Showing papers by "Kenneth Williams published in 2017"
TL;DR: In this article, a review of numerical models for simulation of gas-solid flow in bypass pneumatic conveying is presented and the experimental results for pressure drops based on a number of test cases are compared with numerical results obtained with different numerical models.
37 citations
TL;DR: In this article, the authors investigated the fundamental stress states within the test specimen that led to this phenomenon, and introduced a new uniform density specimen preparation method for a uniaxial compression test in order to achieve comparative flow functions as per the Jenike direct shear test.
16 citations
TL;DR: In this paper, the effect of particle shape in discrete element modelling of a vibratory sieving process was investigated, with the focus on comparing results from spherical and non-spherical modelling methods.
Abstract: Current spherical particle usage in discrete element modelling (DEM) is not able to accurately reflect the particle shape effect in some specific industrial applications. This study specifically investigated the effect of particle shape in discrete element modelling of a vibratory sieving process, with the focus on comparing results from spherical and non-spherical modelling methods. The particle size distribution of an iron ore material was initially obtained experimentally through vibratory sieving tests. An identical process was replicated in DEM with both spheres and non-spherical particles, and resulting particle size distributions were subsequently compared against the experimental results. A rounded polyhedron shape was utilised to calibrate and generate non-spherical particles based on a 2D particle shape characterisation process. Modelling results suggested that the rounded polyhedron method was able to accurately reflect the particle-sieve contacts without excessive rolling resistance tuning, which was required by the spheres.
13 citations
TL;DR: In this paper, particle degradation was induced experimentally by recursively conveying the fillite material within a pneumatic pipeline, where three electrostatic sensors were embedded along the pipeline to monitor the flow.
8 citations
TL;DR: In this paper, a granule impact indentation-based technique was introduced to simultaneously record the two-dimensional particle dispersion from a spinning concave disc type of spreader.
Abstract: Particle dispersion in the vicinity of an agricultural fertilizer spreader is difficult to capture due to the rapid particle traveling motion. This paper introduced a granule impact indentation-based technique to simultaneously record the two-dimensional particle dispersion from a spinning concave disc type of spreader. A Nitrogen-Phosphorus-Potassium (NPK) type of fertilizer was utilized to induce indentations on aluminum foils placed on the wall panels confining an experimental spreader system. Subsequently, an image processing technique which is comprised of the multicolor edge detection, the curve closing, and the region merging techniques was purposely developed to automatically identify and locate the granule impacts on the sampled foil digital images. Overlapping impacts were characterized based on the granulometry of the fertilizer sample. The reconstructed particle dispersion pattern using the image processing method showed good agreement with the experimental observations. The outcome of...
8 citations
TL;DR: In this article, the wear problem on the internal lining of bins and chutes needs to be addressed before any significant efficiency gains during iron ore mining operations, and the authors investigated the factors determining the wear resistance of common lining materials used in mining operations.
8 citations
TL;DR: In this article, an experimental method is developed to empirically characterise the moisture migration of a coal sample under simulated shipping dynamics, and a predictive model is also developed to estimate the total moisture migration in a full size cargo by properly scaling up the experimental results.
4 citations
01 Sep 2017