Computer simulation of granular shear flows
Computer simulation of granular shear flows
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DOI：
10.1017/s002211208500091x
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发表时间：
1985-02
影响因子：
3.7
通讯作者：
C. Campbell;C. Brennen
中科院分区：
文献类型：
--
作者：
C. Campbell;C. Brennen
由于现有实验方法的不足，对流动颗粒物质的深入了解受到严重阻碍。为了帮助增加信息库，已经开发了一个计算机模拟来描述非弹性完全粗糙颗粒的二维单向流动。本文介绍了一个库埃特剪切流模拟的结果。结果包括速度，密度和颗粒温度（随机粒子运动中包含的动能的测量）的分布。探讨了密度和剪切速率对颗粒温度的影响。固体墙壁上的剪切力和法向力与实验和理论结果进行了比较。粒子在模拟流中的行为进行检查和评估的碰撞角和速度分布。在高密度颗粒流中观察到明显的“分层”微观结构的发展。
Detailed understanding of flowing granular materials is severely hampered by the deficiencies of present experimental methods. To help increase the information base, a computer simulation has been developed to describe two-dimensional unidirectional flows of inelastic fully rough particles. This paper presents the results of a Couette shear-flow simulation. The results include distributions of velocity, density and granular temperature (a measure of the kinetic energy contained in the random particle motions). The effects of density and shear rate on the granular temperature are explored. Shear and normal forces on the solid walls are compared with experimental and theoretical results. The behaviour of the particles in the simulated flow is examined and assessments are made of the collision angle and velocity distributions. The development of a distinct, ‘layered’ microstructure is observed in high-density granular flows.