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 is an element of [120740]. 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.

Arneodo, A., Benzi, R., Berg, J., Biferale, L., Bodenschatz, E., Busse, A., et al. (2008). Universal intermittent properties of particle trajectories in highly turbulent flows. PHYSICAL REVIEW LETTERS, 100(25) [10.1103/PhysRevLett.100.254504].

Universal intermittent properties of particle trajectories in highly turbulent flows

BENZI, ROBERTO;BIFERALE, LUCA;
2008-01-01

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 is an element of [120740]. 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.
2008
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Con Impact Factor ISI
Computer simulation; Describing functions; Lagrange multipliers; Reynolds number; Sedimentation; Statistical methods; Statistics; Trajectories; Turbulence; (PL) properties; American Physical Society (APS); Collapse (drying); Data sets; Intermittency; Lagrangian; Multifractal theory; Numerical simulations; Particle trajectories; Reynolds (CO); statistical convergence; Structure functions; temporal scaling; Time lags; Turbulent velocity; universal behaviors; Velocity statistics; Wide-range; Set theory
Arneodo, A., Benzi, R., Berg, J., Biferale, L., Bodenschatz, E., Busse, A., et al. (2008). Universal intermittent properties of particle trajectories in highly turbulent flows. PHYSICAL REVIEW LETTERS, 100(25) [10.1103/PhysRevLett.100.254504].
Arneodo, A; Benzi, R; Berg, J; Biferale, L; Bodenschatz, E; Busse, A; Calzavarini, E; Castaing, B; Cencini, M; Chevillard, L; Fisher, R; Grauer, R; Homann, H; Lamb, D; Lanotte, A; Leveque, E; Luthi, B; Mann, J; Mordant, N; Muller, W; Ott, S; Ouellette, N; Pinton, J; Pope, S; Roux, S; Toschi, F; Xu, H; Yeung, P
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/29821
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