论文标题
凝聚在纤维状颗粒材料中扭结前沿形成中的作用
Role of cohesion in the formation of kink wave fronts in vibrofluidized granular materials
论文作者
论文摘要
数值研究了准二维颗粒系统中扭结前线（KWFS）的形成，重点是单个粒子之间粘性相互作用的作用。基于最近引入的分析模型，通过调整恢复速度依赖性系数来实现凝聚力的粒子相互作用。与实验结果的比较表明，行进kWFS出现的阈值与颗粒层质量高度中心波动的状态与振动周期的三个时期相匹配。干燥和湿的颗粒动力学之间的进一步比较表明，由于凝聚力引起的集体运动增强，KWF在湿的颗粒层中更为明显。
The formation of kink wave fronts (KWFs) in a quasi-two-dimensional granular system is investigated numerically with a focus on the role of cohesive interactions between individual particles. The cohesive particle-particle interaction is achieved through tuning the velocity-dependent coefficient of restitution, based on an analytical model introduced recently. A comparison with experimental results indicates that the threshold for the emergence of traveling KWFs matches the regime in which the center of mass height of the granular layers fluctuates with a period that triples the vibration period. Further comparisons between dry and wet granular dynamics reveal that KWFs are more pronounced in wet granular layers because of enhanced collective motion induced by cohesion.
