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Updated: Jun 22, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Three-dimensional simulations of a vertically vibrated granular bed including interstitial air
Summary
Interstitial air can promote collective motion in vertically vibrated granular beds. Our molecular-dynamics simulations show air
Area of Science:
- Physics
- Granular Mechanics
- Fluid Dynamics
Background:
- Granular materials exhibit complex behaviors when subjected to external forces.
- The role of interstitial fluids, like air, in granular dynamics is not fully understood.
- Understanding these interactions is crucial for various industrial and geophysical applications.
Purpose of the Study:
- To numerically investigate the influence of interstitial air on a vertically vibrated granular bed.
- To analyze the dynamic evolution of granular properties within one oscillation period.
- To validate simulation results against experimental data.
Main Methods:
- A three-dimensional molecular-dynamics simulation approach was employed.
- Interstitial air was phenomenologically included in the simulation model.
- Simulations were validated using experimental data from spherical glass beads in a rectangular container.
Main Results:
- The study reports the evolution of density, granular temperature, and coordination number during vibration.
- The presence of interstitial air was found to affect these granular parameters.
- Three-dimensional simulations indicated that interstitial air can enhance collective granular motion.
Conclusions:
- Interstitial air plays a significant role in the dynamics of vibrated granular systems.
- Numerical simulations provide valuable insights into granular-air interactions.
- The findings contribute to a better understanding of granular material behavior under vibration.
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