Universal intermittent properties of particle trajectories in highly turbulent flows
Date
2008-06
Authors
Arneodo, A.
Benzi, R.
Berg, J.
Biferale, L.
Bodenschatz, E.
Busse, A.
Calzavarini, E.
Castaing, B.
Cencini, M.
Chevillard, L.
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Abstract
We present a collection of eight data sets from state-of-the-art experiments and
numerical simulations on turbulent velocity statistics along particle trajectories
obtained in different flows with Reynolds numbers in the range R{lambda}in[120:740].
Lagrangian structure functions from all data sets are found to collapse onto each other
on a wide range of time lags, pointing towards the existence of a universal behavior,
within present statistical convergence, and calling for a unified theoretical
description. Parisi-Frisch multifractal theory, suitably extended to the dissipative
scales and to the Lagrangian domain, is found to capture the intermittency of velocity
statistics over the whole three decades of temporal scales investigated here.
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Citation
Arneodo, A., R. Benzi, J. Berg, L. Biferale, et al. 2008. "Universal intermittent properties of particle trajectories in highly turbulent
flows." Physical Review Letters 100(25): 254504. doi:10.1103/PhysRevLett.100.254504