基于多重网格的大长径比颗粒仿真计算

吉林大学学报(理学版) ›› 2019, Vol. 57 ›› Issue (3): 598-606.

基于多重网格的大长径比颗粒仿真计算

孙冰^1, 刘元宁^1, 付宏^1, 于建群^2

1. 吉林大学计算机科学与技术学院, 长春 130012； 2. 吉林大学生物与农业工程学院, 长春 130022

收稿日期:2018-06-30 出版日期:2019-05-26 发布日期:2019-05-20
通讯作者: 于建群 E-mail:yujianqun@jlu.edu.cn

Simulation Calculation of Particle with Large Ratio of Length to Diameter Based on Multigrid

SUN Bing¹, LIU Yuanning¹, FU Hong¹, YU Jianqun²

1. College of Computer Science and Technology, Jilin University, Changchun 130012, China；2. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China

Received:2018-06-30 Online:2019-05-26 Published:2019-05-20
Contact: YU Jianqun E-mail:yujianqun@jlu.edu.cn

摘要/Abstract

摘要： 针对大长径比颗粒(即长径比差异较大颗粒), 采用单重网格法进行邻居搜索时存在因网格尺寸较大, 导致接触计算复杂度较大的问题, 提出一种基于多重网格的新方法. 该方法先将大长径比颗粒（如长秸秆颗粒）虚拟离散为长径比较小的颗粒, 再将离散后的颗粒与其他颗粒一起混合, 采用多重网格法进行邻居搜索. 实验结果表明, 该方法减小了邻居搜索网格尺寸和邻居元颗粒的数量, 从而缩短了接触计算时间, 提高了计算效率.

关键词: 多重网格, 长径比, 离散元法, 接触计算

Abstract: Aiming at the problem that the contact computation was complex due to the large mesh size when using single grid method for neighbor search, we proposed a new method based on multigrid. First, the method virtual discretized particle with large ratio of length to diameter (such as long straw particles) into small ones, then the discrete particles were mixed with other particles, and the multigrid method was used to search neighbor. The experimental results show that the method reduces the size of neighbor search grid and the number of neighbor element particles, thus shortens the contact calculation time and improves the calculation efficiency.

Key words: multigrid, ratio of length to diameter, discrete element method, contact calculation

中图分类号:

TP391

孙冰, 刘元宁, 付宏, 于建群. 基于多重网格的大长径比颗粒仿真计算[J]. 吉林大学学报(理学版), 2019, 57(3): 598-606.

SUN Bing, LIU Yuanning, FU Hong, YU Jianqun. Simulation Calculation of Particle with Large Ratio of Length to Diameter Based on Multigrid[J]. Journal of Jilin University Science Edition, 2019, 57(3): 598-606.

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