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SUMMARY:Application of statistical mechanics to the modeling of potential 
 vorticity or density mixing - Sommeria\, J (LEGI-CNRS)
DTSTART:20081211T163000Z
DTEND:20081211T170000Z
UID:TALK15635@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION: Statistical mechanics of vortex patches can provide models fo
 r potential vorticity mixing with the constraints of fluid incompressibili
 ty and energy conservation. This leads to the self-organisation of turbule
 nce into large coherent structures.\n\nWe can apply a similar approach to 
 the vertical mixing of fluid elements with different densities. This leads
  to a model of vertical mixing which involves the competition of an eddy d
 iffusivity with sedimentation of fluid elements. In addition to these two 
 processes\, the straining of fluid elements by eddies must be included. Th
 e behaviour of the resulting model will be discussed for different cases o
 f vertical mixing in a stratified fluid. 
LOCATION:Seminar Room 1\, Newton Institute
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