Abstract
We investigate the computation of the Lagrangian second-order structure-function for describing the multiscale dynamics of turbulence based on measured particle trajectory data. Using time-resolved three-dimensional particle tracking velocimetry (4D-PTV), we statistically quantified turbulent properties of the anisotropic and inhomogeneous flow field behind a cylinder at a Reynolds number of 39 00. Lagrangian statistical analysis has been performed on nearly 12000 trajectories for 4000 time steps.
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