Smooth particle hydrodynamics and discrete element method coupling scheme for the simulation of debris flows

2020 ◽  
Vol 125 ◽  
pp. 103669 ◽  
Author(s):  
Mario Germán Trujillo-Vela ◽  
Sergio Andrés Galindo-Torres ◽  
Xue Zhang ◽  
Alfonso Mariano Ramos-Cañón ◽  
Jorge Alberto Escobar-Vargas
Keyword(s):  
Discrete Element Method ◽  
Debris Flows ◽  
Discrete Element ◽  
Coupling Scheme ◽  
Smooth Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Element Method

Smoothed Particle Hydrodynamics and Discrete Element Method Coupling for Influence of Hexagonal Boron Nitride Lubricant Particle on Friction of Elastic Coarse-Grained Micronscale Iron

2021 ◽  
Vol 144 (1) ◽  
Author(s):  
Le Van Sang ◽  
Akihiko Yano ◽  
Ai I. Osaka ◽  
Natsuko Sugimura ◽  
Hitoshi Washizu
Keyword(s):  
Boron Nitride ◽  
Discrete Element Method ◽  
Smoothed Particle Hydrodynamics ◽  
Hexagonal Boron Nitride ◽  
Discrete Element ◽  
Coarse Grained ◽  
Protective Film ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Element Method

Abstract The present study uses the smoothed particle hydrodynamics (SPH) and discrete element method (DEM) coupling to investigate influence of the hexagonal boron nitride (hBN) particles on friction of the elastic coarse-grained micronscale iron. The hBN lubricant particles significantly improve the friction performance of iron in various simulation behaviors. The particle size, the air/water background containing the particles, and its temperature result in reduction of the friction coefficient. The surface mending, the protective film, and the energy dissipation are the main mechanisms related to the friction reduction. Additionally, it is worthy to note that the static friction and the kinetic friction can be clearly observed by this elastic coarse-graining.

scholarly journals Slope Failure of Noncohesive Media Modelled with the Combined Finite–Discrete Element Method

2019 ◽  
Vol 9 (3) ◽  
pp. 579 ◽  
Author(s):  
Xudong Chen ◽  
Hongfan Wang
Keyword(s):  
Discrete Element Method ◽  
Large Scale ◽  
Slope Failure ◽  
Discrete Element ◽  
Material Point ◽  
Contact Forces ◽  
Discrete Elements ◽  
Failure Behaviour ◽  
Particle Hydrodynamics ◽  
Element Method

Slope failure behaviour of noncohesive media with the consideration of gravity and ground excitations is examined using the two-dimensional combined finite–discrete element method (FDEM). The FDEM aims at solving large-scale transient dynamics and is particularly suitable for this problem. The method discretises an entity into a couple of individual discrete elements. Within each discrete element, the finite element method (FEM) formulation is embedded so that contact forces and deformation between and of these discrete elements can be predicted more accurately. Noncohesive media is simply modelled with assembly of individual discrete elements without cohesion, that is, no joint elements need to be defined. To validate the effectiveness of the FDEM modelling, two examples are presented and compared with results from other sources. The FDEM results on gravitational collapse of rectangular soil heap and landslide triggered by the Chi-Chi earthquake show that the method is applicable and reliable for the analysis of slope failure behaviour of noncohesive media through comparison with results from other known methods such as the smoothed particle hydrodynamics (SPH), the discrete element method (DEM) and the material point method (MPM).

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