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Updated: Nov 12, 2025

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Particle size segregation in two-dimensional circular granular aggregates
Jérémy Sautel1, Charles-Édouard Lecomte1, Nicolas Taberlet1
1Université Lyon, ENS de Lyon, Université Claude Bernard, CNRS, Laboratoire de Physique UMR 5672, F-69342 Lyon, France.
Abstract:
Although many previous studies have focused on the Brazil nut effect, segregation in a self-gravitating circular aggregate remains relatively unexplored. In this paper, size segregation in a two-dimensional assembly of grains in a circular geometry is studied through discrete element method (DEM) numerical simulations. We show that radial segregation within an asteroid submitted to periodic perturbations is not limited to the surface but also occurs in its core. The characteristic time and the overall efficiency of the segregation mechanism are studied as the intensity of the perturbation, the frictional properties, and rotational freedom of individual grains are varied.
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