基于SPH方法的黏性泥石流堆积形态数值模拟  

Numerical simulation of the accumulation state of viscous debris flow by smooth particle hydrodynamics method

作　　者：缪吉伦[1,2] 张文忠[1,2] 周家俞[1] 

机构地区：[1]重庆交通大学西南水运工程研究所,重庆400016 [2]重庆大学资源及环境学院,重庆400015

出　　处：《自然灾害学报》2013年第6期125-130,共6页Journal of Natural Disasters

基　　金：教育部博士点专项基金资助项目(2011019111036);中央高校基本科研业务费(CDJZR12240070)

摘　　要：泥石流常常导致严重的灾难。黏性泥石流的运动符合宾汉流体运动规律,认为黏性泥石流遵循可压缩流Navier-Stokes方程,建立了基于无网格粒子算法的SPH数值模型。对SPH法的基本原理、核函数及控制方程离散格式、边界处理及数值解法等进行了介绍。在此基础上分析研究了黏性泥石流堆积运动过程,并与试验结果及其他理论方法得到的结果进行了比较,表明该方法能够模拟黏性泥石流的堆积运动过程。Debris flow often causes serious disasters. The viscous debris flow motion agrees with the Bingham movement law, which assumes that the viscous debris flow could be described by compressible Navier-Stokes equations. This study established a meshfree particle SPH （smoothed particle hydrodynamics ） model, and introduced the basic principle, kernel function, discretization scheme and boundary treatments of the SPH. Based on the model, the movement process of the accumulation of viscous debris flows is analyzed. The analysis results are compared with results from experiments and other methods. The model is shown capable of simulating the whole process of accumulation of viscous debris flows.

关 键 词：泥石流 光滑粒子流体动力学 无网格法 数值模拟 

分 类 号：P642.23[天文地球—工程地质学]