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2022 Fiscal Year Final Research Report

Development of DEM scaled-up particle model for solid-state and fluid-state particulate flows

Research Project

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Project/Area Number 20K11850
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60100:Computational science-related
Research InstitutionOsaka University

Principal Investigator

Washino Kimiaki  大阪大学, 大学院工学研究科, 講師 (10726384)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywords粗視化モデル / 離散要素法(DEM) / 計算高速化 / 非球形粒子 / 多分散系
Outline of Final Research Achievements

In this work, a scaled-up particle model for Discrete Element Method (DEM), which is sometimes referred to as the coarse grain model, is developed to simulate a particulate flow in an industrial scale process. The model is based on the continuum assumption of an arbitrary flow and can be used to simulate particles in both solid-like and fluid-like states. A scaling law for particle torques is also derived from the same concept. In addition, it is proven that the same theory can be directly reapplied to non-spherical and poly-dispersed particles. Many simulations are performed to discuss the validity of the scaled-up particle model developed.

Free Research Field

粉体工学

Academic Significance and Societal Importance of the Research Achievements

今日の産業で使用されている工業原料の3/4以上は粉粒体であり,工業製品の50%以上は粉粒体,もしくは製造過程で粉粒体を経由している.粉粒体挙動を数値シミュレーションにより理解することは工業的に利用価値が高いだけでなく,物理的にも非常に興味深いものである.本研究で開発された粗視化モデルにより,実工業プロセスで利用されている粉粒体の挙動を,現実的な計算時間で精度良くシミュレーションすることが可能となった.これらのシミュレーションを行うことで,多くの工業プロセスの最適化や品質向上,問題点の改善などが期待され,社会的意義は非常に大きいと言える.

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Published: 2024-01-30  

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