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.
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页数：4
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