Rise or sink: spherical intruder in density frequency dependence static granular fluid

TL;DR

This paper presents a model for a spherical intruder in a vibrating granular bed, showing how frequency-dependent density affects whether the intruder rises or sinks, revealing new behaviors compared to previous studies.

Contribution

The study introduces a frequency-dependent density term in the model, highlighting how vibration frequency influences intruder motion in granular media.

Findings

Swapped rising and sinking regions observed.

Frequency affects buoyant force on the intruder.

Model reveals new intruder behaviors.

Abstract

A simple model for intruder in vibrating granular bed is constructed by introducing a term that governs frequency dependent granular bed density. Varying the vibrating frequency will drive the buoyant force acting on the intruder by the granular bed. Swapped regions of rising and sinking intruder compared to other reported result have bee found.