摘要
根据纳维-斯托克斯方程,分析风沙流的特征和风沙运动的基本规律,推导出流体相控制方程。采用离散单元法和硬球模型对单颗沙粒碰撞规律进行分析。微观上通过建立风沙运动颗粒碰撞的数学模型,如跃移颗粒在空间上的碰撞等,得出颗粒的运动规律,同时模拟出颗粒的受力状况、沙粒速度随高度的变化规律以及输沙量随高度的分布状况。
Based on Navier-stokes equation,the characteristic and basic rule of sand movement are analyzed,and the fluid phase equation is derived.Using the discrete element method and the hard-sphere model,the collision law of a single particle is analyzed.In microcosm,by modeling the particles impact of aeolian sand movement,such as collision about leap particles,the movement law is obtained.The stress model of particles is set up,and the particle velocity-change rule with different heights,and the sediment amount-change law with different heights are simulated.
出处
《机械工程与自动化》
2015年第1期4-6,共3页
Mechanical Engineering & Automation
基金
国家自然科学基金资助项目(11242013)
关键词
风沙运动
硬球模型
输沙量
颗粒碰撞
数值模拟
aeolian sand movement
hard-sphere model
sediment amount
impact of particles
numerical simulation
