计算物理 ›› 2009, Vol. 26 ›› Issue (3): 403-408.DOI: 10.3969/j.issn.1001-246X.2009.03.010

• 研究论文 • 上一篇    下一篇

颗粒材料上运动物体所受摩擦力的数值模拟

盛小伟, 洛志远, 蔡庆东   

  1. 北京大学工学院力学与空天技术系, 湍流与复杂系统国家重点实验室, 北京 100871
  • 收稿日期:2007-11-16 修回日期:2008-06-23 出版日期:2009-05-25 发布日期:2009-05-25
  • 作者简介:盛小伟(1984-),男,安徽芜湖,硕士,从事计算流体力学方面的研究.
  • 基金资助:
    国家自然科学基金海外杰出基金(No.10128204);北京大学工学院青年学者研究基金资助项目

Numerical Study on Friction Between Solid Body and Granular Material

SHENG Xiaowei, LUO Zhiyuan, CAI Qingdong   

  1. LTCS, Department of Mechanics and Aerospace Technology, College of Engineering, Peking University, Beijing 100871, China
  • Received:2007-11-16 Revised:2008-06-23 Online:2009-05-25 Published:2009-05-25

摘要: 通过数值模拟,考察一定重量的平板在水平颗粒物质层上做匀速运动所引起的剪切颗粒流,并关注其与平板的摩擦力及等效摩擦系数.数值结果表明,等效摩擦系数不是常数,与平板的运动速度有关.这与通常的固体与固体之间剪切作用时所满足的摩擦定律不同,体现了颗粒系统的特殊力学行为.

关键词: 颗粒流动, 摩擦力, 数值模拟, 分子动力学模拟

Abstract: A numerical study on shearing movement of granular system with a dragging solid body on top is presented.It focuses on friction between body and particles.It shows that friction coefficient varies with dragging velocity.This behavior,totally different from interaction between two solid bodies,implies complexity of granular system.

Key words: granular flow, friction, numerical simulation, molecular dynamics modeling

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