泥石流入汇主河的格子Boltzmann模拟  

Lattice Boltzmann simulation of debris flow ingoing primary river

作　　者：王沁[1] 姚令侃[1] 何平[2] 汤家法[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]西南交通大学数学系,四川成都610031

出　　处：《自然灾害学报》2005年第3期29-33,共5页Journal of Natural Disasters

基　　金：国家自然科学基金资助项目(50478085);国家自然科学基金西部重大计划研究项目(90202007);国家自然科学基金"九五"重点资助项目(49831010);西南交通大学校基金资助项目(2004B16)

摘　　要：研究泥石流入汇主河的运动机理,对于预测和防治泥石流入汇主河所造成的灾害非常重要。格子Boltzmann方法是一种将Euler法和Lagrange法结合在一起的新方法。利用格子Boltzmann方法,将支沟中泥石流视为一种宾汉体,主河中清水视为一种外力,建立格子Boltzmann模型,对入汇角为90°的情况进行了模拟。通过与相应的室内实验进行了对比,可以看出,格子Boltzmann方法成功地模拟了泥石流入汇主河,说明格子Boltzmann方法在泥石流预测和防治上有相当大的应用前景,为研究泥石流入汇主河的运动机理提供了一种新手段。When debris flow converge into primary river, the disaster takes place frequently. Research on movement mechanism of the debris flow converging into primary river is important for disaster prevention and control. The lattice Boltzmann method is a good solution for investigating the movement mechanism of the debris flow ingoing primary river. On the assumption that the debris flow is the Bingham body and the water in primary river is a external force, the lattice Boltzmann model is set up. Under the lattice Boltzmann model the debris flow ingoing primary river is simulated, the result is in accord with that from experiment basically.

关 键 词：格子BOLTZMANN模型 泥石流 宾汉模型 格子BGK模型 

分 类 号：O357[理学—流体力学] P642[理学—力学]