Large-Scale DEM Simulation of Plate Drag in Closely Packed Dry Granular Materials (Particle Size Effect)

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  • Kobayakawa Murino
    Komatsu MIRAI Construction Equipment Cooperative Research Center, Osaka University
  • Miyai Shinichiro
    Komatsu MIRAI Construction Equipment Cooperative Research Center, Osaka University Department of Mechanical Engineering, Osaka University Development Division, Komatsu Ltd.
  • Tsuji Takuya
    Komatsu MIRAI Construction Equipment Cooperative Research Center, Osaka University Department of Mechanical Engineering, Osaka University
  • Tanaka Toshitsugu
    Komatsu MIRAI Construction Equipment Cooperative Research Center, Osaka University Department of Mechanical Engineering, Osaka University

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  • 密詰め乾燥粉粒体層における平板掘削の大規模DEMシミュレーション（粒子サイズの影響）
  • ミツツメ カンソウ フンリュウタイソウ ニ オケル ヘイバン クッサク ノ ダイキボ DEM シミュレーション(リュウシ サイズ ノ エイキョウ)

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Abstract

<p>The interaction between dry granular materials and a plate is numerically studied using a large-scale discrete element method (DEM) simulation. In the simulation, a vertical flat plate is dragged horizontally through closely packed materials. To examine the effects of particle size on the drag force acting on the plate, five cases with different mean particle diameter Dp50 = 4.0, 2.0, 1.6, 1.2 and 0.8 mm are compared. The results show that for larger particles, the force randomly fluctuates as the plate advances while for smaller particles, the force oscillates with a larger amplitude. The analysis of angular velocity of the particles shows that the force oscillation is attributed to the evolution of shear bands formed only in the bed of the smaller particles.</p>

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