障碍物的设置对颗粒流动过程的影响  

Influence of Obstacles on Granular Flows

作　　者：樊赟赟[1] 王思敬[2] 王恩志[2] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《土木建筑与环境工程》2010年第5期35-40,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金项目(40872152);"十一五"国家科技支撑计划重点项目(2006BAK30B02)

摘　　要：雪崩、滑坡、滚石和泥石流等山地灾害具有很强的破坏性,它们对人类的生命和财产安全构成了严重的威胁,因而需要加强对其发展过程及防治措施的研究。设置障碍物是控制这些山地灾害运动和堆积过程的主要手段,为了研究障碍物的设置对灾害发展过程的影响,采用了SH颗粒流动理论和近似Riemann解的Roe格式有限体积离散方法对颗粒流经不同设置障碍物的流动和堆积过程进行了数值模拟计算,并讨论了障碍物的不同设置对颗粒流动的影响。数值计算结果表明,障碍物的设置对颗粒流动过程将产生较大的影响,只有对障碍物进行正确的设置才能达到防护的目的。数值计算模拟可以优化障碍物的设置,从而为灾害防护和山区规划设计提供经济而合理的参考方案。The mountain hazards like snow avalanches, landslides, rock falls, debris flows and so on all have strong power of destruction which seriously threaten human＇s lives and belongings. Therefore, it is necessary to study more the development of these disasters in order to prevent them. Setting up obstacles is the primary measure to control the movement and deposition process of mountain hazards. For the study of the influence of this measure on the development of disasters, the numerical simulation calculation aiming at the flow and deposition process of the granulars flowing past different built obstacles was made by the theory of SH granular flow and the method of finite volume discretization based on Roe＇s Scheme. Futhermore, the influence of different settings of obstacles on the granular flow is discussed. The numerical results show that the settings of obstacles have a great effect on the process of granular flow. That is, the effective precaution against the disasters is no other than setting up the obstacles correctly. As the numerical simulation calculation can optimize the setting of obstacle, it provides a reasonable and economic reference scheme of disaster prevention and planning of mountain area.

关 键 词：颗粒流动 障碍物 数值模拟 山地灾害 

分 类 号：X141[环境科学与工程—环境科学]