Clustering of small rigid spherical particles into particle accumulation structures (PAS) is studied numerically for a high-Prandtl-number (Pr = 68) thermocapillary liquid bridge. The one-way-coupling approach is used for calculation of the particle motion, modeling PAS as an attractor for a single particle. The attractor is created by dissipative forces acting on the particle near the boundary due to the finite size of the particle. These forces can dramatically deflect the particle trajectory from a fluid pathline and transfer it to certain tubular flow structures, called Kolmogorov–Arnold–Moser (KAM) tori, in which the particle is focused and from which it might not escape anymore. The transfer of particles can take place if a KAM torus, which is a property of the flow without particles, enters the narrow boundary layer on the flow boundaries in which the particle experiences extra forces. Since the PAS obtained in this system depends mainly on the finite particle size, it can be classified as a finite-size coherent structure (FSCS).

对于高Prandtl数（Pr = 68）热毛细管液桥，数值研究了刚性小球形颗粒聚集成颗粒堆积结构（PAS）。单向耦合方法用于计算粒子运动，将PAS建模为单个粒子的吸引子。由于粒子的有限大小，作用在边界附近的粒子上的耗散力产生了吸引子。这些力会极大地使粒子轨迹从流体路径偏离，并将其转移到某些管状流动结构，称为Kolmogorov-Arnold-Moser（KAM）托里，在该结构中粒子被聚焦，并且可能不再从中逸出。如果KAM环面是无颗粒流的特性，则可以进行颗粒的转移，进入流边界上的狭窄边界层，在该边界层中，粒子会受到额外的力。由于在此系统中获得的PAS主要取决于有限的颗粒尺寸，因此可以将其分类为有限尺寸的相干结构（FSCS）。