论文标题
活性布朗颗粒在多孔，圆形壁上的骨料形态
Aggregate morphology of active Brownian particles on porous, circular walls
论文作者
论文摘要
我们研究了在多孔圆形壁上的活性布朗颗粒（ABP）的运动诱导的聚集。我们观察到，静态壁上聚集的密集相的形态取决于壁孔隙度，颗粒运动性和圆壁的半径。我们的分析揭示了两个在形态上不同的密集聚集体。连接的密集簇，可在圆形壁和局部簇上均匀扩散，以打破系统的旋转对称性。这些不同的形态态与在平面，多孔壁上观察到的宏观结构相似。我们系统地分析观察到不同形态状态的参数状态。我们进一步将分析扩展到动向圆环。我们表明，由于活性颗粒形成局部簇时施加的力几乎是弹性弹性的，而当活动粒子形成连续簇时，它会扩散地移动。该属性证明了从ABP系统中提取有用的工作的可能性，即使没有人为地破坏旋转对称性。
We study the motility-induced aggregation of active Brownian particles (ABPs) on a porous, circular wall. We observe that the morphology of aggregated dense-phase on a static wall depends on the wall porosity, particle motility, and the radius of the circular wall. Our analysis reveals two morphologically distinct, dense aggregates; a connected dense cluster that spreads uniformly on the circular wall and a localized cluster that breaks the rotational symmetry of the system. These distinct morphological states are similar to the macroscopic structures observed in aggregates on planar, porous walls. We systematically analyze the parameter regimes where the different morphological states are observed. We further extend our analysis to motile circular rings. We show that the motile ring propels almost ballistically due to the force applied by the active particles when they form a localized cluster, whereas it moves diffusively when the active particles form a continuous cluster. This property demonstrates the possibility of extracting useful work from a system of ABPs, even without artificially breaking the rotational symmetry.
