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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.97: Poster

Thursday, March 30, 2006, 16:00–18:00, P1

Statistical properties of Lagrangian particles in vortical structures — •M. Wilczek and R. Friedrich — Institut für Theoretische Physik, Wilhelm-Klemm-Str. 10, 48149 Münster

It is well known that turbulent velocity fields contain coherent structures. A common assumption is that intermittency in the velocity signal is caused by these structures.

Therefore it is interesting to examine the evolution of a single Lagrangian particle in a random sequence of coherent vortices. For the special case of a sequence of Burgers vortices we obtain statistical properties, e.g. probability density functions for the velocity increments.