Rheology of dense vibrated granular flows: Nonmonotonic response controlled by granular temperature
Year: 2026
Type: article
Abstract: We study the rheology of dense granular materials subjected to vertical vibration by using numerical simulations of a stress-imposed vane rheometer. The effective viscosity increases with confining pressure, decreases with vibration amplitude, and exhibits a nonmonotonic dependence on frequency: Weakening is observed at intermediate frequencies but is lost at high frequencies. We show that the rheological response is governed by the balance between grain-scale agitation energy and the stabilizing effect of confinement. This framework reconciles previously observed trends in viscosity and friction weakening and emphasizes the central role of energy injection and dissipation in determining granular flow properties under vibration.
Source: Physical Review Research
DOI: 10.1103/nzmt-b7bf
Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Laboratoire de physique des Solides, Nanyang Technological University, Earth Observatory of Singapore, University of Campania "Luigi Vanvitelli", Istituto Nazionale di Fisica Nucleare, Institute for Complex Systems, Sapienza University of Rome
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
OpenAlex ID: W7131261105