9:45 AM - 10:00 AM
[S03A-04] Rheological and Microstructural Characteristics in Granular Shear Flow of 2D Elliptic Particles
Keywords:Granular shear flow, Microstructural characteristics, Elliptic particle
This is an extension work based on our previous work [J. Xiaoyu and T. Matsushima, J. Appl. Mech., JSCE, 2018]1) where we mainly discussed the influence of intergranular frictional coefficients and particle size distributions on the macroscopic properties of shear flow of disk particles. In this paper, a systematic simulation study of dry, granular, gravity-free, two-dimensional (2D) simple shear flow of elliptic particles under various inertial numbers is performed, investigating the influence of particle shape on the flow rheology and microstructural characteristics by Discrete Element Method (DEM). It is found that 1) macroscopic flow properties with different particle shapes follow basic \mu-I rheology model well; 2) both particle orientation and relative particle orientation distributions show strong orientational anisotropies characterized by a_{p} and a_{\Delta}, and the logarithm of probability density functions can be approximated by trigonometric function.