Wang Zhengjia, Hao Junhua
Condensed Matter Science and Technology Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.
Department of Physics, Tianjin Renai College, Tianjin 301636, China.
Soft Matter. 2023 Aug 23;19(33):6368-6375. doi: 10.1039/d3sm00523b.
The transport of the binary mixture of self-propelled rods (SPRs) and passive rods in the asymmetric conjugate periodic channel is studied by dissipative particle dynamics (DPD) simulations. It is found that the autonomous pumping of the binary mixture of active and passive rods can be achieved by either the individual or collective behaviour of SPRs. More specifically, the transport of passive rods can be driven through the individual, collective jostlement of the active rods, and crowding out effect. The strength of self-propulsion, rod length, rod concentration, and geometric feature of the channel determines the mechanism of pumping. In addition, the drift of the binary mixture can be in the positive and negative directions of the channel or the currents of SPRs and passive rods in opposite directions and relies on the geometric feature of the channel and concentration of the two species. Overall, our simulation study offers an efficient approach of flow control for both species.
通过耗散粒子动力学（DPD）模拟研究了自驱动棒（SPRs）和被动棒的二元混合物在非对称共轭周期通道中的输运。研究发现，活性棒和被动棒的二元混合物的自主泵送可以通过SPRs的个体行为或集体行为来实现。更具体地说，被动棒的输运可以通过活性棒的个体、集体推挤以及排挤效应来驱动。自推进强度、棒长度、棒浓度和通道的几何特征决定了泵送机制。此外，二元混合物的漂移可以在通道的正负方向，或者SPRs和被动棒的电流方向相反，这取决于通道的几何特征和两种物质的浓度。总体而言，我们的模拟研究为两种物质提供了一种有效的流动控制方法。
