论文标题
在聚合物溶液中球形蠕动器的旋转运动增强
Enhanced rotational motion of spherical squirmer in polymer solutions
论文作者
论文摘要
通过中尺度的流体动力模拟研究了一种自propell的，有吸引力的球形胶体的旋转扩散运动。在存在活性的情况下，旋转扩散对旋转扩散的急剧增强。放大是两种效应的结果，这是通过主动运动减少吸附聚合物的量，并且在蠕动表面上与聚合物的不对称相遇，从而产生了旋转运动的额外扭矩和随机噪声。我们的模拟提出了一种通过聚合物吸附和系统异质性的程度来控制蠕动型微晶状体的旋转动力学的方法。
The rotational diffusive motion of a self-propelled, attractive spherical colloid immersed in a solution of self-avoiding polymers is studied by mesoscale hydrodynamic simulations. A drastic enhancement of the rotational diffusion by more than an order of magnitude in the presence of activity is obtained. The amplification is a consequence of two effects, a decrease of the amount of adsorbed polymers by active motion and an asymmetric encounter with polymers on the squirmer surface, which yields an additional torque and random noise for the rotational motion. Our simulations suggest a way to control the rotational dynamics of squirmer-type microswimmers by the degree of polymer adsorption and system heterogeneity.
