title: Quantifying turbulence-induced segregation of inertial particles.
abstract: Particles with different density from the advecting turbulent fluids cluster due to the different response of light and heavy particles to turbulent fluctuations. This study focuses on the quantitative characterization of the segregation of dilute polydisperse inertial particles evolving in turbulent flow, as obtained from direct numerical simulation of homogeneous isotropic turbulence. We introduce an indicator of segregation amongst particles of different inertia and/or size, from which a length scale r_{seg}, quantifying the segregation degree between two particle types, is deduced.
authors.affiliation: Department of Applied Physics, JMBC Burgers Center for Fluid Dynamics, and IMPACT Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Enrico
authors.initials: E
authors.lastname: Calzavarini
authors.forename: Massimo
authors.initials: M
authors.lastname: Cencini
authors.forename: Detlef
authors.initials: D
authors.lastname: Lohse
authors.forename: Federico
authors.initials: F
authors.lastname: Toschi