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SUMMARY:Diffusion and mixing in incompressible flows - Michele Coti-Zelati
 \, Imperial College London
DTSTART:20181112T150000Z
DTEND:20181112T160000Z
UID:TALK112216@talks.cam.ac.uk
CONTACT:Ivan Moyano
DESCRIPTION:We study diffusion and mixing in different fluid dynamics mode
 ls\, mainly related to incompressible flows. In this setting\, mixing is a
  purely advective effect which causes a transfer of energy to high frequen
 cy. In turn\, mixing acts to enhance the dissipative forces\, giving rise 
 to what we refer to as enhanced dissipation: this can be understood by the
  identification of a time-scale faster than the purely diffusive one. We w
 ill give a general overview on the subject\, and present a few specific ap
 plications that include passive scalar evolution in both planar and radial
  settings\, fractional diffusion\, linearized two-dimensional Navier-Stoke
 s equations\, and even simple examples in kinetic theory.
LOCATION:CMS\, MR13
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