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arXiv · 2512.17686

Internal Waves Control Bulk Flow in Silos

David Luce·Adrien Gans·Nicolas Vandewalle·Sébastien Kiesgen de Richter
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Abstract

We experimentally measure paticle acceleration within the bulk during the discharge of a granular silo. We highlight the existence of a deceleration wave emerging at the outlet level near the dead zone and propagates toward the top of the medium. The wave emission frequency is extracted from spatiotemporal diagrams of the Eulerian instantaneous acceleration profiles. Surprisingly, we find that this frequency decreases with the cohesion of the medium and is independent of the outlet size.

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David Luce, Adrien Gans, Nicolas Vandewalle, Sébastien Kiesgen de Richter. 2025-12-19. Internal Waves Control Bulk Flow in Silos. https://arxiv.org/abs/2512.17686

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