Detention Times of Microswimmers Close to Surfaces: Influence of Hydrodynamic Interactions and Noise.
Detention Times of Microswimmers Close to Surfaces: Influence of Hydrodynamic Interactions and Noise.
复制标题
DOI：
10.1103/physrevlett.115.038101
复制
发表时间：
2014-12
影响因子：
8.6
通讯作者：
K. Schaar;A. Zöttl;H. Stark
中科院分区：
文献类型：
--
作者：
K. Schaar;A. Zöttl;H. Stark
在与表面碰撞后，微泳者在滞留时间内停留在那里。它们积累并可能形成复杂的结构，如生物膜。我们引入了一个通用的框架来计算滞留时间的分布，使用的方法的首次通过时间和研究如何旋转噪声和流体动力相互作用的影响，从一个表面的逃逸。我们比较通用的游泳者模型简单的主动布朗粒子。虽然源偶极子的各自的滞留时间较小，拉的较大的几个数量级，和推显示这两种趋势。我们将我们的研究结果应用到更现实的蠕动模型，我们使用润滑理论，并验证它们的模拟与多粒子碰撞动力学。
After colliding with a surface, microswimmers reside there during the detention time. They accumulate and may form complex structures such as biofilms. We introduce a general framework to calculate the distribution of detention times using the method of first-passage times and study how rotational noise and hydrodynamic interactions influence the escape from a surface. We compare generic swimmer models to the simple active Brownian particle. While the respective detention times of source dipoles are smaller, the ones of pullers are larger by up to several orders of magnitude, and pushers show both trends. We apply our results to the more realistic squirmer model, for which we use lubrication theory, and validate them by simulations with multiparticle collision dynamics.