Microscopic mechanism of particle detachment in granular materials subjected to suffusion in anisotropic stress states

Suffusion refers to a special form of internal erosion characterized by the selective finest particles soil under action an fluid flow. In this work, microscopic mechanism particle detachment in binary mixtures subjected suffusion different flow directions is analyzed. We use coupled lattice Boltzmann method (LBM) and discrete element (DEM) simulate process granular sample anisotropic stress state. When macro-flow direction aligned with principal compression, it found that more intense, which increases erosion. The anisotropy also influences not necessarily correlated macroscopic direction. sample’s state responsible for directional variations microstructural properties during directions. From microscale point view, contact sliding index P ? are defined demonstrate fluid-induced dominates about detach.