摘要
综述全颗粒和单颗粒均匀包覆的颗粒包覆研究层次;对比表面更新模型、蒙特卡罗模拟方法、分区群体平衡模型、DEM-C-PBM模型、CFD-DEM模型等包覆过程数值模拟方法,提出CFD-DEM模型是单颗粒层次的数值模拟方法;基于颗粒包覆数值模拟方法的比较分析,针对颗粒包覆过程的多场耦合特征,提出CFD-DEM-CVD多尺度模型,将宏观流体尺度、介观颗粒尺度、微观材料沉积尺度耦合起来进行包覆过程数值模拟;提出颗粒包覆过程准确数值模拟的发展趋势是基于单颗粒尺度的表面均匀包覆机理研究和基于反应器尺度的物理场分布研究相耦合的多尺度研究方法。
The-research-of-particle-coating-uniformity-is-summarized,-which-is-mainly-divided-into-coating-uniformity-of-all-particles-and-coating-uniformity-of-single-particle.-Comparing-the-current-numerical-simulation-methods-of-particle-coating-process,which-include-the-surface-renewal-model,-the-Monte-Carlo-method,the-discrete-element-method-compartment-population-balance-model-and-the-computational-fluid-dynamics-discrete-element-model,-the-computational-fluid-dynamics-discrete-element-model-is-proposed-as-a-numerical-simulation-method-on-the-scale-of-single-particle.-Based-on-the-comparative-analysis-of-different-numerical-simulation-methods-of-particle-coating-process-and-multi-field-coupling-characteristics-of-particle-coating,-the-CFD-DEM-CVD-model-is-proposed-to-simulate-the-particle-coating-process,-which-couples-macroscopic-fluid-scale,-mesoscopic-particle-scale-and-microscopic-material-deposition-scale.-Besides,-the-trend-of-accurate-numerical-simulation-of-particle-coating-process-is-proposed,-which-is-based-on-the-study-of-single-particle＇s-surface-coating-mechanism-and-the-multiscale-research-of-distribution-of-physical-fields-on-the-reactor-scale.
出处
《中国粉体技术》
CAS
CSCD
2018年第1期7-15,共9页
China Powder Science and Technology
基金
国家自然科学基金项目
编号91634113
21306097
关键词
颗粒包覆过程
包覆均匀性
数值模拟
计算流体力学-离散单元-化学气相沉积法
多尺度耦合
particle coating process
coating uniformity
numerical simulation
computational fluid dynamics-discreteelement method-chemical vapor deposition
multiscale coupling
