# Influence of the size of the intruder on the reorganization of a 2D granular medium

## TL;DR

This study examines how the size of an intruder affects the reorganization and avalanche dynamics in a 2D granular medium, revealing size-dependent arch formation and destabilization phenomena.

## Contribution

It provides new insights into the role of intruder size on granular reorganization and avalanche behavior in two-dimensional packings.

## Key findings

- Small intruders form arches that destabilize periodically.
- Intruder size influences the scale of rearrangements.
- Reorganization dynamics are affected by arch formation and destabilization.

## Abstract

We consider the rearrangements of a vertical twodimensional granular packing induced by the withdrawal of an intruder. Here, we focus on the influence of the size of the intruder on the reorganization process. The long term evolution of the granular packing is investigated as well as the avalanche dynamics that characterize the short term rearrangements around the intruder. For small enough intruder, we observe the formation of arches that periodically destabilize and influence the reorganization dynamics of the two-dimensional packing through larger rearrangement events.