Theoretical studies on the rheology of crushable granular particles

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K14428
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Takada Satoshi 東京農工大学, 工学(系)研究科(研究院), 准教授 (00843757)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: レオロジー / 破砕性粉体 / 運動論 / 動弾性論

Outline of Final Research Achievements

We have developed a model that simulates the crushing phenomenon of granular materials, and have performed simulations using the model to investigate the crushing process and rheology of their particles from a microscopic viewpoint. We have also investigated the effects of adhesion and charged particles on rheology. As a complementary approach, a continuum approach using elastodynamic theory has been applied to investigate the stress field inside the particle up to the fracture.

Free Research Field

粉体物理学

Academic Significance and Societal Importance of the Research Achievements

これまであまり理論的に取り扱われてこなかった粉体の破砕が、粉体のレオロジーに与える影響について多面的に研究を実施することができた。また土木工学や地球科学などの諸分野に繋がる学際的なアプローチを行うことで、分野横断的な研究を実施できたことは特筆に値する。将来的にはこの研究を発展させることで、効率的な破砕方法の提案や、逆に破砕されづらい物体の作成などへの応用を広げられるのではないかと考えている。