Review on the influence of elastic particle properties on DEM simulation results

Paulick, M.; Morgeneyer, Martin; Kwade, Arno

doi:10.1016/j.powtec.2015.03.040

Cited by 81 publications

(21 citation statements)

References 61 publications

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“…To test the modified Archimedes's law theory for object penetration into cohesionless granular matter, as well as the dynamics of growth of the SZ ahead of the intruding object, we carried out large-scale simulations, using the discrete element method (DEM) [31][32][33] . In our context, the grains and the intruding object are the discrete elements, which interact via contact forces.…”

Section: The Numerical Methodsmentioning

confidence: 99%

Support of modified Archimedes' law theory in granular media

2019

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Section: The Numerical Methodsmentioning

confidence: 99%

Support of modified Archimedes' law theory in granular media

2019

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“…See text for discussion and Movie S1 for a full animation. Details of the calculation are found in the supporting information [Alizadeh et al, 2014;Coetzee and Els, 2009;Cole and Hopkins, 2016;Costa et al, 2010;Davidson et al, 2001;Li and Guenther, 2012;Nakamura and Watano, 2007;Paulick et al, 2015;Peng et al, 2014;Richter et al, 2003;Ruprecht et al, 2012;Tsuji et al, 1993;Wallace and Bergantz, 2005].…”

Section: Force Chainsmentioning

confidence: 99%

On the kinematics and dynamics of crystal‐rich systems

2017

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Partially molten rocks, often called a mush, are examples of a hydrogranular mixture where the dynamics are controlled by both fluid and crystal‐crystal interactions. An obstacle to progress in understanding high‐temperature hydrogranular systems has been the lack of adequate levels of description of microphysical processes. Here we rationalize the hydrogranular kinematic and dynamic states by applying the concept of particle (crystal) force chains. We exemplify this with discrete‐element computational fluid dynamic simulations of the intrusion of a basaltic melt into an olivine‐basalt mush, where crystal‐scale force chains, crystal transport, and melt mixing are resolved. To describe the microscale kinematics of the system, we introduce the coordination number and the fabric tensors of particle contacts and forces. We quantify the changing contact and force fabric anisotropy, coaxiality, and the connectedness of the mush, under dynamic conditions. To describe the dynamics, particle and fluid characteristic response times are derived. These are used to define local and bulk Stokes numbers, and viscous and inertia numbers, which quantify the multiphase coupling under crystal‐rich conditions. We employ the Sommerfeld number, which describes the importance of crystal‐melt lubrication, with a viscous number to illustrate the dynamic regimes of crystal‐rich magmas. We show that the notion of mechanical “lock up” is not uniquely identified with a particular crystal volume fraction and that distinct mechanical behaviors can emerge simultaneously within a crystal‐rich system. We also posit that this framework describes magmatic fabrics and processes which “unlock” a crystal mush prior to eruption or mixing.

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“…Wooden pegs Glass rods simulation decreases with the reduction in the value of the Young's modulus-the numerical solution remains stable with a larger time step by Rayleigh criteria [37]. Interaction parameters necessary for the contact model between particles and particle-mesh (wall) are described in table 4.…”

Section: Peasmentioning

confidence: 99%

Heaping and secondary flows in sheared granular materials

et al. 2016

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Cylindrical containers with a rotating bottom disk (so-called split-bottom geometry) are well established devices to shear granular materials in a continuous way, and to generate well-defined localized shear bands in the granular bed. When material composed of shape-anisotropic grains is sheared in such a container, a secondary flow is generated that leads to the formation of a considerable heap of material near the rotation center. We demonstrate that this effect can be found not only with prolate grains, as shown in a previous study, but also for oblate particle shapes. In addition, the quantitative influence of geometric and dynamic parameters is studied systematically. It is shown that the fill height of the container has considerable influence on the time scale for heap formation, but much less effect on the heap height. Results of numerical simulations agree with the experimental findings and provide insight in the particle dynamics.

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Review on the influence of elastic particle properties on DEM simulation results

Cited by 81 publications

References 61 publications

Support of modified Archimedes' law theory in granular media

Support of modified Archimedes' law theory in granular media

On the kinematics and dynamics of crystal‐rich systems

Heaping and secondary flows in sheared granular materials

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