Comparative Study of Multi-Particle and Particle Chains Based on Relative Motion Model

本文基于单颗粒相对运动模型，扩展构建出多颗粒相对运动模型和颗粒链相对运动模型。针对计算结果、计算效率和计算范围进行了对比分析，得出结论：多颗粒相对运动模型和颗粒链相对运动模型计算结果均与实验结果吻合，具有较高的计算精度；多颗粒相对运动模型的网格数量远高于颗粒链相对运动模型，计算效率较低；对于颗粒数量，多颗粒相对运动模型具有一定的局限性，颗粒链相对运动模型的使用范围相对更宽泛。本文旨在为研究者在不同工况下选择合适的模型提供参考。Based on the single-particle relative motion model, this study develops extended multi-particle and particle chain relative motion models. A comparative analysis was conducted on computational results, efficiency, and scope. The results indicate that both the multi-particle and particle chain relative motion models exhibit high computational accuracy, with predictions in good agreement with experimental data. However, the multi-particle relative motion model requires a significantly larger number of meshes compared to the particle chain relative motion model, resulting in lower computational efficiency. Furthermore, the multi-particle relative motion model demonstrates limitations in handling large particle populations, whereas the particle chain relative motion model offers broader applicability. This study aims to provide references for researchers in selecting appropriate models under varying operational conditions.