Multiparticle dispersion in fully developed turbulence

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

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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 languageEnglish
Pages (from-to)111701-1/4
JournalPhysics of Fluids
Issue number1
Publication statusPublished - 2005


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