Effects of the history (Basset) force on the dispersion of solid particles over a cylinder inside a two-dimensional channel flow associated with von Kármán vortex shedding are investigated. Particles with Stokes numbers (${\mathit{St}}_k$) of 0.1, 0.5, 1.0 and 5.0 and particle-to-fluid density ratios of 1.1, 10 and 1000 are considered. Clustering (i.e. preferential concentration) of particles is studied qualitatively by visualising particle distributions, and quantitatively by analysing the preference of particles in sampling the vorticity field and by using Voronoϊ tessellation analyses. It is found that the effects of history force on the distribution of particles are noticeable only at moderate particle-to-fluid density ratios and Stokes numbers, though not very significant. Nonetheless, our results suggest that for flows with strong vortices the impact of the history force can be significant. It has also been observed for the first time that inclusion of the history force at high Stokes numbers, i.e. ${\mathit{St}}_k=5.0$, can increase particle clustering at both moderate and high particle-to-fluid density ratios. At lower Stokes numbers, however, particle clustering decreases when the history force is taken into account. In general, the history force suppresses the influence of particle inertia in all the investigated cases. Finally, the deposition rate of particles, mainly on the front wall of the cylinder, decreases when the history force is included for all cases except when ${\mathit{St}}_k=0.1$.

研究了历史力（贝塞特）对固体颗粒在圆柱体内在与vonKármán涡旋脱落相关的二维通道流中的分散的影响。斯托克斯数（${\mathit{圣}}_{ķ}$）分别为0.1、0.5、1.0和5.0），颗粒与流体的密度比为1.1、10和1000。通过可视化颗粒分布定性研究颗粒的聚集（即优先浓度），并通过对采样涡度场中的颗粒偏好进行分析并使用Voronoϊ镶嵌分析进行定量研究。发现历史力对颗粒分布的影响仅在中等的颗粒与流体的密度比和斯托克斯数下才显着，尽管不是很明显。尽管如此，我们的结果表明，对于具有强旋涡的流动，历史力的影响可能是巨大的。还首次观察到在高斯托克斯数下包括历史力，即${\mathit{圣}}_{ķ}=5.0$在中等和高的颗粒与流体密度比下，都可以增加颗粒的聚集。但是，在较低的斯托克斯数下，如果考虑历史力，粒子的聚集会减少。通常，历史力在所有研究的情况下均会抑制粒子惯性的影响。最后，当包括所有情况的历史力时，主要在圆柱体前壁上的颗粒沉积速率会降低，${\mathit{圣}}_{ķ}=0.1$。