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SUMMARY:Two-dimensional turbulence inside a strong vortex - Falkovich\, G 
 (Weizmann Institute of Science)
DTSTART:20081209T113000Z
DTEND:20081209T120000Z
UID:TALK15629@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:I will present experimental results on turbulence generated in
  thin fluid layers in the presence of a large-scale coherent flow\, or a s
 pectral condensate. It will be shown that the condensate modifies the thir
 d-order velocity moment in a much wider interval of scales than the second
  one. The modification may include the change of sign of the third moment 
 in the inverse cascade. This observation may help resolve a controversy on
  the energy flux in meso-scale atmospheric turbulence (10-500 km): to reco
 ver a correct energy flux from the third velocity moment one needs first t
 o subtract the coherent flow. We find that the condensate also increases t
 he velocity flatness. I will briefly present a theoretical consideration f
 or condensate-turbulence interaction.
LOCATION:Seminar Room 1\, Newton Institute
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