Self-Diffusion Scalings in Dense Granular Flows
| Autor: | Riccardo Artoni, Michele Larcher, Patrick Richard, James T. Jenkins |
|---|---|
| Přispěvatelé: | Granulats et Procédés d'Elaboration des Matériaux (MAST-GPEM ), Université Gustave Eiffel, Free University of Bozen-Bolzano, Cornell Tech [New York], Cornell University [New York] |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Shearing (physics)
Physics Self-diffusion granular materials diffusion DEM FOS: Physical sciences General Chemistry Mechanics Condensed Matter - Soft Condensed Matter Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Shear rate Gravitation Physics::Fluid Dynamics [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] 0103 physical sciences Soft Condensed Matter (cond-mat.soft) SPHERES Diffusion (business) 010306 general physics Anisotropy Scaling |
| Zdroj: | Soft Matter Soft Matter, Royal Society of Chemistry, 2021, 17 (9), pp.2596-2602. ⟨10.1039/D0SM01846E⟩ |
| ISSN: | 1744-683X 1744-6848 |
| Popis: | We report on measurements of self-diffusion coefficients in discrete numerical simulations of steady, homogeneous, collisional shearing flows of nearly identical, frictional, inelastic spheres. We focus on a range of relatively high solid volume fractions that are important in those terrestrial gravitational shearing flows that are dominated by collisional interactions. Diffusion over this range of solid fraction has not been well characterized in previous studies. We first compare the measured values with an empirical scaling based on shear rate previously proposed in the literature, and highlight the presence of anisotropy and the solid fraction dependence. We then compare the numerical measurements with those predicted by the kinetic theory for shearing flows of inelastic spheres and offer an explanation for why the measured and predicted values differ. Comment: Published in Soft Matterhttps://pubs.rsc.org/en/content/articlelanding/2021/sm/d0sm01846e\#!divAbstract |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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