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SUMMARY:Experimental results on the dynamics of tracers and inertial parti
 cles in highly turbulent flows - Bodenschatz\, E (MPIDS)
DTSTART:20081002T083000Z
DTEND:20081002T090000Z
UID:TALK13864@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We report measurements on the statistics of two particle dispe
 rsion\, acceleration\, and velocity structure functions for tracers and in
 ertial particles. We will especially discuss large\, neutrally buoyant and
  small\, heavy particles. The experiments are conducted in the center of v
 on Karmann mixing flows at high Reynolds numbers using direct Lagrangian p
 article tracking.  We will show that single time\, single particle statist
 ics are not sensitive to particle inertial for both particles\; however\, 
 we observed an inertial effect on the two-time\, or the two-particle stati
 stics. We will also show that the preferential concentration (increase of 
 the radial distribution function) measured in the center of the apparatus 
 is caused by a decrease of the average particle number density as a functi
 on of the distance from the center of the apparatus\, which is the statist
 ical stationary point of the flow field.\nThe work has been conducted with
  Mathieu Gibert and Haitao Xu.
LOCATION:Seminar Room 1\, Newton Institute
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