Stress analysis of an agitated particle bed with different particle aspect ratios by the discrete element method

The size distribution, shape and aspect ratio of particles are the common factors that affect their packing in a particle bed. Agitated powder beds are commonly used in the process industry for various applications. The stresses arising as a result of shearing the bed could result in undesirable par...

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Bibliographic Details
Published in:EPJ Web of conferences 2017-01, Vol.140, p.6022
Main Authors: Goh, Wei Pin, Ghadiri, Mojtaba, Muller, Frans, Sinha, Kushal, Nere, Nandkishor, Ho, Raimundo, Bordawekar, Shailendra, Sheikh, Ahmad
Format: Article
Language:English
Subjects:
Agitation
Aspect ratio
Breakage
Copper
Cylinders
Discrete element method
Manufacturability
Particle size distribution
Powder beds
Ratios
Shearing
Stress analysis
Stress concentration
Stress distribution
Void fraction
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Summary:The size distribution, shape and aspect ratio of particles are the common factors that affect their packing in a particle bed. Agitated powder beds are commonly used in the process industry for various applications. The stresses arising as a result of shearing the bed could result in undesirable particle breakage with adverse impact on manufacturability. We report on our work on analysing the stress distribution within an agitated particle bed with several particle aspect ratios by the Discrete Element Method (DEM). Rounded cylinders with different aspect ratios are generated and incorporated into the DEM simulation. The void fraction of the packing of the static and agitated beds with different particle aspect ratios is analysed. Principal and deviatoric stresses are quantified in the regions of interest along the agitating impeller blade for different cases of particle aspect ratios. The relationship between the particle aspect ratio and the stress distribution of the bed over the regions of interest is then established and will be presented.
ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201714006022