Lagrangian statistics in fully developed turbulence

Details Lagrangian statistics in fully developed turbulence Lagrangian statistics in fully developed turbulence

2004-02-19

arxiv.org/abs/nlin/0402032v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 5 figures

Scientific paper

The statistical properties of fluid particles transported by a fully developed turbulent flow are investigated by means of high resolution direct numerical simulations. Single trajectory statistics is investigated in a time range spanning more than three decades, from less than a tenth of the Kolmogorov timescale up to one large-eddy turnover time. Acceleration and velocity statistics show a neat quantitative agreement with recent experimental results. Trapping effects in vortex filaments give rise to enhanced small-scale intermittency on Lagrangian observables.

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