Berlin 2005 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 34: Poster

DY 34.67: Poster

Montag, 7. März 2005, 15:30–18:00, Poster TU D

Lagrangian particle statistics in two dimensional turbulence — •Susanne Zeglin and Rudolf Friedrich — Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Str. 9, 48149 Münster

Based on a numerical solution of the forced Navier-Stokes equation we present results on the statistics of Lagrangian particles for two dimensional turbulence. Special emphasis is placed on the properties of particle acceleration. We show that the probabiliy distribution of the particle acceleration can be well approximated by streched exponentials. A comparison with the results on the basis of a point vortex model for twodimensional turbulence is made.