三相颗粒介质的微机械建模
Amiya Prakash Das1, Jidong Zhao1, Thomas Sweijen2
1Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon 999077, Hong Kong, Special Administrative Region of China.
概括
一个新的孔隙单元组合-离散元素模型 (PUA-DEM) 模拟了不和颗粒介质中的流体-颗粒相互作用. 这个框架准确地预测水力机械现象,在地质危险和工程领域推进应用.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 计算力学 计算力学 计算力学
背景情况:
- 了解不和颗粒介质对于各种工程应用至关重要.
- 现有的模型往往难以捕捉复杂的孔尺度水力机械相互作用.
- 需要精确模拟流体流动和粒子行为.
研究的目的:
- 为模拟不和颗粒介质引入孔隙单元组件-离散元件模型 (PUA-DEM).
- 开发一个框架,将孔尺度水力学与离散元素方法 (DEM) 整合在一起.
- 为了能够准确地预测部分和颗粒系统中的水力机械现象.
主要方法:
- 开发了一个孔径水力机械框架 (PUA-DEM),将DEM与孔径水力动力模型集成在一起.
- 实施了一种双向合机制,用于双向流体-颗粒反.
- 利用动态孔融合和三角化算法来提高计算效率.
主要成果:
- PUA-DEM准确地复制了玻璃珠和太华沙的实验数据.
- 该模型捕捉了诸如毛细血管/粘性指纹和湿引起的颗粒变形等现象.
- 数字研究证明了毛细血管力和和对颗粒反应的集体影响.
结论:
- PUA-DEM有效地弥合了不和颗粒介质中的孔和粒子尺度物理学.
- 该框架为地缘危险减缓,农业和能源应用提供了变革性的见解.
- 在部分和颗粒系统的预测建模方面取得了进展.
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