| 邱流潮,张之豪,袁林娟.基于离散元法的干湿颗粒系统仿真[J].计算力学学报,2015,32(5):681~684 |
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| 基于离散元法的干湿颗粒系统仿真 |
| A discrete element method-based simulation platform for dry and wet particulate systems |
| 投稿时间：2014-08-15 修订日期：2015-05-11 |
| DOI：10.7511/jslx201505017 |
| 中文关键词: 颗粒材料 离散元法 颗粒-流体系统 CFD-DEM |
| 英文关键词:granular materials discrete element method particle-fluid system CFD-DEM |
| 基金项目:国家自然科学基金(11172321);国家自然科学基金青年基金(51309224)资助项目. |
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| 中文摘要: |
| 介绍了基于离散元法的干湿颗粒系统仿真软件DEMSIM。对于干颗粒系统,DEMSIM可以分析二维和三维颗粒系统的弹性和塑性接触碰撞过程;对于湿颗粒系统,DEMSIM采用传统的液桥模型;对于颗粒-流体系统,DEMSIM采用CFD-DEM细观耦合模型模拟。一系列典型算例的模拟分析,验证了干湿颗粒系统仿真软件DEMSIM的精度和有效性。 |
| 英文摘要: |
| A discrete element method-based simulation platform for dry and wet particulate systems,DEMSIM,is introduced in this paper.In the case of dry particulate systems,DEMSIM has the ability to model the elastic and plastic contact of granular systems in two and three dimensions.For particulate system with few liquid,a liquid bridge model is applied in this simulation platform.In addition,a numerical method coupling discrete element method (DEM) with computational fluid dynamics (CFD) is developed to simulate particle-liquid flow in DEMSIM.The liquid motion was considered as a weakly compressible flow solved using CFD solvers while the discrete particle motion is solved using DEM in which the particle-particle interaction are based on theoretical contact mechanics thereby enabling particles to be directly specified using realistic material properties such as friction and elasticity.Several numerical examples are presented to verify the simulation platform by comparing the numerical results with theoretic solution and experimental data in the literature.The results demonstrate the ability to simulate the dynamics of the dry and wet particulate systems. |
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