A numerical investigation into the effect of angular particle shape on blast furnace burden topography and percolation using a GPU solved discrete element model

Govender, N.; Wilke, Daniel N.; Wu, Chuanyu; Tüzün, U.; Kureck, Hermann

doi:10.1016/j.ces.2019.03.077

Cited by 42 publications

(23 citation statements)

References 75 publications

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“…Herewith polyhedra, the forces are calculated from overlapping volumes (Govender et al, 2018). The advantage of contact volume is that both the direction and magnitude of forces can be resolved with an energy-conserving contact scheme (Govender et al, 2019). The contact scheme is illustrated with a cube and a polyhedral particle colliding with a larger cube, shown in Fig.…”

Section: Contact Mechanicsmentioning

confidence: 99%

Verification of Polyhedral DEM with Laboratory Grinding Mill Experiments

Puga

Govender

Rajamani

2022

KONA

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The simulation of grinding mills with the discrete element method (DEM) has been advancing. First, it emerged as a method for studying charge motion with spherical balls and predicting the power draw of the mill. Subsequently, studies on liner wear, charge motion with ellipsoidal and polyhedral shaped particles simulated with three dimensional DEM followed. Further, the impact energy spectra computed in the DEM algorithm is leading to the development of models for the breakage of brittle particles in mills. The core elements in such simulations are the shape of particles in the mill charge and the power draw of the mill due to operating variables. To advance the field, we present a set of experimental data and the corresponding DEM validation results for a 90 × 13 cm mill. The DEM algorithm uses the volume-overlap method which is more realistic for multifaceted irregular particle collisions. Further, we use the scanned shape of the rock media and multifaceted spherical shape for the grinding media to represent as close as possible the actual charge in the mill. First, we present DEM validation for spherical grinding media-only experiments, rock-only experiments, and a mixture of spherical grinding media and rocks, as well as aluminum cubes only to represent the theme of particle shape. Finally, a discussion of the contact mechanics parameters in the four modes of experiments is given. Since the feed ore to plant scale mills can vary in shape, mill simulations with scanned shape of typical particles are the future for more accurate results.

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Section: Contact Mechanicsmentioning

confidence: 99%

Verification of Polyhedral DEM with Laboratory Grinding Mill Experiments

Puga

Govender

Rajamani

2022

KONA

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“…as a surface integral. As an alternative, the contact volume can be computed by sub-dividing the intersection volume into tetrahedra for which efficient closed form expressions exist in computing volumetric and inertial properties [74].…”

Section: Computational Implementationmentioning

confidence: 99%

The effect of particle shape on the packed bed effective thermal conductivity based on DEM with polyhedral particles on the GPU

Govender

Cleary

Kiani-Oshtorjani

et al. 2020

Chemical Engineering Science

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“…in past. Although DEM extends its capabilities to simulate complex shapes using superquadrics [1], polyhedral DEM for convex [13,29] and non-convex particle shapes [12], clustered sphere [8], etc., it still relies on the assumption that the temperature is uniform within each particle which is not valid in some configurations as this present paper will highlight. For more complex contact conditions, it is very difficult to provide an accurate solution using DEM.…”

Section: Introductionmentioning

confidence: 99%

Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach

et al. 2020

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This paper presents a new approach for the modelling of heat transfer in 3D discrete particle systems. Using a combined finite-discrete element (FDEM) method, the surface of contact is numerically computed when two discrete meshes of two solids experience a small overlap. Incoming heat flux and heat conduction inside and between solid bodies are linked. In traditional FEM (finite element method) or DEM (discrete element method) approaches, to model heat transfer across contacting bodies, the surface of contact is not directly reconstructed. The approach adopted here uses the number of surface elements from the penetrating boundary meshes to form a polygon of the intersection, resulting in a significant decrease in the mesh dependency of the method. Moreover, this new method is suitable for any sizes or shapes making up the particle system, and heat distribution across particles is an inherent feature of the model. This FDEM approach is validated against two models: a FEM model and a DEM pipe network model. In addition, a multi-particle heat transfer contact problem of complex-shaped particles is presented.

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A numerical investigation into the effect of angular particle shape on blast furnace burden topography and percolation using a GPU solved discrete element model

Cited by 42 publications

References 75 publications

Verification of Polyhedral DEM with Laboratory Grinding Mill Experiments

Verification of Polyhedral DEM with Laboratory Grinding Mill Experiments

The effect of particle shape on the packed bed effective thermal conductivity based on DEM with polyhedral particles on the GPU

Capturing heat transfer for complex-shaped multibody contact problems, a new FDEM approach

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