving vort
 ex population
LOCATION:LR5\, Baker Building\, CUED.
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