Reorientation of a non-spherical capsule in creeping shear flow
Reorientation of a non-spherical capsule in creeping shear flow
复制标题
蠕变剪切流中非球形胶囊的重新定向
DOI：
10.1103/physrevlett.108.138102
复制
发表时间：
2012
影响因子：
8.6
通讯作者：
大森俊宏
中科院分区：
文献类型：
--
作者：
大森俊宏
The dynamics of a capsule and a biological cell is of great interest in chemical engineering and bioengineering. Although the dynamics of a rigid spheroid is well understood by Jeffery’s theory, that of a spheroidal capsule remains unclear. In this Letter, the motion of a spheroidal capsule or a red blood cell in creeping shear flow is investigated. The results show that the orientation of a nonspherical capsule is variant under time reversal, though that of a rigid spheroid is invariant. Surprisingly, the alignment of a nonspherical capsule over a long time duration shows a transition depending on the shear rate, which can be utilized for a particle-alignment technique. These findings form a fundamental basis of the suspension mechanics of capsules and biological cells.
