Multiparticle dispersion in fully developed turbulence

L. Biferale; G. Boffetta; A. Celani; B.J. Devenish; A. Lanotte; F. Toschi

doi:10.1063/1.2130751

Multiparticle dispersion in fully developed turbulence

L. Biferale, G. Boffetta, A. Celani, B.J. Devenish, A. Lanotte, F. Toschi

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Abstract

The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional homogeneous isotropic turbulence. We give evidence of a self-similar regime of shape dynamics characterized by almost two-dimensional, strongly elongated geometries. The analysis of four-point velocity-difference statistics and orientation shows that inertial-range eddies typically generate a straining field with a strong extensional component aligned with the elongation direction and weak extensional/compressional components in the orthogonal plane.

Original language	English
Pages (from-to)	111701-1/4
Journal	Physics of Fluids
Volume	17
Issue number	1
DOIs	https://doi.org/10.1063/1.2130751
Publication status	Published - 2005

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title = "Multiparticle dispersion in fully developed turbulence",

abstract = "The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional homogeneous isotropic turbulence. We give evidence of a self-similar regime of shape dynamics characterized by almost two-dimensional, strongly elongated geometries. The analysis of four-point velocity-difference statistics and orientation shows that inertial-range eddies typically generate a straining field with a strong extensional component aligned with the elongation direction and weak extensional/compressional components in the orthogonal plane.",

author = "L. Biferale and G. Boffetta and A. Celani and B.J. Devenish and A. Lanotte and F. Toschi",

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T1 - Multiparticle dispersion in fully developed turbulence

AU - Biferale, L.

AU - Boffetta, G.

AU - Celani, A.

AU - Devenish, B.J.

AU - Lanotte, A.

AU - Toschi, F.

PY - 2005

Y1 - 2005

N2 - The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional homogeneous isotropic turbulence. We give evidence of a self-similar regime of shape dynamics characterized by almost two-dimensional, strongly elongated geometries. The analysis of four-point velocity-difference statistics and orientation shows that inertial-range eddies typically generate a straining field with a strong extensional component aligned with the elongation direction and weak extensional/compressional components in the orthogonal plane.

AB - The statistical geometry of dispersing Lagrangian clusters of four particles (tetrahedra) is studied by means of high-resolution direct numerical simulations of three-dimensional homogeneous isotropic turbulence. We give evidence of a self-similar regime of shape dynamics characterized by almost two-dimensional, strongly elongated geometries. The analysis of four-point velocity-difference statistics and orientation shows that inertial-range eddies typically generate a straining field with a strong extensional component aligned with the elongation direction and weak extensional/compressional components in the orthogonal plane.

U2 - 10.1063/1.2130751

DO - 10.1063/1.2130751

M3 - Article

VL - 17

SP - 111701-1/4

JO - Physics of Fluids

JF - Physics of Fluids

SN - 1070-6631

IS - 1

ER -

Multiparticle dispersion in fully developed turbulence

Abstract

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