确定性横向迁移中液固两相流的三维格子玻尔兹曼模拟  

Three-Dimensional Lattice Boltzmann Simulation of the Liquid-Solid Flows in Deterministic Lateral Displacement

作　　者：彭浩宇 陈英怀 郭钟宁[1] 黄志刚[1] PENG Hao-yu;CHEN Ying-huai;GUO Zhong-ning;HUANG Zhi-gang(School of Electro-mechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广东广州510006

出　　处：《机电工程技术》2018年第8期7-10,184,共5页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金资助项目(编号:500110046);广东省高等学校高层次人才项目(编号:400140016)

摘　　要：确定性横向迁移(DLD)在粒子分选领域中应用较为广泛,采用三维格子玻尔兹曼法,对DLD中的流场特性和粒子临界偏转半径进行了研究。对比了圆形和鹅蛋形DLD中的流场特性,计算了两者的粒子临界偏转半径。仿真发现了非圆微柱能增加有效工作区,改善粒子堵塞,与文献[20]中的结论相符,揭示了不同的微柱形状和边界对流场的均匀性的影响机理,对DLD装置的优化设计具有指导作用。Deterministic lateral displacement(DLD)is widely used in the field of particle separation.In this paper,the three-dimensional lattice Boltzmann Method is used to study the characteristics of the flow field in DLD and the critical deflection radius of the particle,the flow field characteristics of the circular and egg shaped DLD were compared,and the critical deflection radius of the particle of the two shapes is calculated,the simulation found that the non-circular micro-column can increase the effective working area,improve the particle clogging,tally with the previous conclusions in the literature,the influence mechanism of different micro-column shapes and boundaries on the uniformity of flow field is revealed,and has a guiding role on the optimization design of DLD device.

关 键 词：确定性横向迁移 格子玻尔兹曼法 临界偏转半径 流场均匀性 

分 类 号：Q811[生物学—生物工程]