Segregation pattern reorientation of granular mixture on horizontally oscillating tray

TL;DR

This study numerically investigates how the segregation pattern of a binary granular mixture on a horizontally oscillating tray reorients between perpendicular and parallel stripe patterns based on particle area fractions, revealing a transition mechanism.

Contribution

It introduces a numerical analysis of pattern reorientation in granular mixtures, highlighting the transition mechanism based on simplified 1D dynamics.

Findings

Segregation pattern transitions from perpendicular to parallel with changing area fractions.

The transition mechanism is explained through simplified 1D dynamics.

Pattern reorientation depends on the relative size and mass of particles.

Abstract

Reorientation of the segregation pattern of a binary granular mixture on a two-dimensional hor- izontally oscillating tray is numerically realized. The mixture consists of large-and-heavy particles and small-and-light particles, the segregation pattern of which shows a transition between a striped pattern perpendicular to the oscillation and that parallel to the oscillating direction according to the change of area-fractions of two types of particles. The transition mechanism is discussed on the basis of a simplified 1-dimensional dynamics.