论文标题
两个手性蠕动的近场和远场流体动力相互作用
Near and far-field hydrodynamic interaction of two chiral squirmers
论文作者
论文摘要
流体动力相互作用强烈影响微武器的集体行为。通过这项工作，我们研究了低雷诺数在低场和远场相互作用的情况下，在低雷诺数方面进行了两个流体动力相互作用的自propella propell phiral游泳者的行为。我们使用手性蠕动模型，这是一种具有非轴对称表面滑动速度的球形体，它概括了众所周知的蠕动模型。当游泳者彼此非常接近时，我们计算了它们之间的润滑力。通过改变滑动系数和游泳者的初始配置，我们研究了它们的流体动力行为。在存在润滑力的情况下，游泳者要么相互排斥，要么表现出有界的运动，而游泳者之间的距离会定期改变。润滑力有利于某些参数状态的有限运动。这项研究有助于了解纤毛微生物和人造游泳者的密集悬浮量的集体行为。
Hydrodynamic interaction strongly influences the collective behavior of the microswimmers. With this work, we study the behavior of two hydrodynamically interacting self-propelled chiral swimmers in the low Reynolds number regime, considering both the near and far-field interactions. We use the chiral squirmer model, a spherically shaped body with non-axisymmetric surface slip velocity, which generalizes the well-known squirmer model. We calculate the lubrication force between the swimmers when they are very close to each other. By varying the slip coefficients and the initial configuration of the swimmers, we investigate their hydrodynamic behavior. In the presence of lubrication force, the swimmers either repel each other or exhibit bounded motion where the distance between the swimmers alters periodically. The lubrication force favors the bounded motion in some parameter regime. This study is helpful to understand the collective behavior of dense suspension of ciliated microorganisms and artificial swimmers.
