Single line particle focusing induced by viscoelasticity of the suspending liquid: theory, experiments and simulations to design a micropipe flow-focuser
Single line particle focusing induced by viscoelasticity of the suspending liquid: theory, experiments and simulations to design a micropipe flow-focuser
复制标题
DOI：
10.1039/c2lc21154h
复制
发表时间：
2012-01-01
期刊：
影响因子：
6.1
通讯作者：
Maffettone, Pier Luca
中科院分区：
文献类型：
--
作者：
D'Avino, Gaetano;Romeo, Giovanni;Maffettone, Pier Luca
我们进行3D数值模拟，启发式建模和微流体实验来证明，第一次，存在一个双稳态的情况下，横向迁移的颗粒悬浮在粘弹性液体在管道中流动。我们的研究结果表明，颗粒的迁移，无论是在中心线或在壁，可以控制的流变性能的悬浮液和颗粒和管的相对尺寸。这些参数的适当选择可以促进粒子在线上的严格对准，即，3D对焦给出了合理控制微管道内流动条件下颗粒聚集的简单设计准则。
We perform 3D numerical simulations, heuristic modeling and microfluidic experiments to demonstrate, for the first time, the presence of a bistability scenario for transversal migration of particles suspended in a viscoelastic liquid flowing in a pipe. Our results show that particle migration, either at the centerline or at the wall, can be controlled by the rheological properties of the suspending liquid and by the relative dimensions of the particle and tube. Proper selection of these parameters can promote strict aligning of particles on a line, i.e., 3-D focusing. Simple design rules are given to rationally control particle focusing under flow in micropipes.