School of Mechanical and Electronic Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, China.
Jiangxi Province Key Laboratory of Polymer Preparation and Processing, Shangrao Normal University, Shangrao 334001, China.
Chaos. 2023 Feb;33(2):023135. doi: 10.1063/5.0131318.
Transport of chiral active particles is numerically investigated in a two-dimensional ring-shaped channel. The ring-shaped channel is transversal asymmetric and can induce the directed transport (rotation) of chiral active particles. For the particles with small chirality, they slide along the outer boundary of the channel. For the particles with large chirality, the particles move along some small local circular orbits and can also exhibit directed rotation. Moreover, the rotation effect can be strongly enhanced by modifying the inner boundary geometry. Based on the study of particle rotation, we further study the separation of active particles with different chiralities. It is found that the particles with different chiralities may be distributed in different regions of the ring-shaped channel. Interestingly, these particles can be completely separated by shifting the channel's inner boundary or adding a blocking plate in the channel. Our results may be useful for understanding relevant experimental phenomena and provide a scheme for the separation of binary mixtures.
在二维环形通道中对手性活性粒子的输运进行了数值研究。环形通道横向不对称，可诱导手性活性粒子的定向输运（旋转）。对于手性较小的粒子，它们沿着通道的外边界滑动。对于手性较大的粒子，粒子沿一些小的局部圆形轨道移动，并且也可以表现出定向旋转。此外，通过改变内边界几何形状可以强烈增强旋转效果。基于对粒子旋转的研究，我们进一步研究了不同手性活性粒子的分离。发现不同手性的粒子可能分布在环形通道的不同区域。有趣的是，通过移动通道的内边界或在通道中添加阻挡板，可以将这些粒子完全分离。我们的结果可能有助于理解相关的实验现象，并为二元混合物的分离提供方案。
