The Evaluation for Wet Grinding Performance of Beads Mill Using Impulse-Based DEM

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  • Shioiri Kazuki
    Ashizawa Finetech Ltd. Graduate School of Science and Technology, University of Tsukuba
  • Ohmura Hiroyuki
    Graduate School of Science and Technology, University of Tsukuba
  • Asai Mitsuteru
    Department of Civil and Structural Engineering, Kyushu University
  • Mitsume Naoto
    Department of Engineering Mechanics and Energy, University of Tsukuba

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Other Title
  • 力積型個別要素法による湿式ビーズミルの粉砕性能評価
  • リキセキガタ コベツ ヨウソホウ ニ ヨル シッシキ ビーズミル ノ フンサイ セイノウ ヒョウカ

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<p>While the Discrete Element Method (DEM) is expected to evaluate wet grinding performance of bead mills, the conventional DEM requires high computational cost because it has the limitation of the time step size for stable computation. In addition, the simulation of wet grinding process requires additional cost to consider the interaction between beads and fluids by using such as CFD-DEM coupling techniques. This study proposes an analysis system for evaluating wet grinding performance of bead mills with less computational cost. Our proposed system adopts the Impulse-Based DEM (IB-DEM) which can use large time step size, the wall model by using the Sign Distance Function (SDF) which flexibly represents complicated shape walls, and the simple modeling of fluid force which can reduce computational cost. We verify our proposed system by comparing the numerical results with experimental results of bead mills with different shapes of rotors.</p>

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