Tank-treading, swinging, and tumbling of liquid-filled elastic capsules in shear flow

被引：88

作者：

Sui, Y.

Low, H. T. ^{[2
]}

Chew, Y. T. ^{[1
]}

Roy, P. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Lab Fluid Mech, Singapore 119260, Singapore

[2] Natl Univ Singapore, Div Bioengn, Singapore 119260, Singapore

来源：

PHYSICAL REVIEW E | 2008年 / 77卷 / 01期

关键词：

D O I：

10.1103/PhysRevE.77.016310

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The dynamic motion of three-dimensional (3D) capsules in a shear flow is investigated by direct numerical simulation. The capsules are modeled as Newtonian liquid droplets enclosed by elastic membranes, with or without considering the membrane-area incompressibility. The internal liquid of the capsules is the same as that outside. The dynamic motion of capsules with initially spherical and oblate spheroidal unstressed shapes is studied under various shear rates. The results show that spherical capsules deform to stationary configurations and then the membranes rotate around the liquid inside (steady tank-treading motion). Such a steady mode is not observed for oblate spheroidal capsules. It is shown that with the shear rate decreasing, the motion of oblate spheroidal capsules changes from the swinging mode (a capsule undergoes periodic shape deformation and inclination oscillation while its membrane is rotating around the liquid inside) to tumbling mode.

引用

页数：10

共 32 条

[1] Swinging of red blood cells under shear flow [J].