SciELO - Scientific Electronic Library Online

 
vol.113 issue4Optimization of diesel usage at Uitvlugt MineAlpha case formation mechanism in Ti-6Al-4V alloy investment castings using YFSZ shell moulds author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717
Print version ISSN 0038-223X

Abstract

TEFFO, V.B.  and  NAUDE, N.. Determination of the coefficients of restitution, static and rolling friction of Eskom-grade coal for discrete element modelling. J. S. Afr. Inst. Min. Metall. [online]. 2013, vol.113, n.4, pp.351-356. ISSN 2411-9717.

The aim of the project was to experimentally determine the coefficient of restitution, and static and rolling friction of Eskom-grade coal for discrete element modelling (DEM). These parameters will be used in further DEM studies to simulate the flow and behaviour of coal during conveyance. For the simulation to yield realistic results, the parameters for the different coal shapes identified in the samples were determined. DEM uses spherical particles, and it was found that the difference between the DEM default parameters and those measured is significantly different, by as much as 97%, which illustrates the importance of experimentally determining these parameters. The spherical particles in DEM can be used to construct the various coal shapes identified, and the parameters measured can be used to simulate realistic results. The conveyance system can then be optimized accordingly.

Keywords : coal; coefficient of restitution; coefficient of static friction; coefficient of rolling friction; DEM.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License