The discrete element method for the simulation of ball mills

Mishra, B.K.; Rajamani, Raj K.

doi:10.1016/0307-904x(92)90035-2

Cited by 315 publications

(92 citation statements)

References 2 publications

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“…The following parameters could be considered small compared to the real material parameters and to the parameters used in other SSDEM simulations (Mishra & Rajamani 1992); however, as explained before, the choice of parameters in general has more to do with the specific phenomenon to be analyzed than with the simulated materials. Here, we will only address the performance of the algorithm to calculate gravitational forces.…”

Section: Validationmentioning

confidence: 99%

Simulating Asteroid Rubble Piles With a Self-Gravitating Soft-Sphere Distinct Element Method Model

Sánchez¹,

Scheeres²

2011

ApJ

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This paper applies a soft-sphere distinct element method Granular Dynamics code to simulate asteroid regolith and rubble piles. Applications to regolith studies in low gravity are also studied. Then an algorithm to calculate self-gravity is derived and incorporated for full-scale simulations of rubble-pile asteroids using Granular Dynamics techniques. To test its validity, the algorithm's results are compared with the exact direct calculation of the gravitational forces. Further avenues to improve the performance of the algorithm are also discussed.

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Section: Validationmentioning

confidence: 99%

Simulating Asteroid Rubble Piles With a Self-Gravitating Soft-Sphere Distinct Element Method Model

Sánchez¹,

Scheeres²

2011

ApJ

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“…The relevance of the method when applied to milling lies in its ability to account for the effects of a number of variables explicitly, including mill speed, mill filling, ball size distribution and liner configuration. It was first applied to simulate ball milling by Mishra and Rajamani (1992), who originally described media motion in two dimensions. The technique is now packaged in a number of commercial as well as open source software, being able to describe media motion in three dimensions, which is critical to provide the quantitative information required for mill simulation (Powell and McBride, 2006;Morrison and Cleary, 2008).…”

Section: Role Of Dem In Advanced Mill Modellingmentioning

confidence: 99%

A Review of Advanced Ball Mill Modelling

Tavares¹

2017

KONA

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In the early 1990s the discrete element method (DEM) was used for the first time to simulate media motion in tumbling mills. Although it has been over a quarter of a century since this tool was first used to predict media motion it has not yet reached maturity to be used in predicting product size distribution and throughput of tumbling mills. However, there has not been shortage of attempts to do so. The literature is relatively vast in the topic and researchers who embark in this area of research will find it difficult to understand the current status of development and also the similarities and fundamental differences that exist amongst the various approaches that have been proposed and pursued over the years. The paper reviews the literature on the application of models based on distributed collision energy information to predict size reduction in tumbling mills, in particular ball mills, analyzing critically various approaches proposed, their limitations and achievements, identifying areas that still require development until the technology becomes ready for being used for optimizing and designing ball mills. Finally, the advances recently accomplished on the approach proposed by the author and his co-workers are then reviewed in greater detail.

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“…While such studies provide some insight into the mechanics of media milling, so far they are of limited value in the analysis and prediction of mill performance. To our knowledge, discrete-element analysis, analogous to recent studies on tumbling and centrifugal ball mills [14,15], has not been attempted for stirred-media mills.…”

Section: Transport and Flowmentioning

confidence: 99%

“…In tumbling ball milling, grinding of higher pulp density slurries typically produces flatter breakage distributions. This effect often necessitates the use of dispersants when the slurry density and viscosity become too high or the mill contents become 14 too fine. In their study, Mankosa et al [24] found that the addition of a dispersant significantly improved the grinding efficiency.…”

Section: 1mentioning

confidence: 99%