Dynamics of granular flow with multi-scale and quantum mechanics

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K21990
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 22:Civil engineering and related fields
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: MAEDA Kenichi 名古屋工業大学, 工学(系)研究科(研究院), 教授 (50271648)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: 土石流 / スティック・スリップ / 粒状体流れ / 二重性 / マイクロメカニクス / 分級 / 浮き上り / 個別要素法

Outline of Final Research Achievements

In this study, we focused on the flow of granular materials, which is represented by the behavior of stone and gravel type mudflows with high particle concentration and large kinetic energy. From the viewpoints of multiscale and duality, the possibility of a unified interpretation of the characteristic behaviors of granular flows, such as the uplift of large particles, which have not yet been clarified, was demonstrated. In the process, we also discovered a reasonable dynamic index and devised a modeling based on the stick-slip phenomenon of granular flows, which laid the foundation for the construction of granular flow dynamics.
The results of this research are important not only for disaster prevention and mitigation, but also from the perspective of post-depositional landform formation, resulting environmental conservation and biodiversity.

Free Research Field

地盤工学

Academic Significance and Societal Importance of the Research Achievements

粒状体流れのゆらぎ（スティック・スリップ）と二重性に着目したチャレンジによって、粒状体流れを捉える新しい原理や土砂災害軽減のための提案、土木、機械、粉体、化学、物理、農学等への学際分野へのインパクトが期待される。
また、防災・減災だけでなく、堆積後の地形形成、それに起因する環境保全や生物多様性等の観点からも重要で意義の高い研究課題である。