Simulating and predicting the behavior of phenomena like landslides depends on a good understanding of granular flow, whether the material is gravel, snow, or soil. Breard et al.  have compared granular flow experiments with calibrated glass beads against numerical models of the same process. The underlying processes are of interest to any researchers studying granular flow processes, including volcanologists and earth scientists interested in debris flow and avalanches. The work has strong implications for interpreting pyroclastic density currents and their deposits.
Citation: Breard, E. C. P., Dufek, J., & Roche, O. . Continuum modeling of pressure‐balanced and fluidized granular flows in 2‐D: Comparison with glass bead experiments and implications for concentrated pyroclastic density currents. Journal of Geophysical Research: Solid Earth, 124. https://doi.org/10.1029/2018JB016874
— André Revil, Editor, JGR: Solid Earth