Local rheological measurements in the granular flow around an intruder

Autor:	Seguin, A., Coulais, C., Martinez, F., Bertho, Y., Gondret, P.
Rok vydání:	2015
Předmět:	Condensed Matter - Soft Condensed Matter Physics - Fluid Dynamics
Zdroj:	Phys. Rev. E 93, 012904 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevE.93.012904
Popis:	The rheological properties of granular matter within a two-dimensional flow around a moving disk is investigated experimentally. Using a combination of photoelastic and standard tessellation techniques, the strain and stress tensors are estimated at the grain scale in the time-averaged flow field around a large disk pulled at constant velocity in an assembly of smaller disks. On the one hand, one observes inhomogeneous shear rate and strongly localized shear stress and pressure fields. On the other hand, a significant dilation rate, which has the same magnitude as the shear strain rate, is reported. Significant deviations are observed with local rheology that justify the need of searching for a non-local rheology. Comment: 7 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1507.07965 Zobrazit plný text záznamu View this record from Arxiv