Transport mechanism in a photoelastic chute flow in view of the evolution of force networks
Journal
EPJ Web of Conferences
Journal Volume
340
Start Page
02018
ISSN
21016275
Date Issued
2025-12-01
Author(s)
Abstract
This work adopts high-speed imaging analysis to measure the flow dynamics and the force chain properties for steady chute flows of photoelastic circular disks with fast-changing fringe patterns. We adopt the granular kinetic theory to evaluate collision-based stress components while calibrating the fringe-based force chain properties to evaluate the friction-based stress components. The fringe images allow us to define a new penetration band to clarify the spatial extent of pure-collisional and pure-frictional transport and a possible transition in the mid-layer, within which grain rotation is promoted, which may be associated with the breaking of the force network. Superposition of the collision- and the friction-based stress evaluation does not recover the hydrostatic depth profiles, highlighting an unaddressed transport mechanism or deficiency in the measurement technique.
Event(s)
10th International Conference on Micromechanics on Granular Media, Powders and Grains 2025, Candolim, Goa, 8 December 2025 - 12 December 2025
Publisher
EDP Sciences
Type
conference paper