Discrete element method for high-temperature spread in compacted powder systems--颗粒学报PARTICUOLOGY

Wang, S., & Zheng, Z. (2017). Discrete element method for high-temperature spread in compacted powder systems. Particuology, 31, 49-53. https://doi.org/10.1016/j.partic.2016.02.005

Discrete element method for high-temperature spread in compacted powder systems

Shuang Wang ^a *, Zhoushun Zheng ^b

a School of Science, Shandong Jianzhu University, Jinan 250101, China
b School of Mathematics and Statistics, Central South University, Changsha 410083, China

10.1016/j.partic.2016.02.005

Volume 31, April 2017, Pages 49-53

Received 21 October 2015, Revised 6 January 2016, Accepted 15 February 2016, Available online 25 July 2016, Version of Record 9 March 2017.

E-mail: wangshuang@sdjzu.edu.cn

Highlights

• Heat generated due to friction among moving particles was deduced from kinetic equations.

• The temperature rise followed a logarithmic relationship with time.

• The spacial distribution of the particulate material influenced the temperature distribution.

Abstract

The discrete element method is applied to investigate high-temperature spread in compacted metallic particle systems formed by high-velocity compaction. Assuming that heat transfer only occurs at contact zone between particles, a discrete equation based on continuum mechanics is proposed to investigate the heat flux. Heat generated internally by friction between moving particles is determined by kinetic equations. For the proposed model, numerical results are obtained by a particle-flow-code-based program. Temperature profiles are determined at different locations and times. At a fixed location, the increase in temperature shows a logarithmic relationship with time. Investigation of three different systems indicates that the geometric distribution of the particulate material is one of the main influencing factors for the heat conduction process. Higher temperature is generated for denser packing, and vice versa. For smaller uniform particles, heat transfers more rapidly.

Graphical abstract

Keywords

Discrete element method; Heat conduction; Friction heat; Numerical simulation

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