Abstract

The dynamics of a triangular magnetocapillary swimmer is studied using the lattice Boltzmann method. We extend on our previous work, which deals with the self-assembly and a specific type of the swimmer motion characterized by the swimmer’s maximum velocity centred around the particle’s inverse viscous time. Here, we identify additional regimes of motion. First, modifying the ratio of surface tension and magnetic forces allows to study the swimmer propagation in the regime of significantly lower frequencies mainly defined by the strength of the magnetocapillary potential. Second, introducing a constant magnetic contribution in each of the particles in addition to their magnetic moment induced by external fields leads to another regime characterized by strong in-plane swimmer reorientations that resemble experimental observations.

Graphic Abstract

中文翻译：

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磁毛细管游泳器的运动方式

摘要

使用格子玻尔兹曼方法研究了三角形磁毛细管游泳器的动力学。我们扩展了之前的工作，该工作处理自组装和特定类型的游泳者运动，其特征在于以粒子的反粘性时间为中心的游泳者最大速度。在这里，我们确定了其他运动机制。首先，修改表面张力和磁力的比率可以研究游泳者在主要由磁毛细管势的强度定义的较低频率范围内的传播。其次，除了外部场引起的磁矩之外，在每个粒子中引入恒定的磁性贡献会导致另一种状态，其特征是类似于实验观察的强平面内游泳者重新定向。

图文摘要