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

作　　者：Shuang Wang Zhoushun Zheng 

机构地区：[1]School of Science, ShandongJianzhu University, Jinan 250101, China [2]School of Mathematics and Statistics, Central South University, Changsha 410083, China

出　　处：《Particuology》2017年第2期49-53,共5页颗粒学报（英文版）

基　　金：S. Wang was supported by the Research Fund for Doctoral Program of Shandong Jianzhu University （Grant No. XNBS1338）and the National Natural Science Foundation of China （Grant No. 11471195）. Z. Zheng was supported by the National Natural Science Foundation of China （Grant Nos. 51174236 and 51134003）, the National Basic Research Program of China （Grant No. 2011 CB606306）, and the Opening Project of State Key Laboratory of Porous Metal Materials, China （Grant No. PMM-SKL-4-2012）.

摘　　要：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.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.

关 键 词：Discrete element method Heat conduction Friction heat Numerical simulation 

分 类 号：O[理学]