Quantifying turbulence induced segregation of inertial particles
Enrico Calzavarini, Massimo Cencini, Detlef Lohse, and Federico Toschi
TL;DR
This paper introduces a quantitative measure for the segregation of inertial particles in turbulent flow, using direct numerical simulations to analyze how particles of different densities cluster and separate.
Contribution
It presents a novel segregation indicator and a length scale to quantify particle segregation in turbulence, advancing understanding of particle clustering dynamics.
Findings
Segregation indicator effectively measures particle separation.
Length scale r_{seg} quantifies segregation degree.
Simulation results demonstrate the indicator's applicability.
Abstract
Particles with density different from that of the advecting turbulent fluid cluster due to the different response of light/heavy particles to turbulent fluctuations. This study focuses on the quantitative characterization of the segregation of dilute poly-disperse inertial particles evolving in turbulent flow, as obtained from Direct Numerical Simulation of the Navier-Stokes equations. We introduce an indicator of segregation amongst particles of different inertia and/or size, from which a length scale r_{seg} quantifying the degree of segregation of two different types of particles is deduced.
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