Physical study on the vibrated packing densification of mono-sized cylindrical particles--颗粒学报PARTICUOLOGY

Qian, Q., An, X., Wang, Y., Wu, Y., & Wang, L. (2016). Physical study on the vibrated packing densification of mono-sized cylindrical particles. Particuology, 29, 120-125. https://doi.org/10.1016/j.partic.2016.01.009

Physical study on the vibrated packing densification of mono-sized cylindrical particles

Quan Qian, Xizhong An ^*, Yang Wang, Yongli Wu, Lin Wang

School of Metallurgy, Northeastern University, Shenyang 110004, China

10.1016/j.partic.2016.01.009

Volume 29, December 2016, Pages 120-125

Received 8 June 2015, Revised 5 January 2016, Accepted 20 January 2016, Available online 20 May 2016, Version of Record 18 November 2016.

E-mail: anxz@mail.neu.edu.cn

Highlights

• Packing densification of cylinders under 3D mechanical vibration was experimentally studied.

• The influences of vibration conditions on the packing density were analyzed.

• The maximum random packing density for equiaxed cylinders obtained experimentally was about 0.73.

Abstract

Systematic physical experiments examining the packing densification of mono-sized cylindrical particles subject to 3D mechanical vibration were carried out. The influence of vibration conditions such as vibration time, frequency, amplitude, vibration strength, container size, and the aspect ratio and sphericity of the particle on the packing density were analyzed and discussed. For each initial packing density with a certain aspect ratio, operating parameters were optimized to achieve much denser packing. The results indicate that the packing density initially increases with vibration time and then remains constant. The effects of vibration frequency and amplitude on the packing densification have similar trends, i.e. the packing density first increases with the vibration frequency or amplitude to a high value and then decreases; too large or small frequency or amplitude does not enhance densification. Increasing the container size can reduce container wall effects and help achieve a high packing density. Varying the particle aspect ratio and sphericity can lead to different dense random packing structures. Overall, based on results of the examined systems, the highest random packing density obtained in an infinite sized container can reach 0.73, which agrees well with corresponding numerical and analytical results in the literature.

Graphical abstract

Keywords

Non-spherical particle; Random packing; Cylindrical particle shape; 3D mechanical vibration; Densification

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