SPH-DEM Modeling of the Hydraulic Stability of 2D Blocks on a Slope

A coupled SPH-DEM model for fluid-structure interaction problems with free-surface flow and structural failure

“…In previous research, LBM and SPH are mainly used for simulating fluid flow [7,8] whilst DEM is mainly used for simulating granular flow [9] and solid fracture [10]. Coupled models like SPH-SPH [11], SPH-DEM [12], IBM [13,14] and LBM-DEM [15] have been developed for fluidstructure or fluid-particle interactions.…”

“…On the other hand in the meshfree methods, the identification of free surfaces, moving interfaces and deformable boundaries can be handled straightforwardly [25]. Due to those evident advantages in meshfree methods, some research efforts have been focused on coupling meshfree methods with CFD [12] or FEM [26,27], and even developing coupled meshfree models such as SPH-SPH [11], SPH-DEM [12,28,29] and LBM-DEM [26].…”

“…These models are capable of simulating the free-surface flow and dynamic boundary problems involved in FSI problems, but the kernel functions used in SPH for solid structure lack a physical representation of fracture, not to mention further complications such as the permeation of fluid in the porous or fractured zones of solid structure and the large deformation in FEM is still under numerical challenges. In the coupled SPH-DEM models developed in [12,28] the structures are treated as rigid bodies thus the interaction between structure and fluid is not fully studied and the deformation and fracture of structure has not been achieved. Even if the structures in FSI problems with free surface flow is represented by SPH or FEM, to the authors' best knowledge, none of those models is capable of dealing with fracture or crack initiation in the structure part during the FSI process.…”

“…Among the above models the coupled SPH-FEM model [30], the coupled SPH-SPH model [11,31] and the coupled SPH-DEM [12,28,29] are LagrangianLagrangian schemes. These models are capable of simulating the free-surface flow and dynamic boundary problems involved in FSI problems, but the kernel functions used in SPH for solid structure lack a physical representation of fracture, not to mention further complications such as the permeation of fluid in the porous or fractured zones of solid structure and the large deformation in FEM is still under numerical challenges.…”

Two-phase SPH simulation of fluid–structure interactions

“…In recent years, the mesh-free Smoothed Particle Hydrodynamics (referred as SPH) method becomes quite attractive in simulating the violent deformation of free surface and the wave breaking. As a result, a variety of fluid-structure interaction problems have been investigated by using either SPH (Gao et al, 2012;Liu et al, 2014;Ren et al, 2014) or other similar mesh-free particle models (Koshizuka et al, 1998;Hwang et al, 2014). SPH was originally developed for the astrophysical computations by Gingold and Monaghan (1977) and later modified to model the fluid flows by Monaghan (1994).…”