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SUMMARY:The Best of TIMES?  Turbulence\, Instability\, Mixing and Exact St
 ates in Stratified Shear Flows - Professor Colm C Caulfield\, BP Institute
DTSTART:20180118T113000Z
DTEND:20180118T123000Z
UID:TALK97585@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Stratified shear flows\, where the `background' velocity and d
 ensity distribution vary over some characteristic length scales\, are ubiq
 uitous in the atmosphere and the ocean. At sufficiently high Reynolds numb
 er\, such flows are commonly believed to play a key role in the transition
  to turbulence\, and hence to be central to irreversible mixing of the den
 sity field. Parameterizations of such irreversible mixing within larger sc
 ale models of the ocean in particular is a major area of uncertainty\, not
  least because there is a wide range of  highly scattered and apparently i
 nconsistent experimental and observational data.  Here\, I review some of 
 the recent progress using modern mathematical techniques  in developing un
 derstanding of instability\, transition\, turbulence and mixing in stratif
 ied shear flows\, I  focus in particular on the crucial role of so-called 
 `exact coherent states'\, i.e. unstable solutions of the underlying govern
 ing equations which nevertheless appear to play the role of an underlying 
 organising `skeleton' for  turbulent flow dynamics in stratified shear flo
 ws. \n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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