Development of Powder Analysis Method Using Multiscale and Multiphysics Distinct Element Method

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K14922
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 20010:Mechanics and mechatronics-related
• Research Institution: University of Fukui
• Principal Investigator: Yoshida Tatsuya 福井大学, 学術研究院工学系部門, 准教授 (20734544)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 粉体 / 粒状体 / ボールミル / 個別要素法 / 粗視化 / 連成解析 / 熱伝導解析

Outline of Final Research Achievements

The distinct element method is commonly used to analyze the behavior of powders. The coarse-grained distinct element method reproduces a large number of fine particles with a single coarse-grained particle to reduce computation time when analyzing a large number of particle elements. In this research, methods are proposed to improve the reproducibility of particle behavior and contact forces with mechanical structure elements when a large number of fine particles are reproduced with a single coarse-grained particle element. In addition, heat conduction analysis between particle elements in the coarse-grained distinct element method is applied.

Free Research Field

機械力学

Academic Significance and Societal Importance of the Research Achievements

粉体プロセスにおいて実際の粒子径で解析を行うと必要な粒子要素数が膨大になり，スーパーコンピュータでも工業スケールでの解析は不可能であるため、粒子要素を削減するための粗視化が必要になる．粗視化を適用し粒子の挙動、接触力および熱伝導の解析精度を向上できることは粉体機械の設計および運転に関する技術の高度化に資すると考えられる。