Effect of packing method on packing formation and the correlation between packing density and interparticle force--颗粒学报PARTICUOLOGY

Wu, Y., Hou, Q., Dong, K., & Yu, A. (2020). Effect of packing method on packing formation and the correlation between packing density and interparticle force. Particuology, 48, 170-181. https://doi.org/10.1016/j.partic.2018.07.002

Effect of packing method on packing formation and the correlation between packing density and interparticle force

Yongli Wu ^a, Qinfu Hou ^a *, Kejun Dong ^b, Aibing Yu ^{a c *}

a ARC Research Hub for Computational Particle Technology, Department of Chemical Engineering, Monash University, VIC 3800, Australia
b Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW 2751, Australia
c Centre for Simulation and Modelling of Particulate Systems, Southeast University – Monash University Joint Research Institute, Suzhou 215123, China

10.1016/j.partic.2018.07.002

Volume 48, February 2020, Pages 170-181

Received 17 April 2018, Revised 9 June 2018, Accepted 2 July 2018, Available online 5 December 2018, Version of Record 27 January 2020.

E-mail: qinfu.hou@monash.edu; aibing.yu@monash.edu

Highlights

• Packing of cohesive particles by settling and defluidization was studied using CFD–DEM approach.

• Particle–fluid forces during the agglomeration and the formed packings were discussed.

• Microstructures and force structures were analyzed for different packing methods.

• The generality of the correlation between packing density and interparticle force was discussed.

Abstract

The packing of cohesive particles is of paramount importance in many industries because the packing structure is closely related to process performance. A general relation between packing density and interparticle force was previously proposed based on packing structures formed without dynamic fluid flows. Its universality is examined here in two different packings, formed in settling and defluidization of static and dynamic fluids, respectively. First, it is shown that the packings of the same particles formed by two different methods have different structures because of different impact-induced pressures. Nevertheless, a one-to-one relationship between packing density and structural properties still holds regardless of the different packing methods, and the force distribution in those packings obeys similar rules. Finally, the packing densities obtained by the different methods are demonstrated to be universally correlated with the ratio of the interparticle force to the effective gravity. These findings indicate that different phenomena of particulate systems at a macro- or meso-scale may share similar microscopic origins, with the interparticle force playing a crucial role.

Graphical abstract

Keywords

Packing; Interparticle force; Packing history; Discrete element method; Computational fluid dynamics

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