DataSheet1_Chiral flow in a binary mixture of two-dimensional active disks.PDF

In this article, we, experimentally, studied the dynamics of a binary mixture of air-fluidized disks. The disks are chiral since they incorporate a set of blades with constant tilt. Both species are identical except for their blade tilt angle, which is rotated by 180° in the second species. We analyzed the phase behavior of the system. Our analysis reveals a wide range of different fluid dynamics, including chiral flow. This chiral flow features in its base state a large vortex. We reported, for certain ranges of relative particle density of each species, inversion of the vorticity of this vortex. We discussed the possible mechanisms behind these chiral flow transitions.

本文通过实验研究了空气流化圆盘（air-fluidized disks）二元混合物的动力学特性。此类圆盘具有手性（chiral），因其内嵌一组固定倾角的叶片。两种圆盘的其余参数完全一致，仅叶片倾角存在差异：第二种圆盘的叶片倾角相较于第一种旋转了180°。我们对该体系的相行为（phase behavior）进行了分析。分析结果显示，该体系涵盖丰富多样的流体动力学（fluid dynamics）现象，其中包括手性流动。该手性流动的基态呈现出大型涡旋结构。我们观测到，当两种颗粒的相对密度处于特定区间时，该涡旋的涡度会发生反转。我们还探讨了这类手性流动转变背后的潜在机制。