| Issue |
EPJ Web Conf.
Volume 340, 2025
Powders & Grains 2025 – 10th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 06013 | |
| Number of page(s) | 4 | |
| Section | Geophysical, Environmental and Planetary Processes | |
| DOI | https://doi.org/10.1051/epjconf/202534006013 | |
| Published online | 01 December 2025 | |
https://doi.org/10.1051/epjconf/202534006013
Pressure Waves During Granular Flows in Varying Gravity Environments
Department of Physics & Astronomy, Mount Holyoke College, South Hadley, MA, USA
* Boston University, Astronomy Department
** Colgate University, Physics & Astronomy Department
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 1 December 2025
Abstract
We present results of LAMMPS Molecular Dynamics simulations of 2D gravity-driven flows of 30,000 soft uniform spheres through a vertical silo. We vary the gravitational field (G), elastic modulus of the particles (E), and silo outlet diameter (D). We present results on upwards pressure waves observed in the system. We compare our results with previous work on granular acoustics. Despite the typical particle speed being substantially less than the measured wave speed, we posit these are nonlinear shock waves, as observed in other systems near jamming. We demonstrate that the wave speeds in all systems appear to follow a power law that is distinct from linear wave expectations.
© The Authors, published by EDP Sciences, 2025
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