Effects of confinement on hydrodynamic interactions between a suspended sphere and stationary obstacles
Effects of confinement on hydrodynamic interactions between a suspended sphere and stationary obstacles
复制标题
约束对悬浮球体和静止障碍物之间的流体动力相互作用的影响
DOI：
10.1016/j.compfluid.2012.01.003
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发表时间：
2012
影响因子：
2.8
通讯作者：
R. V. D. Sman
中科院分区：
文献类型：
--
作者：
R. V. D. Sman
通过格子玻尔兹曼模拟，我们推导出了一个经验关系的流体动力学之间的相互作用的一个沉积球和一个障碍物在狭窄的限制流动通道。这种关系对于用于悬浮液分级的微流体装置中的颗粒跟踪是重要的。流体动力学相互作用是无量纲间隙、限制程度以及球体和障碍物的主曲率之比的函数。限制的程度被定义为颗粒直径和长度尺度的比率，其进入受限球体的流动性，并且通过哈伯曼-塞尔相关性的概括来描述。对于大于一定屏蔽长度的间隙，流体动力学相互作用从1/η变化到1/η 2标度。屏蔽长度取决于限制程度。
Via Lattice Boltzmann simulations we have derived an empirical relation for the hydrodynamic interaction between a sedimenting sphere and an obstacle in narrow confining flow channels. This relation is of importance for particle tracking in microfluidic devices used for fractionation of suspensions. The hydrodynamic interaction is a function of the dimensionless gap, the degree of confinement, and the ratio of the principal curvatures of the sphere and obstacle. The degree of confinement is defined as the ratio of particle diameter and the length scale, which enters the mobility of the confined sphere, and is described by a generalisation of the Haberman–Sayre correlation. For gaps larger than a certain the screening length, the hydrodynamic interaction changes over from a 1/η to a 1/η2scaling. The screening length is dependent on the degree of confinement.
影响因子：
2.4
作者：
Tsutsui H;Ho CM
通讯作者：
Ho CM
影响因子：
8.6
作者：
Loutherback, Kevin;Puchalla, Jason;Sturm, James C.
通讯作者：
Sturm, James C.
影响因子：
6.1
作者：
Inglis, DW;Davis, JA;Sturm, JC
通讯作者：
Sturm, JC