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CATEGORIES:Engineering Fluids Group Seminar
SUMMARY:Decaying two-dimensional turbulence undergoes stat
 istical heating - Professor Gavin Esler\, UCL
DTSTART;TZID=Europe/London:20191108T130000
DTEND;TZID=Europe/London:20191108T140000
UID:TALK132376AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/132376
DESCRIPTION:An emergent property of decaying two-dimensional t
 urbulence is shown to be a weak but persistent sta
 tistical heating\, or tendency towards clustering 
 of like-signed vortices. The rate of this heating\
 , which is driven by changes to the vortex populat
 ion due to vortex mergers and straining events\, p
 rovides a strong constraint on both vortex decay l
 aws and kinetic theories of vortex interactions. A
  quasi-equilibrium statistical theory determines t
 he energy spectrum from just the vortex interactio
 n energy and bulk information about the number den
 sity of the vortices. The emergent heating rate is
  shown to determine the upscale transfer of energy
 \, and is a powerful constraint on power law descr
 iptions of the evolving vortex population
LOCATION:LR5\, Baker Building\, CUED.
CONTACT:Connor O'Pray
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