Boribayeva Aidana, Iniyatova Gulfairuz, Uringaliyeva Aruzhan, Golman Boris
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.
Micromachines (Basel). 2021 Nov 30;12(12):1498. doi: 10.3390/mi12121498.
The porous compacts of non-spherical particles are frequently used in energy storage devices and other advanced applications. In the present work, the microstructures of compacts of monodisperse cylindrical particles are investigated. The cylindrical particles with various aspect ratios are generated using superquadrics, and the discrete element method was adopted to simulate the compacts formed under gravity deposition of randomly oriented particles. The Voronoi tessellation is then used to quantify the porous microstructure of compacts. With one exception, the median reduced free volume of Voronoi cells increases, and the median local packing density decreases for compacts composed of cylinders with a high aspect ratio, indicating a loose packing of long cylinders due to their mechanical interlocking during compaction. The obtained data are needed for further optimization of compact porous microstructure to improve the transport properties of compacts of non-spherical particles.
非球形颗粒的多孔坯块常用于能量存储设备和其他先进应用中。在本工作中，对单分散圆柱形颗粒坯块的微观结构进行了研究。使用超二次曲面生成了具有不同纵横比的圆柱形颗粒，并采用离散元方法模拟了随机取向颗粒在重力沉积下形成的坯块。然后使用Voronoi镶嵌来量化坯块的多孔微观结构。除了一个例外，对于由高纵横比圆柱体组成的坯块，Voronoi单元的中位折合自由体积增加，中位局部堆积密度降低，这表明长圆柱体在压实过程中由于机械互锁而堆积松散。为了进一步优化坯块的多孔微观结构以改善非球形颗粒坯块的传输性能，需要所获得的数据。
