Hydrodynamic interactions between two swimming bacteria
Hydrodynamic interactions between two swimming bacteria
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DOI：
10.1529/biophysj.107.110254
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发表时间：
2007-09-01
影响因子：
3.4
通讯作者：
Yamaguchi, T.
中科院分区：
文献类型：
--
作者：
Ishikawa, T.;Sekiya, G.;Yamaguchi, T.
本文对两种游动细菌之间的水动力相互作用进行了精确的评价。我们假设每个细菌都是无作用力和无扭矩的，周围有斯托克斯流场。每种细菌的几何形状都被建模为带有单个螺旋鞭毛的球形或球形主体。用边界元方法计算了两个相互作用的细菌在无限大流体中的运动，并研究了这两个相互作用的细菌和应力的轨迹。结果表明，随着这两种细菌相互靠近，它们在近场中的取向发生了很大的变化。细菌总是相互回避；在本研究中没有观察到稳定的两两游泳运动。讨论了两种细菌之间的流体动力相互作用对半稀细菌悬浮液的流变性和扩散性的影响。
This article evaluates the hydrodynamic interactions between two swimming bacteria precisely. We assume that each bacterium is force free and torque free, with a Stokes flow field around it. The geometry of each bacterium is modeled as a spherical or spheroidal body with a single helical flagellum. The movements of two interacting bacteria in an infinite fluid otherwise at rest are computed using a boundary element method, and the trajectories of the two interacting bacteria and the stresslet are investigated. The results show that as the two bacteria approach each other, they change their orientations considerably in the near field. The bacteria always avoided each other; no stable pairwise swimming motion was observed in this study. The effects of the hydrodynamic interactions between two bacteria on the rheology and diffusivity of a semidilute bacterial suspension are discussed.