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SUMMARY:Dynamics of inertial particles in fully developed turbulence - Pin
 ton\, JF (ENS-Lyon)
DTSTART:20081002T133000Z
DTEND:20081002T140000Z
UID:TALK13865@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:We focus on acceleration of inertial particles\, using experim
 atal measurements and numerical studies.  In the  experiment\, particles a
 re optically tracked in a turbulent flow of water using an Extended Laser
  Doppler Velocimetry technique. The probability density functions (PDF) of
  particle accelerations and their auto-correlation in time are computed. N
 umerical results are obtained from a direct numerical simulation in which 
 a suspension of passive pointwise particles is tracked\, with the same fi
 nite density and the same response time as in the experiment. We observe t
 hat many effects cannot be accounted for by point-particle models. We show
  that a much better description is achieved when one includes Faxen correc
 tions in the particle's equation of evolution. 
LOCATION:Seminar Room 1\, Newton Institute
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