Interaction between catalytic micro motors
Interaction between catalytic micro motors
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催化微型电机之间的相互作用
DOI：
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Najafi
中科院分区：
文献类型：
--
作者：
P. Bayati;A. Najafi
从球对称主动Janus粒子的微观模型出发，研究了两个主动马达之间的相互作用。环境流体介导两个马达之间的长距离流体动力学相互作用。这种相互作用有直接和间接的流体动力学贡献。直接贡献是由于源自移动马达的流体流的传播，并且影响另一马达的运动。间接的贡献出现在两个电机的存在下，从离子浓度的重新分布。从这种离子溶液施加在流体上的电力增强了流动模式，并随后改变了两个马达的运动。通过制定一个非常远的分离电机的摄动方法，我们得出的跨国和旋转动力学的电动机的解析结果。我们表明，主导阶的整体相互作用修改了电机的平移和旋转速度，其比例为O（
Starting from a microscopic model for a spherically symmetric active Janus particle, we study the interactions between two such active motors. The ambient fluid mediates a long range hydrodynamic interaction between two motors. This interaction has both direct and indirect hydrodynamic contributions. The direct contribution is due to the propagation of fluid flow that originated from a moving motor and affects the motion of the other motor. The indirect contribution emerges from the re-distribution of the ionic concentrations in the presence of both motors. Electric force exerted on the fluid from this ionic solution enhances the flow pattern and subsequently changes the motion of both motors. By formulating a perturbation method for very far separated motors, we derive analytic results for the transnational and rotational dynamics of the motors. We show that the overall interaction at the leading order, modifies the translational and rotational speeds of motors which scale as O (
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