An Immersed Boundary-Lattice Boltzmann Simulation of Particle Hydrodynamic Focusing in a Straight Microchannel

被引：18
|
作者：
Sun Dong-Ke [1 ]
Jiang Di [1 ]
Xiang Nan [1 ]
Chen Ke [1 ]
Ni Zhong-Hua [1 ]
机构：
[1] Southeast Univ, Jiangsu Key Lab Design & Manufacture Micronano Bi, Sch Mech Engn, Nanjing 211189, Jiangsu, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2013年 / 30卷 / 07期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
PARTICULATE SUSPENSIONS; NUMERICAL SIMULATIONS; ELEMENT-METHOD; EQUATION; DYNAMICS;
D O I：
10.1088/0256-307X/30/7/074702
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An immersed boundary (IB)-lattice Boltzmamm method (LBM) coupled model is utilized to study the particle focusing in a straight microchannel. The LBM is used to solve the incompressible fluid flow over a regular Eulerian grid, while the IB method is employed to couple the bead-spring model which represents the fluid-particle interaction. After model validation, the simulations for hydrodynamic focusing of the single and multi particles are performed. The particles can be focused into the equilibrium positions under the pressure gradient and self-rotation induced forces, and the particle radius and Reynolds number are the key parameters influencing the focusing dynamics. This work demonstrates the potential usefulness of the IB-LBM model in studying the particle hydrodynamic focusing.
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页数：4
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