Run-and-Tumble Particles with Hydrodynamics: Sedimentation, Trapping, and Upstream Swimming

被引：128

作者：

Nash, R. W. ^{[1
]}

Adhikari, R. ^{[1
,2
]}

Tailleur, J. ^{[1
]}

Cates, M. E. ^{[1
]}

机构：

[1] Univ Edinburgh, SUPA, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Inst Math Sci, Madras 600113, Tamil Nadu, India

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

Hydrodynamics;

D O I：

10.1103/PhysRevLett.104.258101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We simulate by lattice Boltzmann the nonequilibrium steady states of run-and-tumble particles (inspired by a minimal model of bacteria), interacting by far-field hydrodynamics, subject to confinement. Under gravity, hydrodynamic interactions barely perturb the steady state found without them, but for particles in a harmonic trap such a state is quite changed if the run length is larger than the confinement length: a self-assembled pump is formed. Particles likewise confined in a narrow channel show a generic upstream flux in Poiseuille flow: chiral swimming is not required.

引用

页数：4

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