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arXiv 2003.03319cond-mat.softphysics.bio-ph
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polymer解中球形蠕动体的增强旋转运动

Enhanced rotational motion of spherical squirmer in polymer solutions

Kai Qi, Elmar Westphal, Gerhard Gompper, Roland G. Winkler

摘要:

利用介观流体力学模拟方法研究了自回避聚合物溶液中自推进、吸引的球形胶体的旋转扩散运动。一个急剧增强的旋转扩散的存在下,活动的数量级以上。这种放大是两种效应的结果:主动运动导致吸附聚合物的量减少,以及与蠕动表面上的聚合物的不对称接触,这会产生旋转运动的额外扭矩和随机噪音。我们的模拟提出了一种方法来控制的旋转动力学的蠕动型microswimmer的聚合物吸附和系统的异质性的程度。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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