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SUMMARY:3D measurements of fine scale features in turbulence: a quest for 
 universality - John Lawson\, CUED
DTSTART:20140613T120000Z
DTEND:20140613T130000Z
UID:TALK51287@talks.cam.ac.uk
CONTACT:Aleksandra Przydrozna
DESCRIPTION:Turbulence is everywhere. Its length and timescales can range 
 from the very large to the very small. It is strongly dissipative and diff
 usive\, meaning that it is very effective at converting kinetic energy to 
 heat and strongly enhances the transport and mixing of momentum\, heat\, c
 hemicals and more. The smallest lengthscales of the motion are responsible
  for this dissipation and mixing\, but making direct measurements can be v
 ery difficult owing to their small size and short timescales. We have impr
 oved upon a velocimetry technique that allows us to make accurate and spat
 ially resolved measurements of the fine scales in three dimensions. This g
 ives experimentalists a new ability to answer questions about the supposed
  universal behaviours of such motions that used to be confined to the land
  of direct numerical simulations.  In this talk\, I shall introduce the fu
 ndamentals of this technique and present some preliminary findings from a 
 laboratory investigation of homogeneous\, axisymmetric turbulence. 
LOCATION:LR3B\, Inglis Building\, CUED 
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