Run-and-Tumble Particles with Hydrodynamics: Sedimentation, Trapping, and Upstream Swimming
Run-and-Tumble Particles with Hydrodynamics: Sedimentation, Trapping, and Upstream Swimming
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DOI：
10.1103/physrevlett.104.258101
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发表时间：
2010-06-22
影响因子：
8.6
通讯作者：
Cates, M. E.
中科院分区：
文献类型：
--
作者：
Nash, R. W.;Adhikari, R.;Cates, M. E.
我们模拟格子玻尔兹曼的非平衡稳态的运行和翻滚粒子（灵感来自细菌的最小模型），相互作用的远场流体力学，受到限制。在重力作用下，流体动力学相互作用几乎不会干扰没有它们的稳定状态，但对于谐波陷阱中的粒子，如果运行长度大于限制长度，则这种状态会发生很大变化：形成自组装泵。同样限制在一个狭窄的通道中的颗粒显示了普瓦维尔流中的通用上游通量：不需要手性游泳。
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.