Shock wave propagation in vibrofluidized granular materials

TL;DR

This study investigates how shock waves form and move in vibrofluidized granular layers, revealing the dynamics of density and temperature fronts influenced by vibration parameters and particle count.

Contribution

It provides new insights into shock wave behavior in granular materials under vibration, using high-speed imaging to analyze wave formation and propagation.

Findings

Shock waves form near the vibrating plate and propagate upward.

Temperature fronts are located between upward and downward flows.

Driving parameters and particle number affect shock characteristics.

Abstract

Shock wave formation and propagation in two-dimensional granular materials under vertical vibration are studied by digital high speed photography. The steepen density and temperature wave fronts form near the plate as granular layer collides with vibrating plate and propagate upward through the layer. The temperature front is always in the transition region between the upward and downward granular flows. The effects of driving parameters and particle number on the shock are also explored.