2022 Fiscal Year Final Research Report
Development of DEM scaled-up particle model for solid-state and fluid-state particulate flows
Project/Area Number |
20K11850
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 60100:Computational science-related
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Research Institution | Osaka University |
Principal Investigator |
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Project Period (FY) |
2020-04-01 – 2023-03-31
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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.
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Free Research Field |
粉体工学
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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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