Particle trapping in three-dimensional fully developed turbulence

Creators: Biferale, L.; Boffetta, Guido; Celani, Antonio; Lanotte, Alessandra; Toschi, Federico

Others:: Dipartimento di Fisica (INFN) ; Università degli Studi di Roma Tor Vergata [Roma]; Dipartimento di Fisica Generale [Torino] ; Università degli studi di Torino = University of Turin (UNITO); Institut Non Linéaire de Nice Sophia-Antipolis (INLN) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS); Istituto di Scienze dell'Atmosfera e del Clima [Lecce] (ISAC) ; Consiglio Nazionale delle Ricerche [Roma] (CNR); Istituto per le Applicazioni del Calcolo "Mauro Picone" (IAC) ; Consiglio Nazionale delle Ricerche [Roma] (CNR)

Description

he statistical properties of fluid particles transported by a three-dimensional fully developed turbulent flow are investigated by means of high resolution direct numerical simulations. Single trajectory statistics are investigated in a time range spanning more than three decades, from less than a tenth of the Kolmogorov time scale, , up to one large-eddy turnover time. Our analysis reveals the existence of relatively rare trapping events in vortex filaments which give rise to enhanced intermittency on Lagrangian observables up to 10. Lagrangian velocity structure function attain scaling properties in agreement with the multifractal prediction only for time lags larger than those affected by trapping

Abstract

4 pages

Particle trapping in three-dimensional fully developed turbulence

Description

Abstract

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