Cooperative dynamics of a group of intruders subsiding in granular media: A DEM study
Cooperative dynamics of a group of intruders subsiding in granular media: A DEM study
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一群入侵者在颗粒介质中沉降的合作动力学：DEM 研究
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Chuan
中科院分区：
文献类型：
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作者：
C. H. Goey;Chuan
采用二维离散元法（DEM）对随机生成的颗粒床中一组固体侵入体的沉降进行了数值研究，并探讨了这些侵入体的协同行为。在颗粒床表面放置5个具有指定分离距离的入侵者，并以零冲击速度释放沉降。分析了入侵者的动力学特性。此外，还考察了摩擦、边界约束以及侵入物与颗粒床内颗粒的直径和密度比对协同动力学的影响。研究发现，摩擦和边界约束对侵入体的沉降运动有显著影响。最有趣的是，研究表明，入侵者在最初彼此分开，然后彼此靠近时，以一种合作的方式消退，类似于一群鸟在空中的飞行模式。这种合作行为与P…
We numerically investigated the subsidence of a group of solid intruders in a randomly generated granular bed using discrete element method (DEM) in 2D and explored the cooperative behaviour of these intruders. Five intruders with a specified separation distance were placed on the surface of the granular bed and released to subside with zero impact velocity. Dynamics of the intruders was analysed. In addition, the effects of friction, boundary constraints, and the diameter and density ratio of the intruders to particles in the granular bed on the cooperative dynamics were also examined. It was found that friction and boundary constraints significantly affected the subsiding kinematics of the intruders. Most interestingly, it was shown that the intruders subside in a cooperative manner as they initially split from each other, and then move toward each other, resembling the flying pattern of a flock of birds in the air. This cooperative behaviour is in broad agreement with the experimental observations of P...