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Thursday 02 October 2008, 14:30-15:00
Dynamics of inertial particles in fully developed turbulence
- π€ Speaker: Pinton, JF (ENS-Lyon)
- π Date & Time: Thursday 02 October 2008, 14:30 - 15:00
- π Venue: Seminar Room 1, Newton Institute
Abstract
We focus on acceleration of inertial particles, using experimatal measurements and numerical studies. In the experiment, particles are optically tracked in a turbulent ο¬ow 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. Numerical results are obtained from a direct numerical simulation in which a suspension of passive pointwise particles is tracked, with the same ο¬nite density and the same response time as in the experiment. We observe that many effects cannot be accounted for by point-particle models. We show that a much better description is achieved when one includes Faxen corrections in the particle’s equation of evolution.
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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