关于粒子形状对2毫米以下颗粒的作用的DEM校准见解
Jan Diviš1, David Žurovec2, Álvaro Ramírez-Gómez3
1Department of Mining Engineering and Safety, Faculty of Mining and Geology, VSB-TU Ostrava, 17. listopadu 15/2172, 708 33, Ostrava-Poruba, Czech Republic. jan.divis@vsb.cz.
Scientific reports
|July 2, 2025
概括
本研究提出了一种新的校准方法,用于微粒离散元件方法 (DEM) 模拟. 多面体粒子模型为工业应用提供比球形模型更现实的流动动力学.
科学领域:
- 计算物理学的计算物理.
- 材料科学是一种材料科学.
- 化学工程是化学工程的组成部分.
背景情况:
- 离散元件方法 (DEM) 模拟对于模拟颗粒材料至关重要.
- 传统的DEM模型经常使用球体,对于微粒 (<2mm) 缺乏精度.
- 精确模拟细颗粒的行为对于工业过程如气动输送和混合至关重要.
研究的目的:
- 在DEM模拟中开发和比较球形与多面体粒子形状的校准技术.
- 为了提高细颗粒物材料的DEM模拟的准确性.
- 用实验数据验证校准方法.
主要方法:
- 开发了一种综合性校准技术,将静态和动态参数结合起来.
- 球形和多面体粒子模型对砂 (400-1500微米) 进行了校准.
- 校准参数包括滚动阻力,粒子对粒子恢复和墙壁摩擦,在粉末流量支架上进行验证.
主要成果:
- 在球体粒子模型和多面体粒子模型之间观察到流动力学的显著差异.
- 多面体模型在模拟细颗粒行为的过程中表现出增强的现实性.
- 实验验证证了校准方法的有效性.
结论:
- 与球形模型相比,多面体粒子模型为微粒状材料的DEM模拟提供了更高的准确性.
- 拟议的校准技术可以提高对工业应用的模拟准确性.
- 这项工作为精细粉末的更精确的DEM分析提供了一个框架.
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