MercuryDPM: A Fast and Flexible Particle Solver Part A: Technical Advances

Weinhart, Thomas; Tunuguntla, Deepak R.; Schrojenstein-Lantman, M. P. van; Horn, A.J. van der; Denissen, Irana F.C.; Windows-Yule, Kit; Jong, A. C. de; Thornton, Anthony Richard

doi:10.1007/978-981-10-1926-5_139

Cited by 13 publications

(8 citation statements)

References 31 publications

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“…For glass beads with a volume ratio V L /V S = 2 on a rough bottom of small beads, the friction parameters have been determined by Voortwis (2013), using the open-source software package MercuryDPM (Thornton et al 2013a,b;Weinhart et al 2017).…”

Section: Closure Relationsmentioning

confidence: 99%

Bulbous head formation in bidisperse shallow granular flow over an inclined plane

et al. 2019

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Rapid shallow granular flows over inclined planes are often seen in nature in the form of avalanches, landslides and pyroclastic flows. In these situations the flow develops an inversely graded (large at the top) particle-size distribution perpendicular to the plane. As the surface velocity of such flows is larger than the mean velocity, the larger material is transported to the flow front. This causes size segregation in the downstream direction, resulting in a flow front composed of large particles. Since the large particles are often more frictional than the small, the mobility of the flow front is reduced, resulting in a so-called bulbous head. This study focuses on the formation and evolution of this bulbous head, which we show to emerge in both a depth-averaged continuum framework and discrete particle simulations. Furthermore, our numerical solutions of the continuum model converge to a travelling wave solution, which allows for a very efficient computation of the long-time behaviour of the flow. We use small-scale periodic discrete particle simulations to calibrate (close) our continuum framework, and validate the simple one-dimensional (1-D) model with full-scale 3-D discrete particle simulations. The comparison shows that there are conditions under which the model works surprisingly well given the strong approximations made; for example, instantaneous vertical segregation.

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Section: Closure Relationsmentioning

confidence: 99%

Bulbous head formation in bidisperse shallow granular flow over an inclined plane

et al. 2019

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“…In this study, we use MercuryDPM [68,76,77], an opensource implementation of the Discrete Particle Method (DPM) to simulate granular flow in two geometries: a homogeneous stress controlled simple shear box (RVEs) and an inhomogeneous split bottom shear cell, where the local stress is given by the weight of the particles above.…”

Section: Geometriesmentioning

confidence: 99%

Steady state rheology of homogeneous and inhomogeneous cohesive granular materials

et al. 2019

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This paper aims to understand the effect of different particle/contact properties like friction, softness and cohesion on the compression/dilation of sheared granular materials. We focus on the local volume fraction in steady state of various non-cohesive, dry cohesive and moderate to strong wet cohesive, frictionless-to-frictional soft granular materials. The results from (1) an inhomogeneous, slowly sheared split-bottom ring shear cell and (2) a homogeneous, stress-controlled simple shear box with periodic boundaries are compared. The steady state volume fractions agree between the two geometries for a wide range of particle properties. While increasing inter-particle friction systematically leads to decreasing volume fractions, the inter-particle cohesion causes two opposing effects. With increasing strength of cohesion, we report an enhancement of the effect of contact friction i.e. even smaller volume fraction. However, for soft granular materials, strong cohesion causes an increase in volume fraction due to significant attractive forces causing larger deformations, not visible for stiff particles. This behaviour is condensed into a particle friction—Bond number phase diagram, which can be used to predict non-monotonic relative sample dilation/compression.

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“…Discrete Elements Method (DEM) simulations were performed using MercuryDPM code [9], with the same drum, particles, and liquid properties as in the experiments performed by Jarray et al [1,10]. The drum was filled to 35% of its volume with monodisperse glass particles, of density ρ = 2500 kg/m 3 and radius r = 1.25 mm.…”

Section: Dem Simulationsmentioning

confidence: 99%

Liquid migration in flowing granular materials

et al. 2021

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In partially wet granular beds, liquid migrates between particles due to collisions and contacts. This, in turn, influences the flow behaviour of the granular bed. We investigate liquid redistribution in moving monodisperse particles in a rotating drum using Discrete Element Method (DEM) simulations. For weak capillary forces, liquid re-distribution, induced by the continuous flow of particles, leads to concentration of the liquid in the core of the bed, where the flow is quasi-static. High capillary forces reduce the surface flow speed and granular temperature. This decreases liquid bridges rupturing in the flowing layer, allowing the liquid to remain in the outer region of the bed.

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MercuryDPM: A Fast and Flexible Particle Solver Part A: Technical Advances

Cited by 13 publications

References 31 publications

Bulbous head formation in bidisperse shallow granular flow over an inclined plane

Bulbous head formation in bidisperse shallow granular flow over an inclined plane

Steady state rheology of homogeneous and inhomogeneous cohesive granular materials

Liquid migration in flowing granular materials

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